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Shale matrix permeability determination device and method

A matrix permeability and measurement device technology, applied in the field of shale matrix permeability measurement devices, can solve the problems of pressure drop curve error, no solution proposed, and pressure drop cannot be obtained accurately, so as to reduce measurement error and improve accuracy Effect

Active Publication Date: 2021-02-12
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

If the gas enters the particle gap in the sample chamber for too long, the pressure drop caused by the gas entering the particle cannot be accurately obtained during this period, resulting in a large error between the theoretical pressure drop curve and the actual experimentally measured pressure drop curve. Affect the accuracy of permeability determination
[0008] For the above problems, no effective solutions have been proposed so far

Method used

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  • Shale matrix permeability determination device and method
  • Shale matrix permeability determination device and method
  • Shale matrix permeability determination device and method

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Embodiment Construction

[0058] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0059] When measuring the permeability of shale matrix with the existing shale matrix permeability measuring device, the reference chamber is in a closed state and stores a certain amount of gas. After the reference chamber and the sample chamber are connected, the gas in the reference chamber expands to the sample chamber. At this time, ...

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Abstract

The invention provides a shale matrix permeability determination device and method. The device comprises a gas cylinder, a booster pump which is connected with the gas cylinder, an automatic gas supplementing and pressurizing system which is connected with the booster pump through a pressure regulating valve, and is used for supplementing and pressurizing a reference chamber and a sample chamber through gas in a gas storage tank of the booster pump under the condition that the pressure in the reference chamber and the sample chamber is identified to be smaller than a target pressure preset value in the experiment process, a temperature control device which is used for placing the reference chamber and the sample chamber used for placing a shale rock sample to be measured, and a pressure sensor which is used for measuring pressure data of the reference chamber and the sample chamber. By utilizing the scheme provided by the invention, the problem that the pressure of the whole system issharply reduced after particle gaps are filled with gas is avoided, the influence of the filling degree on permeability determination can be eliminated, the measurement error is reduced, and the accuracy of permeability determination is improved.

Description

technical field [0001] The application belongs to the technical field of geological exploration, and in particular relates to a device and method for measuring shale matrix permeability. Background technique [0002] The influence of shale gas flow mode will run through the whole process of shale gas development, and permeability, as one of the basic parameters of reservoir rock, plays an important role in the flow of shale gas, and permeability is an important Therefore, it is necessary to quantitatively measure and evaluate the permeability of shale reservoirs. [0003] Sample-based experimental determination is an important means to obtain shale permeability. At present, the testing methods of rock permeability commonly used in laboratories can be divided into steady-state method and unsteady-state method. Gas, water or kerosene can be used as the seepage medium in the permeability test. However, when water is used for permeability testing, water will hydrate with clay...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 宁正福吴小军吕方涛张文通王庆
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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