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Method for judging shale oil reservoir organic matter microcosmic occurrence structure

A technology of microscopic occurrence and shale oil, which is applied in measuring devices, suspension and porous material analysis, instruments, etc., can solve problems such as difficult to determine microstructure scale parameters, and achieve the effect of low cost and simple operation

Active Publication Date: 2021-02-02
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0007] In order to solve the above technical problems, the present invention provides a method for judging the microcosmic occurrence structure of organic matter in shale oil reservoirs, and solves the problem in the prior art that it is difficult to determine the microstructure scale parameters of organic matter in each state of occurrence

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  • Method for judging shale oil reservoir organic matter microcosmic occurrence structure
  • Method for judging shale oil reservoir organic matter microcosmic occurrence structure
  • Method for judging shale oil reservoir organic matter microcosmic occurrence structure

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Embodiment Construction

[0044] The principles and features of the present application are described below in conjunction with the embodiments, which are only used to explain the present invention, and are not intended to limit the scope of the present application.

[0045] The existing shale gas organic matter analysis methods are roughly divided into three types, one is reflected light fluorescence microscope and scanning electron microscope observation method; the other is solvent extraction method and thermal extraction method; the third is chemical oxidation method. Among them, although reflected light fluorescence microscopy and scanning electron microscopy can intuitively obtain organic matter in different states of occurrence, they cannot judge the relationship between organic matter and minerals; while solvent extraction and thermal extraction are currently the most common soluble organic matter Quantitative analysis method, but it can not determine the content of free hydrocarbons in rocks, w...

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Abstract

The invention relates to a method for judging a shale oil reservoir organic matter microcosmic occurrence structure, which relates to the technical field of oil and gas development. A shale oil reservoir sample is prepared; the shale oil reservoir sample is sequentially subjected to shale oil extraction, free-state solid asphalt decomposition, adsorbed-state solid asphalt extraction, convertible kerogen pyrolysis and non-convertible kerogen oxidation, and specific surface, pore volume and pore size distribution parameters of occurrence spaces of shale oil, free-state solid asphalt, adsorbed solid asphalt, convertible kerogen and non-convertible kerogen in the shale oil reservoir are obtained. The invention discloses a method for judging a microscopic occurrence structure of organic mattersin a shale oil reservoir, which can be used for determining microstructure scale parameters of the organic matters in each occurrence state, can effectively separate the organic matters in differentoccurrence states in the shale oil reservoir, and is low in cost and simple to operate.

Description

[0001] The invention relates to the technical field of oil and gas development, in particular to a method for judging the microscopic occurrence structure of organic matter in shale oil reservoirs. Background technique [0002] Organic matter is the material basis for the formation of shale oil and gas. As the depth of formation increases, the temperature and pressure continue to change, and the maturity of organic matter begins to change, and oil and gas begin to form. The organic matter of mature shale is divided into kerogen, shale oil, and solid bitumen, which can be subdivided into shale oil, clastic minerals, free solid bitumen between fractures, solid bitumen adsorbed by kerogen, solid bitumen adsorbed by clay minerals, and convertible Kerogen and non-transferable kerogen. With the increase of maturity, the proportion and microscopic size of organic matter in different occurrence states change, and the change rule has important guiding significance for the hydrocarbon g...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/08G01N15/0893G01N2015/0866
Inventor 陈文玲周文易婷李沁任杰谭杨代朝辉
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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