Patent application number | Description | Published |
20140328449 | METHOD FOR EXAMINING SAMPLES OF FROZEN ROCKS - A sample of frozen rocks is placed into contact with a frozen solution of an X-ray contrast agent at subzero temperature. Upon the end of saturation of the sample, a computed X-ray microtomography of the sample is conducted at a subzero temperature. The obtained microtomographic image is analyzed and spatial distribution and concentration of ice and/or gas hydrate inclusions, as well as open and closed porosity are determined. | 11-06-2014 |
20140334690 | METHOD FOR EXAMINING SAMPLES OF UNCONSOLIDATED POROUS MEDIA - A sample of an unconsolidated porous medium is frozen and at subzero temperature is placed into contact with a frozen solution of an X-ray contrast agent. Upon the end of saturation of the sample, X-ray computed microtomography of the sample is conducted at subzero temperatures and by means of analyzing the obtained computer tomograhic image, spatial distribution and concentration of ice and/or gas hydrate inclusions, open and closed porosity, pore size distribution, specific surface in the sample are determined. | 11-13-2014 |
20140376685 | METHOD FOR 3D MINERAL MAPPING OF A ROCK SAMPLE - The method for 3D mineral mapping of a rock sample comprises the steps of defining a total mineral content of a sample and calculating X-ray attenuation coefficients for the defined minerals. X-ray micro/nanoCT scanning of the sample is performed and its three-dimensional microstructure image in gray scale is obtained. Characteristic grayscale levels in the image corresponding to calculated X-ray attenuation coefficients and accordingly to the minerals are allocated and the 3D mineral map of the interior of the sample is provided. | 12-25-2014 |
20150039275 | Method for Predicting Changes in Properties of A Formation in A Near-Wellbore Area Exposed to A Drilling Mud - In order to predict properties of a formation in a near-wellbore area exposed to a drilling mud rheological properties of the drilling mud, of a filtrate of the drilling mud and of a reservoir fluid are determined. Properties of an external mudcake, porosity and permeability of the core sample are determined. A mathematical model of the external mudcake is created. The drilling mud is injected through a core sample and dynamics of pressure drop across the sample and dynamics of a flow rate of a liquid leaving the sample are determined. Using an X-ray micro Computed Tomography a profile of concentration of particles of the drilling mud penetrated into the sample is determined. A mathematical model is developed for the internal mudcake to describe dynamics of changes in concentration of the particles of the drilling mud in a pore space of the core sample. A coupled mathematical model of the internal and the external mudcakes is created and parameters of the mathematical model of the internal mudcake are determined providing matching of simulation results to the experimental data on injection the drilling mud through the core sample and to the concentration profile of the particles of the drilling mud. | 02-05-2015 |
20150107339 | METHOD FOR DETERMINING THE PROPERTIES OF POROUS MATERIALS - A sample of porous material is placed in a calorimeter cell and a pressure in the cell is increased starting from a pressure value of a first step by filling the cell with a wetting fluid. Measurements are taken of a heat flow to the cell and a fluid volume at each step. Then, the pressure in the cell is decreased to the pressure value of a first step with continued measurements of the heat flow to the cell. Increase and following decrease of the fluid pressure in the cell are repeated at least once. Then a temperature in the cell is decreased below a wetting fluid crystallization point. Once the fluid has been fully crystallized in sample pores, the temperature in the cell is increased above a wetting fluid melting point. Wetting limiting angle of the pores filled with fluid, and pore sizes are determined based on the results of heat flow measurements with due consideration of heat effect of fluid compression. | 04-23-2015 |
20150262417 | METHOD FOR BUILDING A 3D MODEL OF A ROCK SAMPLE - A method for building a 3D model of a rock sample comprises performing X-ray micro/nanoCT scanning of a rock sample and obtaining its initial three-dimensional microstructure image in a gray scale. Then, an analysis of the obtained three-dimensional image of the rock sample is performed and a binarization method is selected in dependence of the image quality and properties of the rock sample. The selected binarization method is at least once applied to the obtained initial three-dimensional image of the sample. Obtained 3D binarized image represents a 3D model of the rock sample. | 09-17-2015 |