Method and device for determining hydrocarbon expulsion rate of source rock

Abstract

The invention provides a method and apparatus for determining hydrocarbon expulsion rate of source rock. The method comprises the steps of: acquiring the direct pressure semi-open semi-enclosed thermal simulation experimental data of the source rock to be analyzed; determining a first hydrocarbon expulsion rate data based on the thermal simulation experiment data; acquiring pyrolysis gas chromatography experimental data; according to the pyrolysis gas chromatography experimental data, conducting light hydrocarbon compensation on the first hydrocarbon expulsion rate to obtain a second hydrocarbon expulsion rate; and using the second hydrocarbon expulsion rate as the hydrocarbon expulsion rate of the source rock to be analyzed. The invention solves the technical problems of complicated method to determine the hydrocarbon expulsion of source rocks rate and low accuracy of the prior art, and achieves the technical effect of simple and accurate determination of hydrocarbon expulsion rate of the source rock.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a method and a device for determining the hydrocarbon expulsion rate of source rocks. Background technique [0002] The hydrocarbon expulsion rate is the percentage of the amount of hydrocarbons expelled from source rocks to the amount of generated hydrocarbons. The hydrocarbon expulsion rate of source rocks is closely related to all factors that affect the generation, residue, and transport of hydrocarbons, and is also related to the thickness of source rocks, adjacent transportation, etc. It is related to the physical properties, hydrodynamic conditions of the conducting layer or the reservoir layer, and the combination form and contact area of ​​the source-reservoir layer. Therefore, how to accurately determine the hydrocarbon expulsion rate of source rocks will directly affect the migration and accumulation coefficient of oil and gas. [0003] At present, there...

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Problems solved by technology

However, the original hydrocarbon generation potential in this method is generally difficult to obtain accurately

[0010] 7) Evolution trend surface difference subtraction method, this method is based on the full understanding of the law of chemical kinetics and hydrocarbon expulsion basis, and the method of estimating hydrocarbon expulsion rate on the basis of comprehensive analysis of geochemical data, however, in many The lack of relevant data in the region makes it difficult to carry out evaluation work

[0013] For the technical problem of how to simply and accurately determine the hydrocarbon expulsion rate of source rocks, no effective solution has been proposed so far

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