Method and device for measuring and calculating underground organic matter porosity degree

An organic matter and porosity technology, which is applied in the field of shale reservoir physical property research and shale oil and gas resources, can solve the problems of large prediction results, poor prediction effect, inaccurate calculation results of organic matter porosity, etc. Inaccuracy, the effect of improving accuracy

Active Publication Date: 2014-12-24
PETROCHINA CO LTD
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Problems solved by technology

[0013] This method is actually an improvement of the PhiK model. This method converts the maximum porosity of organic matter under ideal conditions into the porosity observed on the ground Ar ion polished thin section, which will also appear in the middle and low evolution stages (Ro<1.2), that is In the oil

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  • Method and device for measuring and calculating underground organic matter porosity degree
  • Method and device for measuring and calculating underground organic matter porosity degree
  • Method and device for measuring and calculating underground organic matter porosity degree

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[0072] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. Here, the exemplary embodiments of the present invention and the description thereof are used to explain the present invention, but not as a limitation to the present invention.

[0073] Taking into account the existing measurement and calculation of underground organic matter porosity, the result obtained by the logging curve calculation method is the porosity in the ideal state, and the result is too large. The result obtained by the method of combining statistical methods and experiments with Ar ion polishing thin slice analysis Is the observation porosity, during the oil generation window stage (ie, Ro <1.2) The result is small.

[0074] In this example, a method for measuring the porosity of underground organic matter is provided, such as figure 1 As s...

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Abstract

The invention provides a method and device for measuring and calculating the underground organic matter porosity degree. The method includes the steps that multiple well points are selected in a research region, and a relation curve between the organic carbon recovery coefficient and the organic matter thermal evolution degree of the research region is obtained; the organic matter thermal evolution degrees of all the selected well points are obtained, and the following operations are conducted on all the well points: the original organic carbon weight percentage content of all the well points is calculated, the maximum organic matter porosity degree of the well points is calculated, the observation organic matter porosity degree of the well points is worked out, weighted averaging is conducted on the maximum organic matter porosity degree and the observation organic matter porosity degree of the well points, and the average organic matter porosity degree of the well points is worked out. By means of the method and device for measuring and calculating the underground organic matter porosity degree, the technical problem that in the prior art, measurement and calculation of the organic matter porosity degree are inaccurate in measuring and calculating result is solved, and the accuracy of the measuring and calculating result is improved.

Description

technical field [0001] The invention relates to the technical field of research on physical properties of shale reservoirs and shale oil and gas resources, in particular to a method and device for measuring and calculating the porosity of underground organic matter. Background technique [0002] Shale oil and gas is currently one of the most concerned types of unconventional oil and gas. It is a field of potential oil and gas resource replacement that major oil companies are investing in research. The measurement of organic matter porosity in the underground state has a great impact on the physical properties of shale reservoirs. Research and calculation of shale oil and gas resources are very important. [0003] Organic matter pores refer to the residual pore space after solid kerogen is transformed into non-solid hydrocarbons during the hydrocarbon generation process of organic matter in shale, and organic matter porosity refers to the percentage of organic matter pore vol...

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Application Information

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IPC IPC(8): G01V9/00
Inventor 郭秋麟邹才能李建忠杨涛吴晓智陈宁生
Owner PETROCHINA CO LTD
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