CGG Services SA Patent applications |
Patent application number | Title | Published |
20160131785 | METHOD AND SYSTEM FOR MARINE SEISMIC ACQUISITION - A seismic acquisition system includes a streamer spread including at least one streamer, the streamer spread having first and second spread areas characterized by at least one acquisition parameter, the first spread area including streamer sections having a first composition of seismic receivers, and the second spread area including streamer sections having a second composition of seismic receivers. The first composition of seismic receivers has a first value for the at least one acquisition parameter and the second composition of seismic receivers has a second value for the at least one acquisition parameter. | 05-12-2016 |
20160131784 | METHOD AND SYSTEM FOR SIMULTANEOUS ACQUISITION OF PRESSURE AND PRESSURE DERIVATIVE DATA WITH GHOST DIVERSITY - A marine streamer spread for acquiring seismic data, the spread including a streamer having a first portion and a second portion; the first portion including both first pressure sensors and pressure derivative sensors for acquiring the seismic data; and the second portion including second pressure sensors. The first portion imparts ghost diversity to the seismic data by having a variable-depth profile and the pressure derivative sensors impart polarity diversity to the seismic data. | 05-12-2016 |
20160131776 | INSTANTANEOUS FREQUENCY MODULATION ACQUISITION SCHEME FOR SEISMIC SOURCES - Computing device, computer software and methods for generating sweep signals corresponding to plural sources that generate seismic waves. The method includes selecting ( | 05-12-2016 |
20160109597 | DEVICE AND METHOD FOR OPTIMIZATION OF 4D AND 3D SEISMIC DATA - A method and apparatus for noise attenuation. The method includes receiving seismic data associated with at least two vintages (d | 04-21-2016 |
20150346369 | METHODS AND APPARATUS FOR COOPERATIVE NOISE ATTENUATION IN DATA SETS RELATED TO THE SAME UNDERGROUND FORMATION - Cooperative attenuation methods are applied to data sets acquired by surveying a same underground formation which therefore include substantially the same primary signal and different individual noise. The data sets are converted in a wavelet basis by applying a high angular resolution complex wavelet transform. When corresponding coefficients of the data set representations in the wavelet basis differ more than predefined thresholds the coefficients are attenuated as corresponding to noise. | 12-03-2015 |
20150338536 | P-WAVE AND S-WAVE SEPARATION OF SEISMIC DATA IN THE PRESENCE OF STATICS AND IRREGULAR GEOMETRY - Methods and systems for separating P-S wave field data are described. Slowness values for the PP mode and the PS mode are estimated and are, typically, unequal based on aliased and/or irregularly sampled data. A calculation, in the space-time domain, based on a matrix of equations, generates separated P-wave and S-wave data. The separated P-wave data and S-wave data are output for further imaging. | 11-26-2015 |
20150336645 | AUTONOMOUS UNDERWATER VEHICLE MARINE SEISMIC SURVEYS - An autonomous underwater vehicle (AUV) for recording seismic signals during a marine seismic survey. The AUV ( | 11-26-2015 |
20150316675 | OFFSHORE SEISMIC MONITORING SYSTEM AND METHOD - System and method for monitoring a reservoir underwater. The system includes plural nodes, each having a seismic sensor for detecting seismic waves; a remote operated vehicle (ROV) configured to deploy or retrieve the plural nodes to seabed; and an autonomous underwater vehicle (AUV) configured to monitor and exchange data with the plural nodes. At least one node of the plural nodes has a head that houses the seismic sensor and the head is configured to burrow in the seabed, up to a predetermined depth, and the head remains in electrical contact through a connector with a base of the at least one node. | 11-05-2015 |
20150301211 | METHOD AND DEVICE COMPENSATING FOR WATER VELOCITY VARIATION FOR 4D DATA SETS - Methods for determining a seismic wave's propagation velocity in water for monitor seismic data of a 4D data set analyze a relationship between seafloor time-shifts and source-receiver offsets. The time-shifts are differences of normal move out corrected seafloor source-receiver travel times for pairs of traces. Each pair includes a base trace extracted from base seismic data of the 4D data set and a monitor trace extracted from the monitor seismic data, the traces corresponding to the same seafloor bin and having the same source-receiver offset. | 10-22-2015 |
20150241586 | SYSTEMS AND METHODS FOR PRE-CORRELATION NOISE ATTENTUATION USING RANDOM SWEEPS IN SEISMIC DATA PROCESSING - A method for attenuating noise in seismic data signals is described wherein seismic signals are transmitted using a pseudo-random frequency sweep signal. Noise is then attenuated from the resulting, acquired seismic data on pre-phase subtraction basis, e.g., before correlating or de-convolving the acquired seismic data. In this way, repetitions associated with, for example, diversity stacking techniques can be avoided. | 08-27-2015 |
20150236668 | SYSTEMS AND METHODS FOR DE-NOISING SEISMIC DATA - Systems and methods are provided for de-noising seismic data recorded by seismic receivers. A first portion of the seismic data having a first signal-to-noise ratio (SNR) to is processed to generate a de-noising operator or function. The de-noising operator is applied to a second portion of seismic data having a second SNR to remove noise from the second portion of the seismic data, where the first SNR is greater than the second SNR. | 08-20-2015 |
20150185343 | SEISMIC SOURCE ARRAY CALIBRATION AND SYNCHRONIZATION METHOD, APPARATUS AND SYSTEM - Method, apparatus and system for calibrating and synchronizing a seismic acoustic source array ( | 07-02-2015 |
20150138918 | SEISMIC SURVEY SHOT COORDINATION APPARATUS METHOD AND SYSTEM - A system for controlling impulsive sources during a geophysical survey includes a triggering unit that interfaces to an impulsive source and provides an estimated current location for the impulsive source and a shot controller configured to transmit a detonation authorization to the triggering unit. The shot controller or the triggering unit may inhibit detonation of an impulsive source connected to the selected triggering unit if an estimated current location of the impulsive source is substantially different than an intended shot location. A corresponding apparatus and method are also disclosed herein. | 05-21-2015 |
20150138917 | SEISMIC SURVEY SHOT COORDINATION APPARATUS METHOD AND SYSTEM - A method for controlling impulsive sources during a geophysical survey includes receiving a set of predetermined shooting times for an impulsive source, receiving a detonation authorization for the impulsive source, and delaying a triggering of the impulsive source until a next available shooting time of the plurality of predetermined shooting times. A corresponding apparatus and system are also disclosed herein. | 05-21-2015 |
20150120198 | SYSTEM AND METHOD FOR ANALYZING MICROSEISMIC EVENTS USING CLUSTERS - According to an embodiment, a method for analyzing microseismic events associated with hydraulic fracturing detects a new microseismic event and assigns it to a cluster of other events having similar characteristics. Cluster characteristic(s), e.g., average event(s), average source mechanisms, and/or average locations, are updated and used to characterize a future microseismic events. | 04-30-2015 |
20150109884 | DIPOLE SEISMIC SOURCE AND METHOD FOR ADJUSTING RADIATION PATTERN - A seismic survey system for surveying a subsurface. The system includes a dipole seismic source buried in a well and configured to generate P-waves having a first radiation pattern and to generate S-waves having a second radiation pattern; plural seismic sensors distributed about the dipole seismic source and configured to record seismic signals corresponding to the P- and S-waves; and a controller connected to the dipole seismic source and configured to drive it. A longitudinal axis of the dipole seismic source is inclined with an inclination angle (θ) relative to gravity. | 04-23-2015 |
20150109881 | DEMULTIPLE USING UP/DOWN SEPARATION OF TOWED VARIABLE-DEPTH STREAMER DATA - Methods and systems for processing data acquired using a variable-depth streamer, obtain up-going and down-going wavefields at a predetermined datum, and use them to identify multiples included in the up-going wavefield. An image of a geological formation under the seabed is then generated using the data from which the multiples have been removed, and/or the multiples. | 04-23-2015 |
20150084783 | GEOPHYSICAL SURVEY NODE ROLLING METHOD AND SYSTEM - A method for acquiring geophysical data includes connecting a power module comprising a data transfer port and a power transfer port to a geophysical data acquisition device to provide a geophysical sensing node and deploying the geophysical sensing node. While deployed, data is transferred from the geophysical data acquisition device to the power module via the data transfer port and power is transferred from the power module to the geophysical data acquisition device via the power transfer port. The method also includes retrieving the geophysical sensing node and replacing the power module with a newly charged power module to provide a newly charged geophysical sensing node, and deploying the newly charged geophysical sensing node. Corresponding systems are also disclosed herein. | 03-26-2015 |
