Method and device for recovering residual carbon content in hydrocarbon source rocks

A technology for source rock and organic carbon, applied in the field of residual organic carbon recovery, can solve the problems of low recovery accuracy, low recovery efficiency, and complicated calculation process, and achieves improved accuracy and efficiency, simple parameters, and improved reliability. Effects of Reliability and Accuracy

Inactive Publication Date: 2016-08-10
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

However, due to the cumbersome calculation process of the above method, the recovery efficiency is low, or it is affected by many experimental factors and human factors, and the recovery accuracy rate is low.

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  • Method and device for recovering residual carbon content in hydrocarbon source rocks
  • Method and device for recovering residual carbon content in hydrocarbon source rocks
  • Method and device for recovering residual carbon content in hydrocarbon source rocks

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0027] The method of “recovering TOC in source rocks based on the principle of material balance” is proposed based on the theory of thermal degradation of kerogen to generate hydrocarbons, from the perspective of source rock evolution and oil and gas generation, retention, and expulsion. Based on the geological concept model of source rock evolution, the change of relevant parameters in source rock is added, and these parameters are combined and derived based on the material balance theory. In the process of deriving the formula, the effects of formation compaction and thermal evolution of sour...

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Abstract

The invention discloses a method and a device for recovering residual carbon content in hydrocarbon source rocks. The method comprises the steps of calculating initial-period porosity and random-evolution-period porosity in hydrocarbon source rocks at different depths; calculating the initial-period density and random-evolution-period density in the hydrocarbon source rocks at different depths; calculating hydrocarbon discharging efficiencies in the hydrocarbon source rocks at different depths; calculating initial-period weight of organic parent materials in the hydrocarbon source rocks at different depths and the accumulated content of generated product components in conversion to a random evolution period; and recovering the residual carbon content in the hydrocarbon source rocks at different depths according to the porosities, densities, hydrogen discharging efficiencies, the initial weight of the organic parent materials in the hydrocarbon source rocks and the accumulated content of the generated product components. The method and the device improve accuracy and efficiency in recovering the residual carbon content in the hydrocarbon source rocks, thereby improving credibility and accuracy in using the residual organic carbon (TOC) content as an effective hydrocarbon source rock determination standard.

Description

technical field [0001] The invention relates to the technical field of residual organic carbon recovery, in particular to a method and device for recovering residual organic carbon content in source rocks. Background technique [0002] After the thermal evolution of source rocks enters the mature stage, the residual organic carbon (TOC) content gradually decreases with the large-scale hydrocarbon expulsion. For source rocks in the highly mature-over-mature stage, the difference in residual TOC is more significant than that in the initial period before hydrocarbon expulsion. The most important criterion for evaluating the lower limit of effective source rocks is the organic carbon (TOC) content in the source rocks. If the residual TOC in the high-mature-over-mature stage is used as the criterion to evaluate the effectiveness of source rocks, it will inevitably lead to large error. Therefore, it is necessary to restore the residual TOC in source rocks to the original state b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 李倩文
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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