Shale matrix reservoir pore space representation method

A space table and pore technology, applied in image data processing, instruments, calculations, etc., can solve the problems of inaccuracy and difficulty in considering organic pores and inorganic pores at the same time, and achieve a good fitting effect

Inactive Publication Date: 2016-11-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

However, whether it is directly constructed by physical methods or randomly reconstructed using two-dimensional image data, only digital cores of a single scale or single composition can be constructed, which is not accurate enough for s

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  • Shale matrix reservoir pore space representation method
  • Shale matrix reservoir pore space representation method
  • Shale matrix reservoir pore space representation method

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Embodiment 2

[0097] Experiment purpose and method: In order to evaluate the feasibility and effectiveness of the present invention, this embodiment takes a certain shale sample as an example to carry out research examples, and the shale sample is subjected to ore composition analysis, X-ray diffraction pattern analysis, nitrogen absorption and desorption The analysis is attached, and the specific experimental steps refer to the standard experimental operation.

[0098] Experimental results:

[0099] After the ore analysis of a shale sample, it is found that the shale sample is a set of mixed clastic rock and carbonate rock, which is a set of regional high-quality source rock. From the X-ray diffraction pattern analysis, it can be known that the mineral composition of the sample is mainly quartz and pyrite, containing a small amount of plagioclase and clay minerals, the organic carbon content (TOC) is 6.5%, and the porosity is 5.3%. The experimentally obtained pore structure parameters are...

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Abstract

The invention relates to a characterization method for pore space of shale matrix reservoirs. Based on different types of pores in shale gas reservoir cores, based on the superposition coupling method, a construction theory for digital cores generated by a hybrid method while considering organic pores and inorganic pores is established. with method. The digital core that considers organic pores and inorganic pores is constructed by superposition algorithm, which not only retains the geometric topology information of inorganic pores, but also retains the spatial position information of organic micropores, and can describe the special pore distribution characteristics of shale rocks at the same time. The established digital core was analyzed for geometric topology, and the pore radius distribution and coordination number fit well with the experimental results, which verified the correctness of the construction method and numerical analysis method. This method establishes a basic platform for subsequent shale medium pore structure analysis and microscopic flow simulation.

Description

technical field [0001] The invention relates to the technical field of numerical simulation of oil and gas field development engineering, in particular to a characterization method for pore space of shale matrix reservoirs. Background technique [0002] In order to realize the efficient development of shale gas reservoirs, the study of gas migration mechanism in micro-nano pores is one of the key mechanical issues, and digital cores are the basis for micro-nano scale flow simulation. Therefore, the identification and quantitative description of shale micro-nano pores and the establishment of an accurate characterization method for shale reservoir pore space have become the focus and difficulty of research. [0003] The pore structure of shale is complex, including nanoscale organic pores, nano-micron pores in inorganic minerals, and micron-millimeter natural fractures. Mud shale has different degrees of thermal evolution, resulting in different types of pores. The phase st...

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Application Information

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IPC IPC(8): G06T7/40
CPCG06T7/40G06T2207/10081
Inventor 杨永飞张文杰姚军张建光孙致学樊冬艳安森友孙海张磊张琦赵建林刘磊
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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