20150036461 | 3-D HARMONIC-SOURCE REVERSE TIME MIGRATION SYSTEMS AND METHODS FOR SEISMIC DATA ANALYSIS - Computing device and method for processing seismic traces to produce an image of a subsurface area. The method includes receiving a series of seismic traces related to the subsurface area and recorded by one or more seismic receivers, wherein the one or more seismic sources are originally generated by a source; applying a phase encoding function to the series of seismic traces, at least a portion of said seismic traces comprise signals reflected by geological interfaces of the subsurface area; applying a 3 dimensional (3D) harmonic-source reverse time migration of the series of seismic traces encoded with the phase encoding function; computing a forward wavefield by solving a first wave equation; computing a backward wavefield by solving a second wave equation; and cross-correlating the forward wavefield with the backward wavefield to generate an image of the subsurface. | 02-05-2015 |
20150020726 | LEAD-IN CABLE WITH A REPLACEABLE PORTION AND METHOD - A lead-in cable used to tow a streamer behind a vessel includes a replaceable portion removably connected between a portion of the lead-in cable attached to the vessel and the streamer. Alternatively a lead-in additional cable is inserted between a lead-in cable and a towed streamer. The replaceable portion or the lead-in additional cable covers a portion most likely to be damaged between the streamer and the towing vessel. | 01-22-2015 |
20150009780 | METHOD AND APPARATUS FOR RECEIVER-SIDE DEGHOSTING OF SEISMIC DATA - Apparatus, computer instructions and method for combining first and second records to form a substantially deghosted seismic record. | 01-08-2015 |
20140376331 | WIDE AZIMUTH SEISMIC DATA ACQUISITION METHOD AND SYSTEM SKIPPING LINES - Wide azimuth data acquisition systems using at least three streamer sets achieve shorter survey time and enhanced angular coverage relative to conventional systems using two streamer sets. Various techniques such as high-density seismic source activation and alternating surveyed bands with skipped bands lead to data quality similar to the conventional system, while maintaining the increased productivity advantage. | 12-25-2014 |
20140376330 | WIDE AZIMUTH SEISMIC DATA ACQUISITION METHOD AND SYSTEM WITH AT LEAST THREE STREAMER SETS - Wide azimuth data acquisition systems using at least three streamer sets achieve shorter survey time and enhanced angular coverage relative to conventional systems using two streamer sets. Various techniques such as high-density seismic source activation and alternating surveyed bands with skipped bands lead to data quality similar to the conventional system, while maintaining the increased productivity advantage. | 12-25-2014 |
20140376329 | SYSTEMS AND METHODS FOR REDUCING MARINE FOULING - Systems and methods are provided for a marine seismic streamer usable underwater for marine seismic surveys. The marine seismic streamer includes: a lead-in section; at least one bird section; at least one data acquisition module; and at least one vibration module configured to vibrate the marine seismic streamer, wherein the lead-in section, the at least one bird section, the at least one data acquisition module and the at least one vibration module are connected together to form the marine seismic streamer. | 12-25-2014 |
20140369163 | STATIONARY MARINE VIBRATORY SOURCE FOR SEISMIC SURVEYS - There is a method for obtaining control of a source array configured to generate seismic waves. The method includes accessing an interface unit attached to a fixed structure that is substantially stationary in water, the interface unit being connected to a source array; entering a passcode to the interface unit to gain access to the source array; downloading a shooting sequence or a driving signal to a controller of the source array; and actuating the source array to generate seismic energy into water. | 12-18-2014 |
20140369162 | VIBRATOR SOURCE ARRAY BEAM-FORMING AND METHOD - There is a method for finding a best distribution of source elements that form a vibratory source array. The method includes inputting plural constraints for the source elements; generating plural distributions of the source elements that fulfill the plural constraints; calculating for each distribution a performance index characterizing the source array; and selecting the best distribution from the plural distributions based on a value of the performance index. | 12-18-2014 |
20140369161 | STATIONARY MARINE VIBRATORY SOURCE FOR SEISMIC SURVEYS - A seismic data acquisition system is configured to collect seismic data. The system includes a marine source array configured to be attached to a fixed structure floating at the water surface and including vibratory source elements; and a controller configured to control the vibratory source elements so that a beam formed by the source array is steerable. | 12-18-2014 |
20140365135 | COHERENT NOISE ATTENUATION METHOD - Computing device, computer instructions and method for denoising input seismic data d. The method includes receiving the input seismic data d recorded in a first domain by seismic receivers, wherein the input seismic data d includes pure seismic data ss relating to an exploration source and coherent noise data n generated by a man-made device; generating a model m in a second domain to describe the input seismic data d; and processing the model m to obtain an output seismic dataset d′ indicative of seismic data substantially free of the coherent noise data n generated by the man-made device. | 12-11-2014 |
20140365131 | REGULARIZATION OF MULTI-COMPONENT SEISMIC DATA - Presented are methods and systems for regularizing content of multi-component seismic data. The method includes a step of receiving the seismic data, wherein the seismic data includes pressure and particle motion measurements and a step of regularizing and frequency optimizing the seismic data to desired positions based on Fresnel zones selected at various depths in a subsurface to obtain a regularized seismic dataset. | 12-11-2014 |
20140362658 | DEVICE AND METHOD FOR DEGHOSTING VARIABLE DEPTH STREAMER DATA INCLUDING PARTICLE MOTION DATA - Computing device, computer instructions and method for de-ghosting seismic data related to a subsurface. The method may include receiving input seismic data recorded by seismic receivers that located at different depths (z | 12-11-2014 |
20140334255 | COLLAR SYSTEM AND METHOD FOR RECOVERING A TOW MEMBER IN A MARINE SURVEY SYSTEM - A marine survey system includes a collar configured to be affixed to a tow member, to connect a separation member to the tow member and to release the separation member when a lock-release condition is met. Alternatively or additionally, the marine survey system includes a variable drag force mechanism configured to generate a first drag force pushing the collar downstream before the collar reaches a downstream element beyond which the collar cannot move, and to generate a second drag force after the collar has reached the downstream element. | 11-13-2014 |
20140328140 | METHOD APPARATUS AND SYSTEM FOR MIGRATION NOISE ATTENUATION AND IMAGE ENHANCEMENT - A method for processing seismic data includes receiving seismic data and a velocity model (c(x)) for a plurality of locations (x), scaling a dimension of the seismic data according to the velocity model (c(x)) to provide a velocity normalized seismic data, and generating a final image (S(x)) of the subsurface using the velocity normalized seismic data. The velocity normalized seismic data may be a reverse-time migration image (I(x,ξ)) corresponding to the plurality of locations (x) and a plurality of propagation distance offsets (ξ). The method may also include transforming the reverse-time migration image (I(x,ξ)) for the plurality of selected positions (x) to a wavenumber domain to provide velocity normalized wavenumber data (I(k,ψ)) and suppressing data components corresponding to non-physical or undefined reflection angles to provide enhanced wavenumber data (I′(k,ψ)) and using the enhanced wavenumber data (I′(k,ψ)) to generate the final image (S(x)). A corresponding apparatus is also disclosed herein. | 11-06-2014 |
20140321238 | REMOTELY OPERATED MODULAR POSITIONING VEHICLE AND METHOD - Method and marine acoustic source array for generating an acoustic wave in a body of water. The marine acoustic source array includes first and second external source sub-arrays, each sub-array including one or more individual source elements; a first actuator device connected to the first external source sub-array; and a second actuator device connected to the second external source sub-array. The first actuator device has a corresponding cable configured to connect to a first lead-in, and the second actuator device has a corresponding cable configured to connect to a second lead-in such that a position of the source array as a whole is controllable along a line substantially perpendicular to a path of the source array. | 10-30-2014 |
20140321236 | METHODS AND UNDERWATER BASES FOR USING AUTONOMOUS UNDERWATER VEHICLE FOR MARINE SEISMIC SURVEYS - An underwater base handles an autonomous underwater vehicle. The underwater base includes a storing part configured to store the AUV; a control part configured to control the storing part; and a support part configured to support the control part and the storing part and to prevent a burial of the underwater base into the ocean bottom. The control part is further configured to guide the AUV while approaching a desired target position on the ocean bottom. | 10-30-2014 |
20140310433 | GEOPHYSICAL DATA ACQUISITION AND POWER TRANSFER METHOD APPARATUS AND SYSTEM - System, apparatus and method for collecting data from, and providing power to, a geophysical data acquisition device are described herein. The method may include charging a data transfer device comprising a data transfer port, a power transfer port and a battery module, coupling the data transfer device to a geophysical data acquisition device, deploying the geophysical data acquisition device and collecting data therewith, collecting data from the geophysical data acquisition device via the data transfer port and providing power to the geophysical data acquisition device via the power transfer port, replacing the data transfer device with a charged device, coupling the data transfer device to a charging station, transferring data from the data transfer device, and transferring power to the data transfer device via the charging station. | 10-16-2014 |
