An in-situ helium resource assessment method that takes into account both porosity and helium generation “age” corrections

Abstract

The present invention relates to an in-situ helium resource evaluation method that takes into account the correction of porosity and helium generation "age", and belongs to the technical field of helium genesis source identification and reservoir formation process analysis, including: clarifying the target production layer section, determining the helium generation rock type in the production layer section, determining the source rock volume and source rock quality; obtaining basic data, clarifying the reservoir temperature, reservoir pressure and the solubility coefficient of helium in water; testing and analyzing to obtain the He content c in natural gas samples at different depths; obtaining the average abundance of initial U and Th; selecting the most accurate and reliable plunger sample helium method to characterize the porosity of shale, and 4 He age is corrected. Compared with the existing technology, the calculated in-situ helium resources are more accurate, scientific and convincing.

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