Shale gas diffusion capability detection method, device and system

A technology of diffusion ability and detection method, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., and can solve problems such as the evaluation of flow capacity of unsuitable shale matrix rock blocks

Active Publication Date: 2016-06-01
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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  • Shale gas diffusion capability detection method, device and system
  • Shale gas diffusion capability detection method, device and system
  • Shale gas diffusion capability detection method, device and system

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Embodiment 1

[0054] The embodiment of the present invention provides a method for detecting the diffusion capacity of shale gas, see figure 1 , the method flow includes:

[0055] 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.

[0056] 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.

[0057] 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 of...

Embodiment 2

[0067] The embodiment of the present invention provides a method for testing the diffusion capacity of shale gas, see figure 2 , the method flow includes:

[0068] 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.

[0069] 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.

[0070] 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

[0211] An embodiment of the present invention provides a shale gas diffusion capacity detection device, see Figure 4 , the device consists of:

[0212] 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.

[0213] 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.

[0214] 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 capability detection method, device and system and belongs to the field of shale gas exploitation. The method comprises acquiring shale sample data, when shale gas in a shale sample in an adsorption balance state freely diffuses, regularly acquiring an accumulative diffused gas amount of the shale gas in free diffusion to obtain diffusion data and calculating a shale gas diffusion coefficient and a shale gas flow coefficient according to the diffusion data and a first formula. Through adsorption effects of shale gas in a shale sample, the shale gas can freely diffuse in the shale sample and satisfies the real flow cases of a shale matrix block. Through the shale gas diffusion coefficient or the shale gas flow coefficient obtained through the diffusion data and the first formula, a shale gas diffusion capability is evaluated. The method can produce the accurate evaluation result and effectively show a shale gas flow capability in the shale sample.

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 Applications(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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