20140309938 | SPHERICAL HELIX PROJECTION MICROSEISMIC NETWORK - Methods and systems for designing or configuring a microseismic monitoring network are described. The design is based on a regular and homogeneous repartitioning of seismic sensor locations associated with a focal sphere. The methods and systems determine an optimal sampling of the focal sphere of microseismic events and a takeoff angle associated with each of the optimal sampling points. The sampling points are propagated to the surface based on the associated rays and any of a plurality of ray tracing techniques. | 10-16-2014 |
20140307525 | DRONE SEISMIC SENSING METHOD AND APPARATUS - An apparatus for automated seismic sensing includes a seismic sensing device for sensing seismic vibrations, a robotic transport unit for transporting the seismic sensing device to a targeted location, an engagement unit for placing the seismic sensing device in vibrational communication with the ground, and a recording module for recording the seismic data generated by the seismic sensing device. A corresponding method for automated seismic sensing includes transporting a seismic sensing device to a targeted location with a robotic transport device, determining a coupling metric for the seismic sensing device and the ground at a plurality of locations proximate to the targeted location, determining an acceptable location for seismic sensing, placing the seismic sensing device in vibrational communication with the ground at the acceptable location, and sensing seismic data with the seismic sensing device at the acceptable location. | 10-16-2014 |
20140306057 | SYSTEMS AND METHODS FOR USING A HYBRID STYLE AIRSHIP - Systems and methods are provided for a communication system configured to be used in land geophysical operations. The system includes: a balloon configured to lift one or more antennas; at least one cable connected to the balloon and configured for transmission of at least one of power and data, configured as a tether connected to the balloon and configured to be deployed such that an altitude of the balloon is between 50 and 100 meters; one or more antennas mounted internally or externally to the balloon and configured to extend a communication range between a base station, a command and control truck, and one or more seismic shooting devices for communicating information associated with seismic acquisition activities; and an electronics suite configured to trigger a controlled descent of the balloon and configured to deflate the balloon. | 10-16-2014 |
20140305222 | SEISMIC SENSOR CABLE TAKEOUT - A device includes a housing in which a seismic sensor module is at least partially housed, a cable connected to the seismic sensor module, and, a takeout through which the cable extends from the housing. The takeout is operable between a first configuration in which the cable extends vertically from the housing and a second configuration in which the cable extends horizontally from the housing. | 10-16-2014 |
20140305200 | IN SITU GEOPHYSICAL SENSING APPARATUS METHOD AND SYSTEM - An apparatus for in situ geophysical sensing includes a sensor for measuring geophysical data and a liquid absorbent member connected to the sensor that expands in response to contacting a liquid and thereby physically couples the sensor to a local sensing environment. The liquid absorbent member may be formed of beads or pellets or powder that includes a liquid absorbent material. The liquid absorbent member may also include a soluble binding agent for binding the beads or pellets or powder into an integral member such as a casing for containing the sensor. A method and system corresponding to the apparatus are also described herein. The apparatus, method and system described herein may be used to improve borehole sensor data quality without adding significant complexity to the borehole sensor deployment process. | 10-16-2014 |
20140303898 | DEVICE AND METHOD FOR DE-BLENDING SIMULTANEOUS SHOT DATA - Device, medium and method for de-blending seismic data. The method for de-blending seismic data associated with a subsurface of the earth includes receiving initial seismic traces recorded by plural sources; de-blending, in a processor, the initial seismic traces to generate de-blended seismic traces; and generating an image of the subsurface based on the de-blended seismic traces. The initial seismic traces include uncontaminated portions corresponding to time intervals substantially free from cross-talk from other sources, and the uncontaminated portions are used to remove cross-talk noise on other initial seismic traces. | 10-09-2014 |
20140301162 | ACQUISITION SYSTEM AND METHOD FOR BLENDED SEISMIC DATA - System, medium and method for de-blending seismic data. The method for acquiring blended seismic data associated with a subsurface of the earth includes receiving coordinates of a sail line associated with first and second shot point locations; towing first and second source arrays in water along the sail line; shooting the first and second source arrays with a constant delay parameter so that a seismic trace recorded by a seismic sensor has at least a first uncontaminated portion that includes seismic energy generated substantially only by one of the first and second source arrays and a second portion that includes seismic energy generated by both the first and second source arrays; and recording blended seismic data generated by the first and second source arrays with the seismic sensor. | 10-09-2014 |
20140301161 | MARINE SEISMIC SURVEY AND METHOD USING AUTONOMOUS UNDERWATER VEHICLES AND UNDERWATER BASES - A seismic survey system records seismic signals during a marine seismic survey. The system includes at least two underwater bases and plural autonomous underwater vehicles (AUVs) that carry appropriate seismic sensors. An AUV is housed by an underwater base and it is launched to a final destination from the underwater base. The AUV receives pinger signals from at least two underwater bases for correcting its trajectory toward the final destination. | 10-09-2014 |
20140301158 | DEVICE AND METHOD FOR STABLE LEAST-SQUARES REVERSE TIME MIGRATION - There is a method for generating a final image of a subsurface of the earth. The method includes receiving measured seismic data d of the subsurface; selecting an objective function E that is function of a reflectivity r of the subsurface; and calculating, in a processor, the reflectivity r based on the measured seismic data d, the objective function E, simulated data {tilde over (d)}, a modeling operator M from a reverse time demigration (RTDM) process and an imaging operator M | 10-09-2014 |
20140297193 | SEISMIC METHODS AND SYSTEMS EMPLOYING SHALLOW SHEAR-WAVE SPLITTING ANALYSIS USING RECEIVER FUNCTIONS - Methods and systems for shallow shear-wave splitting analysis using receiver functions of seismic data are described. Radial and transverse receiver functions are calculating by, for example, performing cross-correlations of vertical component data with radial component data and vertical component data with transverse component data, respectively. The receiver functions are then used to determine orientation and other characteristics associated with shear waves passing through an azimuthally anisotropic layer. | 10-02-2014 |
20140297192 | SYSTEM AND METHOD FOR INTERPOLATING SEISMIC DATA BY MATCHING PURSUIT IN FOURIER TRANSFORM - Methods and systems for interpolating seismic data estimate a first frequency spectrum associated with the seismic data using a matching point (MP) algorithm having a pre-computed term. A second frequency spectrum is also estimate for the seismic data, using the MP algorithm, an anti-aliasing mask and the estimated first regular frequency spectrum. From the second frequency spectrum, the interpolated seismic data can be determined by performing an inverse fast Fourier Transform thereon. | 10-02-2014 |
20140297191 | PREDICTING SENSITIVITY TO POSITIONING FOR SEISMIC SURVEYS - A geophysical target-oriented approach is proposed to derive seismic sensitivity to 4D positioning mismatches, which focuses on the impact on the reflective response from the reservoir. The sensitivity indicators provide information about the seismic impact, in terms of reservoir imaging, of a surface positioning mismatch. Some embodiments capitalize on the use of legacy data, enabling a fast-track analysis to be carried out on the velocity model to extract trends and mapping of lateral geological variability. | 10-02-2014 |
20140297190 | MONITORING OF SOURCE SIGNATURE DIRECTIVITY IN SEISMIC SYSTEMS - Methods and systems for generating a stability indicator associated with source directivity between shots and based on a signature are described. The stability indicator is computed by comparing a reference directivity cube to a source directivity cube using a partitioned intensity uniformity (PIU) metric. In another aspect, the stability indicator can be normalized to produce a scalar stability indicator expressed in percentage. | 10-02-2014 |
20140297189 | SEISMIC SYSTEMS AND METHODS EMPLOYING REPEATABILITY SHOT INDICATORS - Methods and systems for generating multi-criteria shot indicators are described. The multi-criteria shot indicator values can be weighted and the weighting factors can themselves incorporate one or more sensitivity factors. In another aspect, the shot indicators are related to the 4D repeatability and/or the 3D stability of seismic features associated with individual shots or sets of shots. The multi-criteria shot indicators can be evaluated in real-time onboard a seismic vessel and included as part of an infill reshoot decision making/quality control process. | 10-02-2014 |
