Diagenetic evolution simulation experiment method for mud shale

A simulation experiment, mud shale technology, applied in the field of simulation experiment, can solve the problem of incompetent material composition, observation and research of diagenesis phenomenon, fine grain size of mud shale, etc.

Inactive Publication Date: 2015-08-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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AI Technical Summary

Problems solved by technology

Due to the fine particle size of mud shale, traditional methods such as magnifying glass and ordinary polarizing microscope cannot effectively observe and study the material composition and diagenesis phenomena

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0005] 1) Sample selection: for samples of different kerogen types. Select fresh shale samples with high organic matter abundance and low evolution degree.

[0006] 2) Sample preparation: cut the sample into a fixed shape (cube and sheet), the cube size is 1cmx1cmx1cm, and the sheet size is 1cmx1cmx0.5mm. The thin slice surface should be perpendicular or oblique to the bedding surface, and polished with 500 mesh, 600 mesh, 800 mesh, 1000 mesh, 1200 mesh, 1500 mesh sandpaper in sequence, and finally fully polished with 2000 mesh sandpaper.

[0007] 3) Experimental device: thermal simulation experiment system for high temperature and high pressure oil and gas formation. The system consists of an autoclave, a high temperature heating furnace, a vacuum and pressurization system, a thyristor heating control system, a temperature and pressure sensing system and a gas collection system.

[0008] 4) Sample filling: put the prepared sample into an autoclave, and add distilled water, ...

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Abstract

The invention discloses a diagenetic evolution simulation experiment method for mud shale and belongs to the field of petroleum exploration and development. The diagenetic evolution of a mud shale reservoir is simulated by using the experiment method, and the problem of evolution of organic matters, mineral components and pores in the mud shale reservoir is solved. The method comprises the following main experiment steps: (1) preparing a sample; (2) performing thermal simulation, (3) collecting and analyzing oil gas; (4) performing experiment sample after-treatment; (5) performing different scales and different ways of comprehensive observation research on the evolution of the organic matters of the sample, the diagenesis of inorganic minerals and the development situation of the pores by utilizing a common polarizing microscope, a fluorescent microscope, a laser scanning confocal microscope, a cathode luminescence microscope and a field emission scanning electron microscopy. The method is used for researching the diagenetic evolution of the mud shale reservoir and determining the evolution characteristics of the organic matters, the mineral components and the pores with different lithofacies, different organic matter types and different organic matter maturity stages in the mud shale reservoir, and plays an important role in research of the characteristics of the mud shale reservoir and the characteristics of an oil-gas enrichment rule.

Description

technical field [0001] The invention relates to the geological field of petroleum exploration and development, and is a set of simulation experiment methods aimed at the diagenetic evolution of mud shale reservoirs. Background technique [0002] With the rapid development of unconventional oil and gas exploration and development, especially the in-depth exploration and development of mud shale oil and gas, people pay more and more attention to the research on mud shale reservoirs. Among them, the pore type and pore structure are mud shale One of the key points of reservoir research. Due to the fine particle size of shale reservoir materials and strong sensitivity to temperature, pressure and fluid, its diagenetic evolution is more complicated, which leads to the complexity of its pore types and pore structure characteristics. Therefore, the study of diagenesis It is an important basis for the study of shale reservoirs. [0003] In the past, sandstone reservoirs were the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
Inventor 董春梅栾国强马存飞林承焰张宪国杨元
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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