METHOD FOR DETERMINATION OF THREE-DIMENSIONAL SPATIAL DISTRIBUTION OF POROSITY IN SAMPLE OF UNUNIFORM POROUS MEDIUM Russian patent published in 2022 - IPC G01N23/83 G01N33/24 G06T15/04 

FIELD: analysis.

SUBSTANCE: invention relates to the field of technologies of studying properties of ununiform porous media, namely to methods for obtaining images and analysis of porosity of a sample of an ununiform porous medium. A method for determination of three-dimensional spatial distribution of porosity in a sample of an ununiform medium is claimed, in accordance to which: 3D image of a sample microstructure is obtained using a method for obtaining 3D images of a microstructure, the general porosity of the sample is measured, 3D map of minerals included in the sample is obtained, which is an image of the sample microstructure, in which each point is interpreted as a specific mineral. Then, using obtained 3D image of the microstructure and 3D map of minerals, values of physical quantities are determined, which correspond to completely empty voxels, which corresponds to the absence of a mineral phase in the corresponding volume of a sample, and completely solid voxels, which corresponds to the absence of pores inside a cell of each mineral, the obtained 3D image of the microstructure is normalized using physical quantities determined for each mineral, corresponding to completely empty and completely solid voxels, obtaining a normalized 3D image, using the measured general porosity, values are determined, which correspond on the normalized 3D image of the microstructure to completely empty and completely solid voxels, in such a way that porosity obtained as a result corresponds to the measured one, thereby determining the dependence of the value of inner porosity in the voxel on the value of quantity on the normalized 2D image, and, using the normalized 3D image of the microstructure and the resulting dependence of the value of inner porosity in the voxel on the value of quantity on the normalized 3D image, using a computer device, three-dimensional spatial distribution of porosity in a sample is created, taking into account inner porosity of voxels.

EFFECT: reduction in negative effects related to unresolved porosity, which, in turn, reduces the probability of errors in subsequent technological processes based on 3D distribution of porosity in a sample, as well as expansion of the field of application.

30 cl, 8 dwg