20140297188 | TIME-FREQUENCY REPRESENTATIONS OF SEISMIC TRACES USING WIGNER-VILLE DISTRIBUTIONS - Presented are methods and systems for reducing or eliminating spurious error or cross-terms when using bilinear functions in a time-frequency analysis. A maximum entropy method is applied to a Wigner-Ville distribution of seismic traces to provide a robust and high resolution time-frequency representation of the seismic traces. | 10-02-2014 |
20140290554 | SELF-BURYING AUTONOMOUS UNDERWATER VEHICLE AND METHOD FOR MARINE SEISMIC SURVEYS - An autonomous underwater vehicle (AUV) for recording seismic signals during a marine seismic survey. The AUV includes a body having a base and sides; a propulsion system for guiding the AUV to a final target on the ocean bottom; a pump-jet connected to an inlet and plural base outlets, wherein the plural base outlets are distributed on the base; a processor connected to the pump-jet and configured to activate the pump-jet when the base in on the ocean bottom; and a seismic sensor configured to record seismic signals. The pump-jet has a first low speed so that water jets expelled at the plural base outlets fluidize the ocean bottom underneath the base and buries the AUV. | 10-02-2014 |
20140288891 | SYSTEM AND METHOD FOR MODELLING THREE DIMENSIONAL SHALLOW WATER MULTIPLES USING PREDICTIVE SEA FLOOR RECONSTRUCTION - A method for modeling shallow water multiples modeling using a predicted sea floor reconstruction is provided. A seafloor reflectivity image is reconstructed using acquired seismic data. Surface multiples are determined by evaluating a seismic wave equation using, as an input, the reconstructed seafloor reflectivity image. The determined surface multiples are subtracted from the acquired seismic data. | 09-25-2014 |
20140288843 | VECTOR-DIP FILTERING OF SEISMIC DATA IN THE TIME-FREQUENCY DOMAIN - Methods and systems for separating surface wave velocity information from surface wave noise in seismic data are described. The seismic data can be comprised of irregularities in spatial sampling, non-stationarity in time and non-stationarity in frequency. The methods and systems can then be adapted to create a multi-component dip filter that removes high amplitude dispersive noise from the seismic data based on the use of slant stacking. | 09-25-2014 |
20140288842 | METHOD AND DEVICE FOR ATTENUATING RANDOM NOISE IN SEISMIC DATA - Methods and devices for seismic data processing attenuate noise by replacing an attribute value v(i) of a selected data point i with a weighted average {circumflex over (ν)}(i) of attribute values of data points j from a window that includes the selected data point i. The contribution to the weighted average of an attribute value v(j) corresponding to a data point j depends on how similar attribute values in the neighborhood N | 09-25-2014 |
20140288838 | SYSTEM AND METHOD FOR INTERPOLATING SEISMIC DATA - A system and method of interpolating seismic data is provided. The system and method form a plurality of pairwise Hankel tensors from acquired seismic data, and a respective pairwise Hankel tensor for each of a plurality of originally collected frequency slices, perform tensor completion on each of said pairwise Hankel tensors to recover a plurality of interpolated frequency slices, and combine said plurality of interpolated frequency slices with said originally collected frequency slices to form a set of trace data of a geographical area of interest. | 09-25-2014 |
20140286128 | SYSTEMS AND METHODS FOR PERFORMING DUAL-SCALE INTERPOLATION - Systems and methods are provided for processing seismic data and displaying an output associated with the seismic data. A method includes: separating the seismic data into a fine-scale dataset and a coarse-scale dataset, wherein each dataset includes a non-zero portion of the data; applying a first interpolation to the coarse-scale dataset which results in an interpolated coarse-scale dataset; applying a second interpolation to the fine-scale dataset which results in an interpolated fine-scale dataset, wherein the first and second interpolation are different interpolations; summing together the interpolated coarse-scale dataset and the interpolated fine-scale dataset which results in a summed interpolated dataset; and displaying at least one image based on the summed interpolated dataset. | 09-25-2014 |
20140269184 | LAND HYDROPHONE AND METHOD - A seismic sensor system collects seismic data in a well. The system includes a pipe to be deployed inside the well, the pipe having a distal end; a first sensor located inside the pipe, next to the distal end; and a bladder jacket in which the pipe is placed, the bladder jacket being configured to hold a fluid. The pipe has holes next to the first sensor so that the fluid surrounds and contacts the first sensor. | 09-18-2014 |
20140254318 | BURIED HYDROPHONE WITH SOLID OR SEMI-RIGID COUPLING - According to an embodiment, a seismic receiver device is described for use in a borehole surrounded by an ambient material, e.g., rock, mud, etc. The seismic receiver device includes a pressure wave measuring device which is configured to sense pressure changes associated with received seismic waves, a coating layer disposed on the pressure wave measuring device, and an outer layer disposed on the coating layer which is made of a material that is selected to have a bulk modulus number that is substantially similar to a bulk modulus number of the ambient medium. In this way, the acoustic impedance of the device is better matched to the ambient material so that more accurate seismic acquisition may be performed. | 09-11-2014 |
20140254313 | METHOD AND SYSTEM FOR AUGMENTING FREQUENCY RANGE OF CONVENTIONAL MARINE SEISMIC SOURCE WITH LOW-FREQUENCY - A resonant source element configured to generate seismic waves. The resonant source element includes a housing; a high-pressure system configured to be discharged inside the housing; and a first conduit attached to an opening of the housing, wherein a distal end of the first conduit freely communicates with an ambient. | 09-11-2014 |
20140254312 | METHOD AND SYSTEM FOR AUGMENTING FREQUENCY RANGE OF CONVENTIONAL MARINE SEISMIC SOURCE WITH LOW-FREQUENCY - A resonant source element is configured to generate seismic waves in water. The resonant source element includes a housing having two openings covered by first and second pistons, wherein the first and second pistons are configured to freely translate relative to the housing to generate the seismic waves; and a high-pressure system configured to discharge inside the housing and to actuate the first and second pistons. The first and second pistons are configured to oscillate after the high-pressure system is fired to generate low-frequency seismic waves. | 09-11-2014 |
20140254311 | AUTONOMOUS CLEANING DEVICE FOR SEISMIC STREAMERS AND METHOD - A cleaning device for cleaning a marine element towed in water and related methods are provided. The cleaning device includes a body configured to enclose the marine element; at least one wing attached to the body and configured to impart translational and rotational motion to the body when interacting with the water; a switching and locking mechanism configured to change an orientation of the at least one wing between a first orientation and a second orientation when contacting a stopper and also to lock the selected orientation; rotating means attached to an internal surface of the body and configured to contact the marine element, the rotating means having axles that make a fix angle with a longitudinal axis of the body; and a cleaning tool attached to the body and configured to clean the marine element. | 09-11-2014 |
20140251199 | JET-PUMP-BASED AUTONOMOUS UNDERWATER VEHICLE AND METHOD FOR COUPLING TO OCEAN BOTTOM DURING MARINE SEISMIC SURVEY - An autonomous underwater vehicle (AUV) for recording seismic signals during a marine seismic survey. The AUV includes a body having a head part and a tail part); a propulsion system for guiding the AUV to a final target on the ocean bottom; a jet pump group connected to the body and including plural jet pumps; a control device connected to the jet pumps; and a seismic sensor configured to record seismic signals. The jet pump group controls a steering of the AUV by generating water jets according to a given sequence. | 09-11-2014 |
20140249758 | DEVICE AND METHOD FOR RESIDUAL MOVEOUT PICKING OF GHOSTED SEISMIC DATA - A device, medium and method for processing ghosted seismic data associated with a subsurface of the earth. The method includes receiving the ghosted seismic data; receiving an initial velocity model; computing, in a processor, gathers G and mirror gathers M based on the ghosted seismic data and the initial velocity model; and calculating residual moveout curves r for each gather. | 09-04-2014 |
20140249755 | METHOD AND DEVICE FOR CALCULATING TIME-SHIFTS AND TIME-STRAINS IN SEISMIC DATA - A method for calculating time-strains for two seismic data sets resulting from seismic exploration of the same subsurface structure uses selected subsets of data from the two seismic data sets to calculate time-shifts for each trace. A smooth function is fitted along each trace based on the calculated time-shifts a time derivative is applied to the smooth function to obtain time-strains along each trace. | 09-04-2014 |
20140247692 | DEFLECTOR FOR MARINE SEISMIC SURVEY SYSTEM - A deflector is configured to be attached to a cable towed by a vessel. The deflector includes a foil configured to provide a lift force; first and second bulbs attached to opposite ends of the foil; and a joint attached to the foil and configured to receive the cable. The first and second bulbs are offset by a predetermined distance from a plane that extends through the foil, and at least one of the first and second bulbs has a longitudinal axis that makes an angle (θ) with a cord of the foil, the cord extending in the plane. | 09-04-2014 |
