Basement structures exert a crucial influence on the structural configuration of later rift development: Insights from the Shanan and Chengbei sag, Bohai Bay Basin

Cheng, Yanjun; Wu, Zucheng; Su, Weixu; Chen, Mingming; Zhang, Jie; Liu, Yuqing; Wu, Qingbo

doi:10.1016/j.marpetgeo.2023.106272

Cited by 3 publications

(1 citation statement)

References 60 publications

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“…Whilst this has long been recognized, over the last decade, the quality and resolution of seismic data, especially 3D seismic data, have been significantly improved, which has enabled identification of basement structures within both pre-rift strata and crystalline basement (Collanega et al, 2019;Guan et al, 2023;Osagiede et al, 2020;Phillips et al, 2016;Wu et al, 2020). The exact manner in which basement structures reactivate and the degree that basement structures exert their influence on rift geometry and fault evolution are now well documented (Bird et al, 2015;Cheng et al, 2023;Fazlikhani et al, 2017;Morley, 2014;Phillips et al, 2016Phillips & McCaffrey, 2019;Pichel et al, 2023;Samsu et al, 2023;Shaban et al, 2023;Strugale et al, 2021;Wang et al, 2022;Wu et al, 2020;Ye et al, 2020). However, few studies have considered how, or indeed if, variations in structural heterogeneity influence not only the presence but also the nature of rift segmentation through subsurface seismic data (Clemson et al, 1997;Zhong & Escalona, 2020).…”

Section: Introductionmentioning

confidence: 99%

Rift segmentation caused by reactivation of multiple basement structure systems: Evidence from the Hailar‐Tamtsag Rift, northeast Asia

Wu,

Shen,

Paton

et al. 2024

Basin Research

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Since the influence of structural inheritance on rift geometry has been widely documented, it is easy to assume that rift segmentation, a prominent feature of rift geometry, may have been also influenced by structural heterogeneity. However, limited studies using high‐quality seismic data have considered how basement reactivation is accommodated at individual fault scale and then how this results in rift segmentation at sub‐basin scale. Using extensive high‐quality 3D seismic data and 76 borehole data, we investigate the characteristics of rift architecture, rift‐related fault systems, basement structures and rift evolution in the Hailar‐Tamtsag Rift, northeast Asia. We identify three distinct rift segments which are defined by three rift‐related fault systems and accompanied by three underlying basement structure systems. We recognize three phases of basement reactivation and three types (including five styles) of interactions between basement structures and rift‐related faults. Our study shows that rift segmentation has been caused by reactivation of multiple basement structure systems which not only influence the orientation of rift segments and type of rift architecture, but also control the location, strike, dip and style of the major rift‐related faults. Rift segmentation was completely achieved through multiple phases of basement reactivation, while the main structural framework of segmentation was established through ‘extensive reactivation’ during the second phase extension. Our study examines how multiple basement structure systems control rift segmentation at both individual fault and sub‐basin scales, which can significantly improve our understanding of relationship between structural inheritance and rift segmentation.

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Section: Introductionmentioning

confidence: 99%

Rift segmentation caused by reactivation of multiple basement structure systems: Evidence from the Hailar‐Tamtsag Rift, northeast Asia

Wu,

Shen,

Paton

et al. 2024

Basin Research

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Inhomogeneous strain partitioning in the Cenozoic Bohai Bay Basin controlled by pre-existing crustal fabrics and oblique subduction: Insights from the Jizhong and Huanghua subbasins

Su,

Chen,

et al. 2024

Marine and Petroleum Geology

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The Strike-Slip Fault System and Its Influence on Hydrocarbon Accumulation in the Gudong Area of the Zhanhua Depression, Bohai Bay Basin

Zhou,

Wu,

Wang

et al. 2024

Processes

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The Gudong area contains abundant petroleum resources. Previous studies have mainly focused on the extension structure in this area, with its strike-slip characteristics remaining poorly understood. In this study, the geometry of the strike-slip faults in the Gudong area was investigated using high-resolution 3D seismic reflection and drilling data, as were their associated releasing and restraining structures. Based on the profile’s flower structure and the plane’s horsetail splay pattern, the Gudong fault in the study area can be characterized as a dextral strike-slip. Three types of strike-slip fault-associated structures can be identified in the study area: (a) a restraining bend occurring in the right-stepping area of the S-shaped Gudong strike-slip fault, (b) a restraining bend identified in the left-stepping, overlapping zone of the Gudong and Kendong faults, and (c) a releasing bend seen in the extensional horsetail splay structure at the southern end of the Gudong fault. The restraining stress induced the formation of a fault-related open anticline, which led to a significant increase in fault sealing efficiency, thereby preserving an estimated 75.479231 million tons of oil and 15.28317145 billion cubic meters of gas. Conversely, releasing transtensional stress has compromised the effectiveness of the traps, preventing hydrocarbon retention. Consequently, oil and gas have migrated upward along the horsetail faults to the top of Cenozoic formations and have then dispersed.

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Basement structures exert a crucial influence on the structural configuration of later rift development: Insights from the Shanan and Chengbei sag, Bohai Bay Basin

Cited by 3 publications

References 60 publications

Rift segmentation caused by reactivation of multiple basement structure systems: Evidence from the Hailar‐Tamtsag Rift, northeast Asia

Rift segmentation caused by reactivation of multiple basement structure systems: Evidence from the Hailar‐Tamtsag Rift, northeast Asia

Inhomogeneous strain partitioning in the Cenozoic Bohai Bay Basin controlled by pre-existing crustal fabrics and oblique subduction: Insights from the Jizhong and Huanghua subbasins

The Strike-Slip Fault System and Its Influence on Hydrocarbon Accumulation in the Gudong Area of the Zhanhua Depression, Bohai Bay Basin

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