塔里木盆地二八台地区走滑断裂体系研究

doi:10.11720/wtyht.2024.0015

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Abstract

In structural confirmation for oil and gas exploration, ascertaining the distributions of faults remains a challenge and priority in seismic data interpretation. The most complex fault combinations can be observed in strike-slip fault systems. This study investigated the Erbatai area that hosts a complex Luntai strike-slip fault system in the Tarim Basin. First, the background noise was reduced using the dip angle plus azimuth scanning and the structure-oriented filtering. Then, a multi-level nesting technology was developed by integrating attributes like coherence cube, ant-tracking attribute, and maximum likelihood. Using the technology, this study identified and statistically analyzed 41 faults in the Erbatai area for their geometric development characteristics, including strike, dip, dip angle, and fault throw. Furthermore, this study determined the complex fault combinations within the strike-slip fault system. The findings indicate that the Erbatai area develops a dominant nearly EW-trending strike-slip fault zone and a NE-trending secondary fault zone. These faults are extensional fractures caused by left-lateral torsion, manifested as right-stepping en echelon normal faults. Overall, this study can be referenced for assessing structural hydrocarbon reservoirs in the Erbatai area.

Key words： strike-slip fault seismic interpretation structure-oriented filtering Tarim Basin Erbatai area

Received: 15 January 2024 Published: 08 January 2025

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	Articles by authors
	Jia-Chang ZHANG
	Tao LI
	Hong-Gang LIANG
	E FEI
	Zhi-Yuan SUN
	Tong YUE

Cite this article:

Jia-Chang ZHANG,Tao LI,Hong-Gang LIANG, et al. Strike-slip fault system in the Erbatai area, Tarim Basin[J]. Geophysical and Geochemical Exploration, 2024, 48(6): 1588-1598.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.0015 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I6/1588

Flow chart of seismic fine interpretation technology under strike-slip fault system

Regional location map of the Erbatai area

Original seismic data (a) and processed seismic data (b) in Erbatai area

Seismic section of Inline1872 survey line in Erbatai area

Comparison of top boundary layer attributes of three Suweiyi Formations along Inline1872 survey line in Erbatai area

Multi-level nested fault interpretation diagram

Coherence attribute recognition along the top boundary of Suweiyi Formation in Erbatai area

Ant tracking attribute recognition along the top boundary of Suweiyi Formation in Erbatai area

Likelihood attribute recognition along the top boundary of Suweiyi Formation along Inline1857 survey line in Erbatai area

3D seismic data of Erbatai area

Fault classification diagram of Erbatai area

Erbatai fault evolution pattern diagram

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