20140247690 | ANTIFOULING PROTECTIVE SKIN SECTION FOR SEISMIC SURVEY EQUIPMENT AND RELATED METHODS - One or more portions of a streamer or other equipment of a seismic survey system (e.g., birds, buoys, deflectors, etc.) are covered with protective removable skin sections. A protective removable skin section includes a flexible sheet and a reversible closure system configured to join edges of the flexible sheet. The protective removable skin section may be mounted onboard of a vessel, when the equipment is deployed. | 09-04-2014 |
20140244178 | SYSTEM AND METHOD FOR CORRECTING NEAR SURFACE STATICS BY USING INTERNAL MULTIPLES PREDICTION - Disclosed is a system and method for predicting internal multiples generators to correct near surface statics, by estimating a first timing or position associated with reflectors using internal multiple generators identified based on predictive deconvolution operators, estimating a second timing or position associated with the reflectors using the acquired seismic surface data, comparing the first timing or position with the second timing or position for each of the reflectors to determine a travel time delay associated with the reflectors, and correcting the acquired seismic surface data using the travel time delay. | 08-28-2014 |
20140242261 | METHODS AND APPARATUSES FOR RESTORING LOW ROUGHNESS OF OUTER SURFACE OF A DEVICE USED UNDERWATER FOR SEISMIC SURVEYS - Various methods preserve or restore the low roughness throughout an outer shell of a device (e.g., a streamer) used underwater for seismic surveys, by applying various substances that fill micro-cracks, are easy to polish or are self-healing. Apparatuses used to implement these methods may be used shortly before the devices are deployed in water, for example, having the device passing through such an apparatus as it is moved to be deployed in water. | 08-28-2014 |
20140241123 | SYSTEM AND METHOD FOR LOCATING AND POSITIONING SEISMIC SOURCE - A source array generates seismic waves in water during a marine seismic survey. The source array includes a first sub-array including plural source elements; plural acoustic transceivers distributed along the first sub-array; a positioning system; a primary position control device configured to control a position of the first sub-array; and a secondary position control system configured to adjust a depth of the first sub-array. | 08-28-2014 |
20140241122 | ACTIVATION ELECTRONICS AND METHOD FOR SEISMIC EQUIPMENT RECOVERY DEVICE - An activation module to be used in a seismic equipment recovery device. The activation module includes a processor; a pressure transducer configured to measure a pressure of the ambient and provide the measured pressure to the processor; a memory connected to the processor and configured to store information related to a pressure or depth threshold; and a communication unit connected to the memory and configured to exchange information with an external device. The processor is configured to send a deployment instruction to an inflation mechanism to inflate a flotation bag based on the measured pressure and the stored information. | 08-28-2014 |
20140241121 | SYSTEMS AND METHODS FOR IMPROVING THE EFFICIENCY OF HYDROGENERATORS - Systems and methods are provided for generating power by a hydrogenerator which can be attached to a portion of a towed marine streamer. A hydrogenerator includes: a stator configured to impart a spin to water which flows through the stator, wherein the stator is inline with and fluidly coupled to a propeller; the propeller configured to receive water which has passed through the stator, wherein the propeller is connected to a generator; the propeller configured to spin; and the generator configured to output power for use by components attached to the towed marine streamer. | 08-28-2014 |
20140241120 | MARINE SEISMIC APPARATUS WITH MARINE GROWTH RETARDANT AND METHODS THEREFOR - Embodiments describe methods, devices and systems for marine seismic surveying which prevent or inhibit marine growth thereon. Towed seismic array elements which can become fouled given their presence in the water for extended time periods are coated with a hydrophobic coating, e.g., a superhydrophobic nanocoating applied manually via an aerosol can or brush. Application of the hydrophobic coating can be performed on board the towing vessel, or even potentially in the water. | 08-28-2014 |
20140241118 | COMBINED WIDE AND NARROW AZIMUTH SEISMIC DATA ACQUISITION SYSTEM AND METHOD - There is a method for acquiring seismic data over a survey area. The method includes deploying streamer and source vessels to acquire seismic data along a survey line; performing one pass with the streamer and source vessels along the survey line for collecting wide azimuth (WAZ) data; and performing another pass with the streamer and source vessels along the survey line for collecting narrow azimuth (NAZ) data. | 08-28-2014 |
20140241116 | VIBRATOR SOURCE ARRAY LOAD-BALANCING METHOD AND SYSTEM - Method and controller for finding a best distribution of source elements that form a vibratory source array. The method includes inputting plural constraints for the source elements; generating plural distributions of the source elements that fulfill the plural constraints; calculating for each distribution a first attribute characterizing the source array; and selecting the best distribution from the plural distributions based on a value of the first attribute. | 08-28-2014 |
20140238773 | METHOD AND SYSTEM FOR PNEUMATIC CONTROL FOR VIBRATOR SOURCE ELEMENT - Method, source array and source element that generate seismic waves. The source element includes an enclosure having an opening covered by a piston; a local supply accumulator fluidly communicating with an interior of the enclosure, a pressure of the fluid inside the local supply accumulator being larger than a pressure of the fluid inside the enclosure; a local supply valve located between the local supply accumulator and the enclosure and configured to control a flow of the fluid from the local supply accumulator to the interior of the enclosure; and a controller configured to control the local supply valve such that the pressure inside the enclosure does not fall below a first preset value based upon an ambient pressure of the enclosure while seismic waves are generated. | 08-28-2014 |
20140238771 | MARINE ACOUSTIC PROJECTOR PISTON FOR VIBRATOR SOURCE ELEMENT AND METHOD - There is a method for determining a shape and structure of a piston for a vibratory seismic source element. The method includes generating a cost function J that is function of plural variables; applying plural constraints to the cost function J; calculating a piston shape and piston design that fulfills the plural constraints; and modifying the calculated piston shape and piston design based on practical implementations of the vibratory source element. | 08-28-2014 |
20140204707 | METHOD AND DEVICE FOR CONTROLLING SOURCE ARRAY GEOMETRY - Methods related to controlling a source array while performing a seismic survey to achieve an intended source signature. A current three dimensional arrangement of the individual seismic sources is compared with a target 3D arrangement. In view of the comparison, position of at least one of the individual seismic sources is adjusted so that the adjusted 3D arrangement of the individual seismic sources to substantially match the target 3D arrangement. | 07-24-2014 |
20140204706 | FAST FASTENING ANTIFOULING TAPE OR SUBSTRATE USEABLE IN MARINE SEISMIC SURVEYS - A streamer usable underwater for a marine seismic survey has a portion adjacent to a protuberance covered by an adhesive antifouling tape or substrate. The tape, which may be made of copper or copper alloy is configured to be fast fastened, may be applied when the streamer is deployed and may be covered by a protective jacket during recovery. | 07-24-2014 |
20140204705 | FOLDABLE WING BIRD FOR MARINE SEISMIC SURVEY SYSTEMS - A bird for a streamer or source of marine seismic survey system has a body configured to be attached to the streamer or source, and a wing connected to the body and having an active surface used to control depth and/or lateral position of the body. The wing is configured to be changed between an operational state in which the active surface is extended away from the body, and a folded state in which the active surface is folded close to the body. | 07-24-2014 |
20140204701 | APPARATUS AND METHOD FOR DETERMINATION OF FAR-FIELD SIGNATURE FOR MARINE SEISMIC VIBRATOR SOURCE - Computing device, system and method for calculating a far-field signature of a vibratory seismic source. The method includes determining an absolute acceleration of a piston of the vibratory seismic source while the vibratory seismic source generates a seismic wave; calculating, based on the absolute acceleration of the piston, a far-field waveform of the vibratory seismic source at a given point (O) away from the vibratory seismic source; and cross-correlating the far-field waveform with a driving pilot signal of the vibratory seismic source to determine the far-field signature of the vibratory seismic source. | 07-24-2014 |
20140202263 | SYSTEM FOR REAL-TIME DEFLECTOR MONITORING AND RELATED METHODS - A real time deflector monitoring system related to a deflector used in a seismic survey system is provided. The system includes a bridle block configured to connect the deflector to a first rope. The system further includes sensors embedded in the bridle block and configured to measure strength and direction of a tension in at least one of (A) the first rope and/or (B) one of rig ropes connecting the deflector to the bridle block. The system also includes a motion detector configured to acquire information related to deflector's motion. | 07-24-2014 |
