Paleo-environmental Characteristics of the Development of High-quality Hydrocarbon Source Rocks in Hetaoyuan Formation of Biyang Sag and Geological Significance

doi:10.3969/j.issn.1006-6535.2021.01.007

Abstract

Abstract: To solve the problem of unclear hydrocarbon generation conditions and development environment of high-quality hydrocarbon source rocks in Biyang Sag, a variety of geological and geochemical analysis methods were used to describe the development scale of the main hydrocarbon source rocks and define the development environment of high-quality hydrocarbon source rocks in the research area, which provides important basis for further oil and gas exploration. According to the hydrocarbon generation conditions and resource contribution analysis, we proposed the Section H₃⁴-H₃² of Hetaoyuan Formation is a high-quality hydrocarbon source rock development section, and the research on paleo-environmental shows that the water gradually become salty from bottom to top in the hydrocarbon source rock sedimentary environment of Hetaoyuan Formation, and the abundance of organic matters in main salting period of Section H₃ upper-H₂ is also relatively high. In conclusion, the comprehensive analysis shows that the annular concave belt is a favorable area for further exploration because of its good hydrocarbon source rock conditions and large amount of remaining resources,This study further clarified the development environment of high-quality source rocks, and provided the basis for further exploration of oil and gas basins.

Key words: geochemical characteristics, high-quality hydrocarbon source rocks, salting environment, microelement, Biyang Sag, Hetaoyuan Formation

CLC Number:

TE122.1

Shi Zhengyong, Jin Yunyun, Luo Jiaqun. Paleo-environmental Characteristics of the Development of High-quality Hydrocarbon Source Rocks in Hetaoyuan Formation of Biyang Sag and Geological Significance[J]. Special Oil & Gas Reservoirs, 2021, 28(1): 51-58.

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