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A method, device and system for detecting shale gas diffusion capacity

A technology of diffusion capacity and detection method, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of inapplicable shale matrix rock flow capacity evaluation and other problems, and achieve the effect of accurate evaluation results.

Active Publication Date: 2018-05-08
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that the conventional method for evaluating the flow ability of rock blocks is not suitable for the evaluation of the flow ability of shale matrix rock blocks, the embodiment of the present invention provides a method, device and system for detecting the diffusion ability of shale gas

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  • A method, device and system for detecting shale gas diffusion capacity
  • A method, device and system for detecting shale gas diffusion capacity
  • A method, device and system for detecting shale gas diffusion capacity

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Embodiment 1

[0052]The embodiment of the present invention provides a method for detecting the diffusion capacity of shale gas, see figure 1 , the method flow includes:

[0053] In step S11, the data of the shale sample is acquired, and the data of the shale sample includes: the length of the shale sample and the diameter of the shale sample.

[0054] Step S12, when the shale gas in the shale sample begins to freely diffuse from the state of adsorption equilibrium, regularly collect the cumulative diffusion gas volume of the shale gas during the free diffusion process to obtain diffusion data, the diffusion data includes: shale gas free diffusion The diffusion time of diffusion and the cumulative diffusion gas volume of shale gas corresponding to the diffusion time.

[0055] In practical applications, shale samples can be made from shale in the shale layer to be tested according to actual needs. In this embodiment, the shale sample is selected as a cylinder, and the length and diameter o...

Embodiment 2

[0064] The embodiment of the present invention provides a method for testing the diffusion capacity of shale gas, see figure 2 , the method flow includes:

[0065] In step S21, the data of the shale sample is acquired, and the data of the shale sample includes: the length of the shale sample and the diameter of the shale sample.

[0066] Step S22, when the shale gas in the shale sample begins to freely diffuse from the state of adsorption equilibrium, regularly collect the cumulative diffusion gas volume of the shale gas during the free diffusion process to obtain diffusion data, the diffusion data includes: shale gas free diffusion The diffusion time of diffusion and the cumulative diffusion gas volume of shale gas corresponding to the diffusion time.

[0067] In practical applications, shale samples can be made from shale in the shale layer to be tested according to actual needs. In this embodiment, the shale sample is selected as a cylinder, and the length and diameter o...

Embodiment 3

[0206] An embodiment of the present invention provides a shale gas diffusion capacity detection device, see Figure 4 , the device consists of:

[0207] The first acquisition module 301 is configured to acquire data of a shale sample, and the data of the shale sample includes: the length of the shale sample and the diameter of the shale sample.

[0208] The second acquisition module 302 is used to regularly collect the cumulative diffusion gas volume of shale gas in the process of free diffusion when the shale gas in the shale sample begins to freely diffuse from the adsorption equilibrium state, and obtain diffusion data. The shale sample The data include: the length of the shale sample and the diameter of the shale sample, and the diffusion data include: the diffusion time of free diffusion of shale gas and the cumulative diffusion gas volume of shale gas corresponding to the diffusion time.

[0209] The first processing module 303 is configured to calculate the shale gas d...

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Abstract

The invention discloses a shale gas diffusion ability detection method, device and system, belonging to the field of shale gas development. The method includes: acquiring data of shale samples; when the shale gas in the shale samples begins to freely diffuse from an adsorption equilibrium state, regularly collects the cumulative diffusion gas volume of the shale gas during the free diffusion process to obtain diffusion data; The shale gas diffusion coefficient and shale gas flow coefficient are calculated according to the diffusion data and the first formula. The present invention considers the adsorption effect of shale gas in shale samples, and allows shale gas to diffuse freely in shale samples, which conforms to the actual flow conditions of shale matrix rock blocks. By using the shale gas diffusion data and the first A formula is used to calculate the shale gas diffusion coefficient or shale gas flow coefficient to evaluate the shale gas diffusion ability, making the evaluation result more accurate and more effective in reflecting the flow ability of shale gas in shale samples.

Description

technical field [0001] The invention relates to the field of shale gas development, in particular to a method, device and system for detecting the diffusion capacity of shale gas. Background technique [0002] The evaluation of the flow capacity of shale gas (that is, the flow capacity of shale gas in shale matrix blocks) is an important dynamic analysis technology for shale gas development, and it is also an important tool for shale gas well productivity prediction, decline law analysis and development plan formulation. essential technology. [0003] The conventional method for evaluating the flow capacity of rock blocks (that is, the flow capacity of fluid in rock blocks) is to build a mathematical model of the flow capacity of rock blocks based on Darcy's law (an experimental law reflecting the law of seepage of water in rock and soil pores). [0004] In the process of realizing the present invention, the inventor finds that there are at least the following problems in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00
Inventor 李武广钟兵冯曦杨洪志刘义成杨学锋吴建发刘勇
Owner PETROCHINA CO LTD
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