20140200819 | HIGH-FIDELITY ADAPTIVE CURVELET DOMAIN PRIMARY-MULTIPLE SEPARATION PROCESSING OF SEISMIC DATA - Methods and systems for separating multiple events from primary events in noisy seismic data are described. Multiples are predicted and then the predictions are improved by least-square matching filtering in the space and time domain. An adaptive curvelet domain separation (ACDS) is then performed and the ACDS equation is solved with an iterative soft-thresholding technique. Further processing can be added to compensate for prediction inaccuracy or variable/excessive seismic data noise by dividing the seismic data into predetermined bands and processing each band independently. | 07-17-2014 |
20140200817 | SEISMIC DATA PROCESSING INCLUDING DATA-CONSTRAINED SURFACE-CONSISTENT CORRECTION - Methods and systems for constraining surface consistent amplitude corrections are described. An amplitude map generated from pre-stack or post-stack seismic data can constrain, through the bin term, the surface consistent inversion. The methods and systems provide a solution to correct for wavelength and regional anomalies associated with heterogeneous near surface or buried velocity variations above the target horizon. The methods and systems can be used for 2D, 3D, 4D surveys or for a merge of different surveys. | 07-17-2014 |
20140200815 | SEISMIC DATA PROCESSING INCLUDING TRUE-AZIMUTH THREE-DIMENSIONAL INTERNAL MULTIPLE ATTENTUATION WITHOUT SUBSURFACE INFORMATION - A system and method are provided for substantially eliminating an influence of true-azimuth three dimensional (3D) internal multiple reflections in determining undersea geography in a geographical area of interest without a priori knowledge of subsurface information. The system and method define a set of upper windows that include a geographical area of interest, and a pair of lower windows that are below the set of upper windows, define a first set of apertures and a second set of apertures, segment seismic data to each of the windows using the first and second sets of apertures, and determine a total internal 3D multiple model based on an iteratively generated internal 3D multiple model using the segmented seismic data. | 07-17-2014 |
20140200813 | SYSTEMS AND METHODS FOR SEISMIC DATA PROCESSING USING KINEMATIC ANALYSIS OF SOURCE-RECEIVE MIGRATION ADCIGS - Systems and methods are provided for determining a starting position and direction of a ray for use in generating a velocity model based at least in part on a kinematic analysis of Angle Domain Common Image Gathers (ADCIGs) obtained by a Wave Equation Migration (WEM) process. A method includes: determining a migrated spatial dip from a stack; determining a slope of a residual move-out (RMO); remapping a migrated value into a first value; repositioning the starting position of the ray based at least in part on the migrated spatial dip from the stack, the slope of the RMO and the first value; and computing the starting direction of the ray. | 07-17-2014 |
20140198613 | SYSTEM AND METHOD FOR THE REMOVAL OF SHALLOW WATER MULTIPLES USING A HYBRID MULTI-CHANNEL PREDICTION METHOD - A system and method are provided for determining shallow water multiples when seismically exploring a geographical area of interest under a body of water. The system and method estimate a multi-channel prediction operator F using a model of water layer related multiples with respect to received and stored seismic data, estimate a travel time of the transmitted seismic wavelets from the one or more sources to each of the plurality of receivers, and then generate water layer primary reflections models using the estimated travel time and Green's function. The system and method then merge the generated water layer primary reflections models with the multi-channel prediction operator F to create a hybrid multi-channel prediction operator F | 07-17-2014 |
20140198611 | TOWED STREAMER ACQUISITION WITH VARIABLE SPATIAL RESOLUTION - Methods and systems for performing a single pass multi-density seismic acquisition are described. A single pass multi-density seismic acquisition includes a plurality of different length streamers towed by one or more streamer vessels. The different length streamers are configured to provide different streamer (receiver) density zones from a highest density to lowest density from the least offset to the greatest offset of the streamers. The different density zones provide for optimized data associated with multiples rejection, imaging and model building/full waveform inversion. | 07-17-2014 |
20140198608 | MULTI-LEVEL SEISMIC SOURCE AND METHOD - A depth-varying marine acoustic source array is configured for generating an acoustic wave in a body of water. The depth-varying marine acoustic source array includes a float; plural source points connected to the float through corresponding cables; and a housing extending from a first source point to a last source point, the housing including plural segments. The at least one segment is configured to withstand bending. | 07-17-2014 |
20140198605 | WAVEFIELD MODELLING AND 4D-BINNING FOR SEISMIC SURVEYS FROM DIFFERENT ACQUISITION DATUMS - A method for maximizing a repeatability between a base seismic survey and a monitor seismic survey of a same surveyed subsurface during a 4-dimensional (4D) project. The method includes receiving first seismic data associated with the base seismic survey; receiving second seismic data associated with the monitor seismic survey, wherein the monitor seismic survey is performed later in time than the base seismic survey; estimating subsurface reflection-points and incidence angles; determining 4D-binning based on the estimated subsurface reflection-points and incidence angles; and maximizing the repeatability between the first seismic data and the second seismic data by using the 4D-binning. | 07-17-2014 |
20140196653 | TAILBUOY STABILIZATION DEVICE AND METHOD - Devices and methods for stabilizing a tailbuoy attached to a streamer towed during a marine survey are provided. The tailbuoy includes a floating body configured to be connected to the streamer, and a keel attached to the floating body. The keel is configured to stabilize a motion of the tailbuoy along a towing direction while in a working state, and to be switched between the working state in which the keel is partially submerged and a retracted state in which the keel is removed from water. | 07-17-2014 |
20140195162 | DEVICE AND METHOD FOR DE-BLENDING SIMULTANEOUS SHOOTING DATA - A device, medium and method for de-blending seismic data associated with a subsurface of the earth. The method includes a step of receiving seismic data “d” recorded with one or more land receivers, wherein the seismic data includes shot recordings generated by plural sources that are simultaneously actuated; a step of forming either a continuous receiver trace or trace segments from the received seismic data; a step of selecting plural overlapping spatial blocks that cover the surface shot locations; a step of assigning the shot recordings to the plural overlapping spatial blocks; a step of applying a mathematical technique to the recordings to determine de-blended data; and a step of generating an image of the subsurface based on the de-blended data. | 07-10-2014 |
20140188395 | SYSTEM AND METHOD FOR REMOVAL OF JITTER FROM SEISMIC DATA - A system and method are provided for reducing jitter in collected seismic data. The collected seismic data includes both original seismic data, e.g., original traces, and other seismic data, e.g., interpolated traces. The collected seismic data is filtered to form filtered seismic data, and then the original seismic data is re-inserted into the filtered seismic data. Filtering is repeated on the result based, for example, on one or more filter thresholds that progressively relax constraints on the filtering process, until the filtered data can be combined with the original seismic data with a good fit or a predetermined, e.g., user determined, number of times. | 07-03-2014 |
20140177387 | MARINE SEISMIC SURVEYS USING CLUSTERS OF AUTONOMOUS UNDERWATER VEHICLES - A seismic survey system records seismic signals during a marine seismic survey. The system includes first and second clusters, each including a set of autonomous underwater vehicles (AUVs); each cluster being associated with a corresponding first or second unmanned surface vehicle (USV); and a central control unit located on a floating platform and configured to control the first and second USVs. The first USV follows its own path and the first cluster follows the first USV independent of the second USV or the second cluster. | 06-26-2014 |
20140177386 | VOLUMETRIC AND NON-VOLUMETRIC SOURCES-BASED SEISMIC SURVEY AND METHOD - A seismic survey system for surveying a subsurface. The system includes a volumetric land source buried underground for generating P-waves; a non-volumetric land source buried underground for generating P- and S-waves; plural receivers distributed about the volumetric and non-volumetric land sources and configured to record seismic signals corresponding to the P- and S-waves; and a controller connected to the volumetric land source and the non-volumetric land source and configured to shot them in a given pattern. | 06-26-2014 |
20140177385 | METHOD AND DEVICE TO DEGHOST SEISMIC DATA - A method for processing seismic data related to a structure under a body of water to generate an image of the structure includes receiving seismic data acquired using detectors disposed on a depth-varying profile streamer. The method further includes generating, from the seismic data, first traces that correspond to traces as recorded by the detectors and migrated to water surface, and second traces that correspond to traces as would be recorded by virtual detectors mirroring the detectors relative to the water surface and migrated to water surface. The method also includes generating third traces as a sum of corresponding ones among the first traces and second traces, and fourth traces as a difference of the corresponding ones of the first and second traces. The method then includes deghosting at least one of the first and second traces using positive and negative polarity portions of the third and fourth traces. | 06-26-2014 |
