A Method for Evaluation of Hydrocarbon Generation Conversion Rate of Source Rock Organic Matter

Abstract

The invention relates to a method for evaluating the hydrocarbon source rock organic matter hydrocarbon generation conversion rate, in particular to a method for evaluating the organic matter hydrocarbon generation conversion rate based on the principle of material balance and belongs to the technical field of petroleum resource assessment. Actually-measured hydrocarbon source rock pyrolysis data and a simple mathematical model are adopted for calculation, meanwhile correction of HI is considered, the corrected HI is applied to analysis and evaluation of the organic matter hydrocarbon generation conversion rate, and result accuracy and reliability are remarkably improved. The method has the advantages of being rapid, low in application cost and high in operability, the obtained result is precise, and large-scale industrialized application is achieved conveniently.

Description

technical field [0001] The invention relates to a method for evaluating the conversion rate of organic matter in hydrocarbon source rocks, in particular to an evaluation method for the conversion rate of organic matter in hydrocarbon generation based on the principle of material balance, and belongs to the technical field of oil and gas resource evaluation. technical background [0002] The hydrocarbon generation conversion rate of organic matter is a basic parameter for evaluating oil and gas resources in a basin. There are currently two ways to obtain it. One is to select immature source rocks and carry out thermal simulation experiments in the laboratory (Lewan and Williams, 1987; Gao Gang and Huang Zhilong, 2000; Lu Shuangfang et al., 1994, 2006), obtained artificially matured samples at different temperature stages, and carried out Rock-Eval pyrolysis experiments on the artificially matured samples, and obtained the hydrocarbon production rate and organic matter thermal ...

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Problems solved by technology

[0003] In the first method, T max or R o , does not match the maturity data under geological low temperature and slow temperature rise conditions, which makes the application of hydrocarbon generation conversion rate obtained by this method questionable

In the second method, there are many parameters in the hydrocarbon generation kinetic model, and the multi-solution problem has not been solved, which limits the application of this method

However, the currently commonly used experimental method and chemical kinetic model method do not match the hydrocarbon conversion rate of the experiment and the geological conditions, and the experiment is time-consuming and expensive, and there is no correction of the actual measurement data, making it difficult to obtain the hydrocarbon conversion rate results, which are credible. low degree

In addition, when evaluating the hydrocarbon generation potential of source rocks using rock pyrolysis geochemical data at home and abroad, the influence of residual hydrocarbons in mudstone pores and adsorbed hydrocarbons in organic matter has not been considered, that is, the hydrogen index HI has not been corrected and the corrected hydrogen index HI Applied to the evaluation of organic matter hydrocarbon generation conversion rate

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