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Method for testing and analyzing characteristic parameters of nanopore structure in shale reservoir and system thereof

A technology of structural characteristic parameters and nano-porosity, which is applied in the analysis of suspensions and porous materials, analysis of materials, permeability/surface area analysis, etc.

Inactive Publication Date: 2019-02-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Literature 2011 27 (6) Journal of Petrology "The First Discovery of Nanopores in Petroleum Reservoirs in China and Its Scientific Value" expounded that the nanopore structure in shale reservoirs was discovered by nano-CT imaging technology, and the type, shape and development of pores However, the problem in the above two literatures is that there are no parameters to characterize and evaluate the pore structure characteristics of shale reservoir cores.

Method used

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  • Method for testing and analyzing characteristic parameters of nanopore structure in shale reservoir and system thereof
  • Method for testing and analyzing characteristic parameters of nanopore structure in shale reservoir and system thereof
  • Method for testing and analyzing characteristic parameters of nanopore structure in shale reservoir and system thereof

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Embodiment approach 1

[0020] figure 1 A flow chart of a method for testing and analyzing characteristic parameters of nano-pore structure of shale reservoirs according to the present invention is shown.

[0021] Such as figure 1 As shown, one aspect of the present invention provides a method for testing and analyzing characteristic parameters of nanopore structure of shale reservoirs, the method comprising: step 101, collecting a two-dimensional tomographic image of a shale sample; step 102, based on the shale sample The two-dimensional tomographic image of the shale is reconstructed into a three-dimensional image; step 103, based on the three-dimensional image, the characteristic parameters of the shale nano-pore structure are obtained.

[0022] The invention rebuilds the three-dimensional image through the two-dimensional tomographic image of the shale sample, and then realizes the acquisition of the characteristic parameters of the nano-pore structure of the shale.

[0023] The present inventi...

Embodiment

[0043] Figure 2a A shale sagittal 2D image of a shale core is shown according to one embodiment of the present invention. Figure 2b A shale cross-sectional 2D image of a shale core according to an embodiment of the present invention is shown. Figure 2c A shale coronal 2D image of a shale core is shown according to an embodiment of the present invention. Figure 2d A shale 3D image of a shale core is shown according to one embodiment of the invention. image 3 A pore size distribution map of a shale core according to an embodiment of the present invention is shown. Figure 4 A throat distribution map of a shale core according to an embodiment of the present invention is shown.

[0044] The present invention provides a method for testing and analyzing characteristic parameters of nanopore structure of shale reservoirs, the method comprising:

[0045] (1) Acquisition of two-dimensional tomographic images of shale samples;

[0046] Sampling and sample preparation, select a...

Embodiment approach 2

[0059] Another aspect of the present invention provides a system for testing and analyzing characteristic parameters of nanopore structure of shale reservoirs. The system includes: a memory storing computer-executable instructions; a processor running the computer in the memory. Execute the instruction to perform the following steps: collect a two-dimensional tomographic image of the shale sample; reconstruct a three-dimensional image based on the two-dimensional tomographic image of the shale sample; obtain characteristic parameters of the shale nano-pore structure based on the three-dimensional image.

[0060] In one example, the step of preparing a shale sample is also included.

[0061] In an example, the 2D tomographic image of the shale sample is imported and segmented, the modeling area is selected, and the 3D image is reconstructed.

[0062] In one example, the characteristic parameters of the shale nano-pore structure include porosity, average pore diameter, pore conn...

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Abstract

The invention discloses a method for testing and analyzing characteristic parameters of a nanopore structure in a shale reservoir and a system thereof, The method includes the following steps: collecting a two-dimensional tomographic image of a shale sample; re-establishing a three-dimensional image based on the two-dimensional tomographic image of the shale sample; and obtaining the characteristic parameters of the shale nanopore structure based on the three-dimensional image. The technical scheme of the method utilizes a nano-CT technology to non-destructively detect the shale reservoir coreto obtain the shale pore structure image, and can accurately and quickly analyze the pore structure characteristic parameters of the shale reservoir core at the nanometer scale.

Description

technical field [0001] The invention belongs to the technical field of shale core experiment analysis technology for exploration and development of unconventional oil and gas fields, and more specifically relates to a method and system for testing and analyzing characteristic parameters of nanopore structure of shale reservoirs. Background technique [0002] The nanopore structure of shale reservoirs reflects the storage and seepage capacity of reservoir cores, as well as the geometric shape, size, distribution and interconnection of different pores and throats. The characteristic parameters of nano-pore structure of shale reservoir cores are important indicators for reservoir evaluation. At present, the application of micro-CT and nano-CT scanning technology in shale core analysis is mainly to quickly and non-destructively detect shale reservoir cores, and use the internal images of the cores to study the pore structure characteristics of the cores. [0003] Two papers in ...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 郎东江伦增珉吕成远潘伟义王海涛赵清民赵春鹏周霞王锐
Owner CHINA PETROLEUM & CHEM CORP
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