20140172308 | REPEATABILITY INDICATOR BASED ON SHOT ILLUMINATION FOR SEISMIC ACQUISITION - Methods and systems for similarity indicator calculation associated with seismic data acquisition are described. A similarity indicator value can, for example, be based on a normalized partitioned intensity uniformity (PIU) metric. In another aspect, shot imprints are compared by mapping a base (reference) shot imprint onto a current sample of a shot imprint before calculating the similarity indicator value. The similarity indicator value is associated with the shot imprint location used in the calculation and allows re-shooting of only the areas where an insufficient quality of shot data is detected based on a preconfigured threshold value for the similarity indicator. | 06-19-2014 |
20140172307 | TARGET-ORIENTED 4D BINNING IN COMMON REFLECTION POINT - Methods and systems for target oriented 4D binning of seismic data are presented. A target depth horizon is selected in the vicinity of where 4D changes are expected. Respectively for each data vintage, relationships between the seismic traces and reflection bins, associated with the depth surface, are established and the seismic traces are divided into common reflection angle subsets. The best matching traces from both vintages are selected for each reflection bin and output for further processing. | 06-19-2014 |
20140169132 | METHOD AND DEVICE FOR DETERMINING FREQUENCY SWEEP FOR SEISMIC SOURCE - Controller and method for generating a frequency sweep for a seismic survey that uses a seismic source. The method includes receiving specification data about the seismic source; receiving environmental data about an infrastructure affected by the seismic survey; receiving guideline data about the infrastructure; setting a target energy spectrum density to be emitted by the seismic source during the seismic survey; and calculating, in a processor, the frequency sweep based on the specification data, environmental data, guideline data and the target energy spectrum density. | 06-19-2014 |
20140169126 | METHOD AND DEVICE FOR MARINE SEISMIC ACQUISITION - Method and system for improving offset/azimuth distribution. The system includes plural streamers towed by a streamer vessel; a central source towed by the streamer vessel; first and second front sources located in front of the plural streamers along a traveling direction of the streamer vessel; and first and second large offset front sources located in front of the first and second front sources along the traveling direction. The offset distance between the first and second large offset front sources, along a cross-line direction, is larger than an offset distance between the first and second front sources. | 06-19-2014 |
20140165694 | METHODS AND SYSTEMS FOR QUALITY CONTROL OF SEISMIC ILLUMINATION MAPS - Methods and systems for quality control of seismic data illumination map generation are described. The quality control is based on determined fold differences calculated using the actual position of the sources and receivers in the determination of the seismic illumination. In another aspect, sub-surface complexity is considered in preparing a map of seismic illumination. The seismic data illumination map can be evaluated in real-time onboard a seismic vessel and included as part of an infill reshoot decision making/quality control process. | 06-19-2014 |
20140153360 | HEAD-FLOAT AND METHOD - Method and streamer/source head-float system for connecting to a head portion of a streamer or to a lead-in or providing information about a source. The system includes a head-buoy configured to float in water and connected through a cable to the head portion of the streamer or to the lead-in; a head-float configured to float in water; a connector connecting the head-float to the head-buoy; and positioning equipment attached to the head-float and configured to determine a position of the streamer or the source. | 06-05-2014 |
20140140170 | JET-PUMP-BASED AUTONOMOUS UNDERWATER VEHICLE AND METHOD FOR COUPLING TO OCEAN BOTTOM DURING MARINE SEISMIC SURVEY - An autonomous underwater vehicle (AUV) is configured to record seismic signals during a marine seismic survey. The AUV includes a body having a base (B) and first and second sides (A, C), the body having a head part and a tail part; a propulsion system for guiding the AUV to a final target on the ocean bottom; jet pumps connected to corresponding nozzles on the first and second sides (A, C); a control device connected to the jet pumps; and a seismic sensor configured to record seismic signals. The jet pumps are actuated by the control device in a given sequence so that the base (B) penetrates into the ocean bottom. | 05-22-2014 |
20140133272 | DEVICE AND METHOD FOR CONTINUOUS DATA ACQUISITION - Method for generating an excitation signal for a first vibratory seismic source so that the first vibratory seismic source is driven with no listening time. The method includes a step of determining a first target spectrum for the first vibratory seismic source; a step of setting a first group of constraints for the first vibratory seismic source; and a step of generating a first excitation signal for the first vibratory seismic source based on the first group of constraints and the first target spectrum. The first seismic traces recorded with plural receivers can be identified when the first vibratory seismic source is driven with no listening time, based on the first excitation signal. | 05-15-2014 |
20140126781 | SPATIAL EXPANSION SEISMIC DATA PROCESSING METHOD AND APPARATUS - A method for processing seismic data may include receiving input seismic data (d | 05-08-2014 |
20140112097 | VARIABLE-DEPTH SEISMIC SOURCE AND METHOD - Method and marine acoustic source array for generating an acoustic wave in a body of water. The marine acoustic source array includes at least one sub-array. The at least one sub-array includes a float from which plural source points are attached. The source points may be provided on a curved line, straight line, or other desired shape so that a variable-depth source is obtained with a single float. The source points may be divided into groups and the groups may be provided on the curved line, straight line or other desired shape. | 04-24-2014 |
20140112096 | DYNAMICALLY-ADJUSTED VARIABLE-DEPTH SEISMIC SOURCE AND METHOD - Method and dynamically-adjusted marine acoustic source array for generating an acoustic wave in a body of water. The acoustic source array includes a float; plural actuation devices, each actuation device having corresponding cables; and plural source points connected to the float through the corresponding cables. The plural actuation devices dynamically adjust corresponding lengths of the corresponding cables to achieve a desired variable-depth profile for the plural source points. | 04-24-2014 |
20140109818 | KNUCKLE DEFLECTOR FOR MARINE SEISMIC SURVEY SYSTEM - Deflectors configured to be attached to cables towed behind a vessel for performing a marine survey and associated methods are provided. A deflector has a body including a wing portion and a knuckle portion. The wing portion has substantially flat wings extending away from a position where the body is attached to the cable. The knuckle portion is configured to attach the wing portion to the cable so that the wing portion remains able to rotate about three rectangular axes while being towed underwater. | 04-24-2014 |
20140107930 | PLURAL DEPTH SEISMIC SOURCE SPREAD METHOD AND SYSTEM - A method for acquiring and improving seismic data includes activating a first seismic source located below a geophysical surface at a first depth and a second seismic source located below the geophysical surface at a second depth, wherein the second depth is below the first depth, acquiring seismic data with a seismic receiver in conjunction with activating the first seismic source and the second seismic source, and aligning primary reflections within the seismic data to provide improved seismic data. The method may also include determining changes to the regions below the second depth by comparing improved seismic data corresponding to a first acquisition event with improved seismic data corresponding to a second acquisition event. A corresponding system is also disclosed herein. | 04-17-2014 |
20140095079 | SYSTEM AND METHOD FOR THREE-DIMENSIONAL ITERATIVE FILTERING OF SCATTERED WAVES IN CROSS SPREAD SEISMIC SYSTEMS - A system and method are provided for filtering scatterer noise energy from land seismic waves using three dimensional (3D) iterative filtering in a cross-spread source-receiver pattern. The system and method isolate scatterer noise energy associated with a scatterer based on a filtering process performed using a scatterer referential time delay. Then, the isolated scatterer noise energy can be subtracted from the surface wave data. This process can be repeated for each scatterer in the covered area to remove each of their contributions, and can be performed, for example, after a preliminary filtering of the surface wave data using 3D fk filtering or the like. | 04-03-2014 |
20140086012 | VOLUMETRIC PIEZOELECTRIC SEISMIC WAVE SOURCE AND RELATED METHODS - Seismic wave sources and related methods are provided. A seismic wave source includes a housing, plural pillars and an excitation system. The housing is split in two halves along a plane including a longitudinal axis of the housing. The plural pillars are made of piezoelectric elements and are positioned inside the housing to have one end in contact with a semi-cylindrical middle portion of one half of the housing and another end in contact with a semi-cylindrical middle portion of the other half of the housing. The excitation system connected by wires to the plural pillars and is configured to provide electrical signals to the piezoelectric elements. Upon receiving the electrical signals from the excitation system, the pillars generate forces on the housing thereby generating seismic waves. | 03-27-2014 |
