Method for calculating original organic matter abundance recovery coefficient

A technology of organic matter abundance and restitution coefficient, applied in the measurement of scattering characteristics, etc., can solve the problems of difficulty in obtaining key parameters and high cost

Active Publication Date: 2015-06-10
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

This involves the problem of calculating the restoration coefficient of the original organic matter abundance of highly evolved source rocks. Some scholars have proposed a series of related calculation

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  • Method for calculating original organic matter abundance recovery coefficient
  • Method for calculating original organic matter abundance recovery coefficient
  • Method for calculating original organic matter abundance recovery coefficient

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Embodiment Construction

[0078] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.

[0079] Such as figure 1 as shown, figure 1 It is a flow chart of the method for calculating the restoration coefficient of original organic matter abundance in the present invention.

[0080] In step 101, the mathematical relationship between the hydrocarbon generation rate of each organic matter type and the vitrinite reflectance is established. The hydrocarbon generation rate (G) refers to the mass of hydrocarbons produced per gram of organic carbon when the thermal evolution of the source rock reaches a certain level. impact on indicators. The potential maximum hydrocarbon generation rate of the source rock when it is immature is the original hydrocarbon generation rate of the source rock (Gy). Such as Figure 2 to Figure 5 As shown, the ...

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Abstract

The invention provides a method for calculating original organic matter abundance recovery coefficient, which comprises the following steps: establishing a mathematical relationship between an organic matter-type hydrocarbon-generation rate G and a vitrinite reflectance Ro; calculating the relation of residual degradation rate Dc and the hydrocarbon-generation rate; when the original hydrocarbon-generation rate Gy is hypothesized as the hydrocarbon-generation rate when the vitrinite reflectance Ro equals 4, according to the relation between the hydrocarbon-generation rate G and the vitrinite reflectance Ro as well as the residual degradation rate Dc and the hydrocarbon-generation rate G, obtaining the relation of high-evolution hydrocarbon source rock original organic matter abundance recovery coefficient Rc and the vitrinite reflectance Ro; using the vitrinite reflectance Ro and conversion coefficient a of conversion from effective organic carbon to hydrocarbons to calculate the high-evolution hydrocarbon source rock original organic matter abundance recovery coefficient Rc, and recovering the high-evolution hydrocarbon source rock original organic matter abundance. The method has the obvious characteristics of less parameter and simple operation.

Description

technical field [0001] The invention relates to the field of restoration of original organic matter abundance, in particular to a method for calculating the restoration coefficient of original organic matter abundance. Background technique [0002] Carbonate marine strata in southern China are rich in resources, and many sets of large-scale source rocks are developed. However, these source rocks have a high degree of thermal evolution, and the vitrinite reflectance Ro of most source rocks is above 1.5%, which means they are in a highly mature or over-mature stage. The organic matter of high-temperature evolution source rocks has completed a large number of hydrocarbon generation and expulsion processes. The organic carbon content measured by experiments is the residual organic carbon content after a large amount of hydrocarbon generation and expulsion processes have been completed. The current organic matter has basically lost its generation and expulsion processes. Obvious...

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Application Information

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IPC IPC(8): G01N21/55
Inventor 李志鹏高振中郭迎春陈利
Owner CHINA PETROLEUM & CHEM CORP
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