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对河套盆地白垩系-古近系地层体系进行研究。进一步完善河套盆地地层划分体系,为油气资源勘探奠定基础,在综合前人成果的基础上,运用地层中生物化石对其进行划分,由上到下依次为新安群、杭锦群和大水沟群。临河坳陷中,发育两套含油气岩系,赋存在大水沟群和杭锦群中。通过对烃源岩展布及其地球化学方面进行研究,认为烃源岩分布广泛,厚度较大,据我国陆相湖泊泥质烃源岩有机质丰度评价标准,这两套烃源岩均达到中等-好烃源岩评价标准,且均已成熟。
The Cretaceous-Paleogene stratigraphic system in Hetao Basin was studied. Further improve the stratigraphic division system in the Hetao Basin and lay the foundation for the exploration of oil and gas resources. Based on the previous achievements, the stratigraphic fossils are divided into two groups: Xin’an Group, Hangjin Group and Dashuigou Group. Linhe Depression, the development of two sets of oil and gas bearing rocks, exist in the Dashuigou and Hangjinqun. Based on the study of source rock distribution and its geochemistry, it is considered that the source rock is widely distributed and has a large thickness. According to the evaluation standard of organic matter abundance of the muddy source rock of terrestrial lake in our country, Medium - good source rock evaluation criteria, and have been mature.