Petroleum Geological Characteristics of Base Rock Pools in Liyuan Area, Biyang Depression

LI Zhi; YUE Xinxin; YANG Yunfei; LI Shuangjian; ZHANG Zhiye; LUO Jiaqun

doi:10.12401/j.nwg.2023022

2023 Vol. 56, No. 5

Article Contents

Article navigation > Northwestern Geology > 2023 > 56(5): 343-350

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LI Zhi, YUE Xinxin, YANG Yunfei, LI Shuangjian, ZHANG Zhiye, LUO Jiaqun. 2023. Petroleum Geological Characteristics of Base Rock Pools in Liyuan Area, Biyang Depression. Northwestern Geology, 56(5): 343-350. doi: 10.12401/j.nwg.2023022

Citation:

LI Zhi, YUE Xinxin, YANG Yunfei, LI Shuangjian, ZHANG Zhiye, LUO Jiaqun. 2023. Petroleum Geological Characteristics of Base Rock Pools in Liyuan Area, Biyang Depression. Northwestern Geology, 56(5): 343-350. doi: 10.12401/j.nwg.2023022

Petroleum Geological Characteristics of Base Rock Pools in Liyuan Area, Biyang Depression

1.
SINOPEC Key Laboratory of Geology and Resources in Deep Stratum, Beijing 102206, China
2.
SINOPEC Henan Oilfield Company, Nanyang 473400, Henan, China

Received Date: 23 December 2021

Revised Date: 12 September 2022

Publish Date: 20 October 2023

Abstract

Abstract

Oil and gas shows are found in bedrock outcrop and bedrock reservoirs are discovered by drilling in Liyuan area of Biyang Depression. Studying its geological conditions and hydrocarbon accumulation process is of great significance for guiding oil and gas exploration in sags. Based on outcrop, seismic, drilling, logging, mud logging core, and geochemical data, the oil and gas accumulation factors and formation process of bedrock pools in Liyuan area are analyzed. It is considered that the oil and gas formed in the hydrocarbon–generating depression of the Hetaoyuan Formation migrated into bedrock and accumulated in the nose–like tectonic setting through the fault–sand complex transport system. The overlying Gushantou Formation schist, boundary fault gouge, upper wall shale and stable hydrodynamic conditions provide effective capping for oil and gas. The marble of Caijiawa Formation of Dahe Group in Mesoproterozoic developed high–angle shear fracture and dissolution hole under the action of structure. The pore permeability is good and it is the main bedrock reservoir. The analysis of hydrocarbon forming model of bedrock reservoirs in Liyuan area can provide reference for hydrocarbon exploration of bedrock reservoirs in the same type of fault basins.
- Biyang depression /
- Caijiawa formation /
- marble /
- sealing conditions /
- pathway system

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References

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