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Method and device for testing permeability of overburden pressure matrix ofrock core

A matrix permeability and testing device technology, applied in the field of geological testing, can solve the problems of inability to measure the matrix permeability of rock core overburden

Pending Publication Date: 2021-05-25
NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the overburden pulse permeability (or apparent permeability) of the core can be measured by the overburden porosimeter, but the overburden matrix permeability of the core cannot be measured yet.

Method used

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  • Method and device for testing permeability of overburden pressure matrix ofrock core
  • Method and device for testing permeability of overburden pressure matrix ofrock core
  • Method and device for testing permeability of overburden pressure matrix ofrock core

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Embodiment Construction

[0030] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0031] The embodiment of the present application provides a test method and test device for the permeability of the rock core overburden matrix, wherein the test method may not depend on the test device, that is, using the realization principle of the test method, other practicable methods may also be used. test device. If the test method adopts the test device of the present application, its implementation effect will be better. In the embodiment of the present application, in order to facilitate the understanding of the test method and the test device, the test method is introduced first, and then the test device is introduced in conjunction with the test method.

[0032] Please refer to figure 1 , is a flow chart of the test method for the permeability of the core overburden matrix provided in ...

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Abstract

The invention provides a method and device for testing permeability of an overburden pressure matrix of a rock core. The method for testing the permeability of the overburden pressure matrix of the rock core comprises the steps of controlling the pressure around the rock core to be tested to be target pressure (simulated formation pressure); extracting gas in the rock core to be tested; introducing testing gas with preset pressure into the rock core to be tested, and in the process of introducing the testing gas, collecting pressure change information of the rock core to be tested; and determining the matrix permeability of the rock core to be tested under the simulated formation pressure condition according to the pressure change information. The testing method is used for testing the permeability of the overburden pressure matrix of the rock core.

Description

technical field [0001] The present application relates to the technical field of geological testing, in particular to a method and device for testing the permeability of rock core overburden matrix. Background technique [0002] Permeability is an important petrophysical property, including apparent permeability and matrix permeability. Matrix permeability represents the ability of fluid release in porous media, and is an important technical parameter in the process of shale gas exploitation. [0003] At present, the overburden pulse permeability (or apparent permeability) of rock cores can be measured by overburden porosimeters, but the overburden matrix permeability of rock cores cannot be measured yet. Contents of the invention [0004] The purpose of the embodiment of the present application is to provide a method and device for testing the permeability of the overburden matrix of the rock core, so as to test the permeability of the overburden matrix of the rock core....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/082
Inventor 孙泽祥李靖周世新
Owner NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS