Mode of oil-gas migration along fault strike in Enping Sag of Pearl River Mouth Basin

HE Jinhai; WU Jing; BAI Haijun; XU Xinming; LI Zhensheng

doi:10.16028/j.1009-2722.2021.138

2022 Vol. 38, No. 8

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Article navigation > Marine Geology Frontiers > 2022 > 38(8): 55-66

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HE Jinhai, WU Jing, BAI Haijun, XU Xinming, LI Zhensheng. Mode of oil-gas migration along fault strike in Enping Sag of Pearl River Mouth Basin[J]. Marine Geology Frontiers, 2022, 38(8): 55-66. doi: 10.16028/j.1009-2722.2021.138

Citation:

HE Jinhai, WU Jing, BAI Haijun, XU Xinming, LI Zhensheng. Mode of oil-gas migration along fault strike in Enping Sag of Pearl River Mouth Basin[J]. Marine Geology Frontiers, 2022, 38(8): 55-66. doi: 10.16028/j.1009-2722.2021.138

Mode of oil-gas migration along fault strike in Enping Sag of Pearl River Mouth Basin

Shenzhen Branch of CNOOC（China）Ltd., Shenzhen 518000, China

Received Date: 07 May 2021

Accepted Date: 20 June 2022

Publish Date: 01 August 2022

Abstract

Abstract

The transformation in philosophy of oil-gas exploration often brings new exploration breakthroughs. Based on the study of the faults in Enping Sag of the Pearl River Mouth Basin, we recognized a new type of fault that is developed in the northern uplift of the steep slope zone of Enping Sag with the following four characteristics: 1） it intersected with the major fault of the sag at a large angle; 2） it became active at the middle stage of the development of faulted lacustrine basin, forming the sedimentary sources channel for sand transport to the lacustrine basin; 3） at the accumulation stage, it cut the source rocks and sand bodies that were input along the faults in the middle faulting period; 4） the internal transport ridge of the fault were formed along the fault strike due to gradual uplifting of strata toward the uplifting area. Under the sealing effect of the regional thick mudstone cover layer, oil and gas migrated along the fault strike. In this study, exploration breakthroughs were made in the northern uplift of the steep slope zone of Enping Sag that is traditionally considered difficult for oi-gas migration and reservoir formation, and now a series of exploration discoveries have been made in this area. The migration mode of oil and gas along fault strike in the Enping Sag of Pearl River Mouth basin can be used as a reference for practice in similar areas.
- migration along fault strike /
- accumulation /
- sedimentary channel /
- fault zone /
- storage layer /
- uplift area /
- Pearl River Mouth Basin

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References

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