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Method for calculating organic carbon recovery coefficient of biogenic gas source rock

A recovery coefficient and organic carbon technology, applied in the field of natural gas exploration, can solve the problems of lack of rationality, unfavorable planar resource abundance research, error of biogas resource amount, etc., and achieve strong operability, easy acquisition, and simple calculation method Effect

Inactive Publication Date: 2018-11-13
NORTHEAST GASOLINEEUM UNIV +1
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Problems solved by technology

There is no basis for the rationality of the assignment, which brings large errors to the calculation of biogas resources
At the same time, it is not conducive to the study of planar resource abundance.

Method used

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  • Method for calculating organic carbon recovery coefficient of biogenic gas source rock
  • Method for calculating organic carbon recovery coefficient of biogenic gas source rock
  • Method for calculating organic carbon recovery coefficient of biogenic gas source rock

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing, the present invention will be further described:

[0019] This method for calculating the organic carbon recovery factor of biogas source rocks:

[0020] 1. The main component of biogas is methane, and the carbon-containing molecules in other components include: heavy hydrocarbons and carbon dioxide. Due to the low content of heavy hydrocarbons (which is the characteristic of biogas), according to the principle of carbon element conservation, the content of heavy hydrocarbons with low content is ignored, and the content of heavy hydrocarbons is generally less than 2%. It can be simplified to think that the original source rocks All of the organic carbon consumed is converted into methane and carbon dioxide produced.

[0021] 2. Establish the relationship of carbon element conservation: original organic carbon content = remaining organic carbon content + carbon content in methane + carbon content in carbon dioxide.

[002...

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Abstract

The invention relates to a method for calculating an organic carbon recovery coefficient of biogenic gas source rock. The method includes steps: firstly, methane is taken as a main component in biogenic gas, carbonic molecules in other components include heavy hydrocarbon and carbon dioxide, the heavy hydrocarbon low in content is negligible according to a carbon element conservation principle, and to be simplified, organic carbon consumed in original hydrocarbon source rock is completely converted into generated methane and carbon dioxide; secondly, a carbon element conservation relation is established, and the original organic carbon content is equal to the amount of residual organic carbon content, generated methane carbon content and generated carbon dioxide carbon content; thirdly, acalculation relation among the organic carbon recovery coefficient, organic carbon gas generating rate and carbon dioxide content in products is established, and a calculation formula of the organic carbon recovery coefficient is obtained. The method is helpful to accurate calculation of biogenic gas resource quantity and planar resource abundance and has guiding significance to determination of favorable exploration areas.

Description

technical field [0001] The invention relates to the calculation of the amount of biogas resources of source rock bacteriolysis type in the field of natural gas exploration, in particular to a method for calculating the organic carbon recovery coefficient of source rocks of biogas. Background technique [0002] Biogas refers to the natural gas formed by the biochemical action of anaerobic bacteria in the immature stage of different types of organic matter. The biogas formed by utilizing the organic matter in the source rock is called the source rock bacteriolysis type biogas. [0003] There is no effective method for the recovery of original organic carbon in biogas source rocks. When the predecessors calculated the amount of biogas resources, the value of the recovery coefficient of organic carbon was usually given a fixed value. There is no basis for the rationality of the assignment, which brings large errors to the calculation of biogas resources. At the same time, it ...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 刘晓文何春波吴雨农史集建王静怡朱焕来姜明明
Owner NORTHEAST GASOLINEEUM UNIV
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