Multi-Type Hydrocarbon Accumulation Mechanism in the Hari Sag, Yingen Ejinaqi Basin, China

Biao Peng, Lulu Zhang, Jianfeng Li, Tiantian Chang and Zheng Zhang
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Biao Peng: Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an 710000, China
Lulu Zhang: School of Geoscience, China University of Petroleum (Beijing), Beijing 710069, China
Jianfeng Li: School of Geoscience, China University of Petroleum (Beijing), Beijing 710069, China
Tiantian Chang: School of Geoscience, China University of Petroleum (Beijing), Beijing 710069, China
Zheng Zhang: School of Human Settlement and Civil Engineering, Xi’an Jiaotong University, Xi’an 710000, China

Energies, 2022, vol. 15, issue 11, 1-14

Abstract: With the successful development of unconventional hydrocarbons, the production of unconventional hydrocarbons has increased rapidly. However, a single conventional or unconventional model is not suitable for the mechanism of hydrocarbon accumulation in a given basin or sag. Based on data from drilling, logging, and geophysical analysis, the hydrocarbon accumulation mechanism in the Hari sag in the Yingen-Ejinaqi basin, China, was analyzed. There are three sets of source rocks in the Hari sag: the K 1 y source rocks were evaluated as having excellent source rock potential with low thermal maturity and kerogen Type I-II 1 ; the K 1 b 2 source rocks were evaluated as having good source rock potential with mature to highly mature stages and kerogen Type II 1 -II 2 ; and the K 1 b 1 source rocks were evaluated as having moderate source rock potential with mature to highly mature stages and kerogen Type II 1 -II 2 . Reservoir types were found to be conventional sand reservoirs, unconventional carbonate-shale reservoirs, and volcanic rock reservoirs. There were two sets of fault-lithologic traps in the Hari sag, which conform to the intra-source continuous hydrocarbon accumulation model and the approaching-source discontinuous hydrocarbon accumulation model. The conclusions of this research provide guidance for exploring multi-type reservoirs and multi-type hydrocarbon accumulation models.

Keywords: Yingen-Ejinaqi basin; Hari sag; source rock; lithologic trap; accumulation condition; accumulation model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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