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Method for producing a three-dimensional characteristic model of a porous material sample for analysis of permeability characteristics

A technology of porous materials and three-dimensional features, which is used in the research field of porous materials and media properties to achieve the effect of improving accuracy, accuracy and reliability

Inactive Publication Date: 2015-09-02
OBSCHESTVO S OGRANICHENNOY OTVETSTVENNOSTIU INTROVISION RESERCH & DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, core samples typically degrade—disintegrate or deteriorate—over time, presenting a significant shortcoming of traditional core analysis experimental studies

Method used

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  • Method for producing a three-dimensional characteristic model of a porous material sample for analysis of permeability characteristics
  • Method for producing a three-dimensional characteristic model of a porous material sample for analysis of permeability characteristics
  • Method for producing a three-dimensional characteristic model of a porous material sample for analysis of permeability characteristics

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Embodiment Construction

[0035] In the description of the present invention, as an example, the claimed technique is applied to a cylindrical core sample. This clearly cannot be considered as limiting the possible application of the claimed method in any other design and form of porous media, including drill cuttings.

[0036] First, the core is raised to the surface through the spud process and transported to the laboratory, where it is typically sliced ​​into smaller-sized samples for microtomography studies.

[0037] Furthermore, the tomographic study of the sample is performed with sufficient resolution (necessary pixel size of the tomographic image). The result is a set of successive images of the core, each represented by pixels of a different gray scale (from pure white to pure black). Here white corresponds to the highest bulk density and black corresponds to the lowest bulk density.

[0038] The next step is to distinguish areas of uniform density in the material sample. This step can be c...

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Abstract

The present invention relates to a method for producing a three-dimensional characteristic model of a rock sample for analysis of the spatial and physical characteristics of materials subsequent to the processing of images obtained by means of computer tomography. The method includes producing a three-dimensional tomographic image of a sample of material, identifying areas where the structure of the material is homogeneous, assigning a particular material density value to each such area, assigning a particular porosity value to each pixel, assigning a particular absolute permeability value to each pixel, forming a three-dimensional characteristic model on the basis of the porosity and permeability values of each pixel, and calculating the absolute permeability of the entire sample or of a portion thereof in any direction by means of computational fluid dynamics. The technical result is an increase in the precision and reliability of data obtained regarding the permeability characteristics of a sample of porous material, without the need to employ additional financial and labor resources.

Description

field of invention [0001] The invention relates to the research field of porous materials and medium properties. More specifically, the present invention relates to a method for obtaining a characteristic three-dimensional model of a rock sample, which allows further study of its spatial physical properties based on the processing of computed tomography images. Background technique [0002] Oil and natural gas are stored at various depths in the porous rocks of the Earth's crust. One method used to study oil-producing formations is the examination of cores—cylindrical rock samples obtained during drilling. Rocks have multi-scale heterogeneous structures. Core analysis can solve many important problems in oilfield development: oil reserve evaluation, selection of recovery methods, economic evaluation of oilfield development, etc. [0003] Today, petroleum engineers are confronted with increasingly complex oil fields—carbonate formations, shale oil, etc., which require more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T19/00G01N23/04G01N15/08
CPCG01N2223/616G01N15/0826G06T17/05G01N2223/649G01N2015/0846G01N2223/419G01N23/046G01N15/088G16C99/00G06F17/10G01V20/00
Inventor E·A·格拉契夫V·G·库里克奥A·P·戈尔比克G·A·卡拉什尼科夫A·A·萨拉托夫A·V·希瓦茨伯格
Owner OBSCHESTVO S OGRANICHENNOY OTVETSTVENNOSTIU INTROVISION RESERCH & DEV
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