AGE DATING OF MAIN GEOLOGICAL INTERFACES AND ITS SIGNIFICANCE IN OIL AND GAS GEOLOGY IN BEIKANG BASIN

SHUAI Qingwei; ZHANG Li; LEI Zhenyu; LUO Shuaibing; QIAN Xing; LIU Jianping; ZHOU Jiawei

doi:10.16028/j.1009-2722.2020.078

2020 Vol. 36, No. 10

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Article navigation > Marine Geology Frontiers > 2020 > 36(10): 32-41

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SHUAI Qingwei, ZHANG Li, LEI Zhenyu, LUO Shuaibing, QIAN Xing, LIU Jianping, ZHOU Jiawei. AGE DATING OF MAIN GEOLOGICAL INTERFACES AND ITS SIGNIFICANCE IN OIL AND GAS GEOLOGY IN BEIKANG BASIN[J]. Marine Geology Frontiers, 2020, 36(10): 32-41. doi: 10.16028/j.1009-2722.2020.078

Citation:

SHUAI Qingwei, ZHANG Li, LEI Zhenyu, LUO Shuaibing, QIAN Xing, LIU Jianping, ZHOU Jiawei. AGE DATING OF MAIN GEOLOGICAL INTERFACES AND ITS SIGNIFICANCE IN OIL AND GAS GEOLOGY IN BEIKANG BASIN[J]. Marine Geology Frontiers, 2020, 36(10): 32-41. doi: 10.16028/j.1009-2722.2020.078

AGE DATING OF MAIN GEOLOGICAL INTERFACES AND ITS SIGNIFICANCE IN OIL AND GAS GEOLOGY IN BEIKANG BASIN

1.
Guangzhou Marine Geology Survey, CGS, Guangzhou 510760, China
2.
Key Laboratory of Marine Mineral Resources, Ministry of Natural Resources, Guangzhou 510760, China

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Corresponding author: LEI Zhenyu, 44231234@qq.com

Received Date: 09 June 2020

Publish Date: 28 October 2020

Abstract

Abstract

Using the high-resolution 2D seismic data currently acquired and upon the basis of the regional tectonic background, the comprehensive seismic data interpretation for the Beikang Basin is carried out. Main unconformity interfaces are identified, stratigraphic age redetermined, and their geological significance to oil and gas geology discussed. The results suggest that there are six unconformities in the region respectively corresponding to the Liyue movement, Xiwei movement, South China Sea movement, Nansha movement, Wan'an movement and Guangya movement. Among them, the T₃ unconformity is the boundary of the post-spreading period of the South China Sea caused by the Nansha movement, marking the cessation of the South China Sea spreading. Well-seismic correlation of Well Mulu-1 shows that the unconformity surface (T₃) corresponds to the Middle Miocene unconformity surface (MMU) of 16 Ma characterized by high amplitude, strong erosion and large undulation. Abrupt changes in stratigraphic structure, occurrence, and seismic reflection characteristics occur above and below the interface. It is the boundary face between the deformed and undeformed strata, and bears great significance to local structures and hydrocarbon accumulation.
- geological interface /
- tectonic movement /
- oil and gas geology /
- Beikang Basin /
- southwestern of the South China Sea

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References

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