20140081576 | MIXED SEQUENTIAL AND SIMULTANEOUS SOURCE ACQUISITION AND SYSTEM - Systems and methods for acquiring blended and unblended seismic data during a single seismic survey. The blended and unblended seismic data is generated with a plurality of sources that are fired in a dedicated sequence. The sequence involves firing all the sources at a first time, advancing the sources along a given path, firing only a first source at a second time, later than the first time, advancing the sources, firing again all the sources at a third time, later than the second time, advancing the sources, firing only a second source at a fourth time, later than the third time, and so on until a desired subsurface is fully surveyed. | 03-20-2014 |
20140078862 | STREAMER SPREAD WITH REDUCED DRAG - A method and a marine front-end gear for connecting a set of streamers to a towing vessel. The front-end gear includes ropes for connecting a first sub-set of streamers to the vessel; lead-ins for connecting a second sub-set of streamers to the vessel; and a back loop cable electrically connected between tails of first and second adjacent streamers. The first streamer belongs to the first sub-set of streamers and the second streamer belongs to the second sub-set of streamers, and streamers of the first sub-set are interspersed with streamers of the second sub-set. | 03-20-2014 |
20140078860 | INTERFERENCE NOISE ATTENUATION METHOD AND APPARATUS - A method for determining interference noise recorded in a first seismic survey of a subsurface generated by a source in a second seismic survey. The method includes receiving seismic data recorded by seismic sensors of the first seismic survey, wherein the seismic data includes seismic waves that originate from the first seismic survey and seismic waves that originate from the second seismic survey; receiving actual relative shooting timing or actual shooting timing of seismic sources of the first and second seismic surveys; applying a processing algorithm to the seismic data to calculate the interference noise, wherein the processing algorithm that takes into consideration the actual relative shooting timing or the actual shooting timing of the seismic sources; and generating a final image of the subsurface based on the recorded seismic data from which the interference noise is subtracted. | 03-20-2014 |
20140064027 | HORIZONTAL STREAMER BROADBAND MARINE SEISMIC ACQUISITION CONFIGURATION AND PROCESSING - A method for de-ghosting marine seismic trace data is described. A reference seismic trace and a candidate seismic trace are selected from acquired seismic data. The acquired seismic data is gathered using a configuration wherein either a first streamer and a second streamer are disposed at different depths relative to one another and are laterally offset relative to one another, or using a configuration wherein a first source and a second source are disposed at different depths relative to one another and are laterally offset from one another. The reference seismic trace and the candidate seismic trace are processed, e.g., to perform normal moveout correction and/or vertical datum shifting, and the processed reference seismic trace is de-ghosted using the processed, candidate seismic trace. | 03-06-2014 |
20140056102 | PATCH MICROSEISMIC ARRAY AND METHOD - Device and method for locating a microseismic event taking place in a subsurface of the earth. The method includes receiving a location of a well; identifying inaccessible locations for seismic receivers on a surface next to the well; distributing patches of the seismic receivers on the surface above the well, and around the inaccessible locations; and recording seismic data with the seismic receivers. | 02-27-2014 |
20140056100 | BUOY BASED MARINE SEISMIC SURVEY SYSTEM AND METHOD - A seismic survey system for recording seismic data underwater. The system includes first plural buoys configured to descend to a first predetermined depth (H | 02-27-2014 |
20140053768 | AUTONOMOUS UNDERWATER VEHICLE FOR MARINE SEISMIC SURVEYS - An autonomous underwater vehicle (AUV) for recording seismic signals during a marine seismic survey. The AUV includes a body extending along an axis X and having a head portion, a middle portion, and a tail portion, wherein the middle portion is sandwiched between the head portion and the tail portion along the X axis; a cross-section of the middle portion, substantially perpendicular on the X axis, having a triangular-like shape; the head portion including a base portion having the triangular-like shape and configured to match the middle portion; the head portion having a tip that, when projected along the X axis on the base portion, substantially coincides with a centroid of the base portion having the triangular-like shape; and a seismic payload located within the body and configured to record seismic signals. | 02-27-2014 |
20140050047 | METHOD AND DEVICE TO ACQUIRE SEISMIC DATA - Streamer and method for deploying the streamer for seismic data acquisition related to a subsurface of a body of water. The method includes a step of releasing into the body of water, from a vessel, a body having a predetermined length together with plural detectors provided along the body; a step of towing the body and the plural detectors such that the plural detectors are submerged; and a step of configuring plural birds provided along the body, to float at a predetermined depth from a surface of the water such that a first portion of the body has a curved profile while being towed underwater. | 02-20-2014 |
20140043937 | ADAPTIVE SWEEP METHOD AND DEVICE FOR SEISMIC EXPLORATION - Controller and method for adapting a frequency sweep for a vibro-acoustic source element that is configured to generate acoustic waves during a seismic survey. The method includes driving a seismic source element to generate a current frequency sweep; recording seismic data with plural seismic sensors in response to the current frequency sweep; selecting, during the seismic survey, a data subset of the seismic data, wherein the data subset has a size less than 10% of the seismic data; calculating with a processing device an attribute based on the data subset; and calculating a new frequency sweep based on the attribute. | 02-13-2014 |
20140043935 | HYPERBOLIC SHOOTING METHOD AND DEVICE - During a seismic survey, shots located close to one another are fired at a time interval shorter than an echo time interval and longer than a closest receiver time interval. During the echo time interval which follows a first shot, receivers located within a predetermined distance from the first shot location detect seismic reflections related to the first shot. During the closest-receiver time interval which follows the first shot, at least one seismic receiver located closest to the first shot location detects all the reflections from the first shot reaching this seismic receiver. | 02-13-2014 |
20140041455 | 4C SLIP-SHOOTING METHOD AND DEVICE - During a marine seismic survey, shots are fired at a time interval shorter than an S-wave listening time during which seismic receivers within a predetermined distance from the shot location detect reflected S-waves caused by an earlier shot. In portion of data acquired during the survey, information related to the S-wave reflections caused by the earlier shot is blended with information related to P-wave and S-wave reflections from a later shot. | 02-13-2014 |
20140041450 | ANTIFOULING REMOVABLE STREAMER SECOND SKIN AND METHOD OF MOUNTING THEREOF - A streamer usable underwater for marine seismic surveys is covered by a removable skin to prevent bio-fouling deposits on its outer surface. The removable skin includes a flexible material charged with a biocide substance or has foul release properties, and a closure system configured to join sides of the flexible material. The removable skin may be mounted onboard of a vessel, while the streamer is deployed. | 02-13-2014 |
20140033962 | STREAMER COATING DEVICE AND METHOD - Method and device for cleaning a marine seismic equipment. The device includes a body, a propulsion system for moving along the streamer, a cleaning device for cleaning the equipment, and a control device for controlling a movement of the device. | 02-06-2014 |
20140016435 | ACQUISITION SCHEME FOR VIBROSEIS MARINE SOURCES - Control mechanisms, computer software and methods for driving vibrational source arrays underwater. An incoherent acquisition scheme drives individual source elements simultaneously and incoherently while a coherent acquisition scheme drives high-frequency individual source elements simultaneously and incoherently and low-frequency individual source elements simultaneously and coherently. Thus, denser coverage and an increased energy input is achieved for the source arrays. | 01-16-2014 |
20140003197 | SYSTEM AND METHOD FOR DETERMINING A FREQUENCY SWEEP FOR SEISMIC ANALYSIS | 01-02-2014 |
20130329519 | ACTIVELY CONTROLLED BUOY BASED MARINE SEISMIC SURVEY SYSTEM AND METHOD - A buoy for recording seismic signals while underwater. The buoy includes a body; a buoyancy system configured to control a buoyancy of the body to descend to a predetermined depth (H | 12-12-2013 |
20130322207 | METHOD AND DEVICE TO ACQUIRE MARINE SEISMIC DATA - The invention concerns a method to acquire seismic waves by means of a streamer towed by a vessel and comprising a plurality of seismic receivers. The streamer comprises a head portion that is slanted relative to the water surface and a tail portion having at least one section with a different slant. | 12-05-2013 |
20130322206 | BUOY BASED MARINE SEISMIC SURVEY SYSTEM AND METHOD - A seismic survey system for recording seismic data underwater in the presence of underwater currents. The system includes first plural buoys configured to descend in water at a predetermined depth (H | 12-05-2013 |