渤海湾盆地隐性断裂带识别及其地质意义

周维维; 王伟锋; 安邦; 胡瑜

doi:10.3799/dqkx.2014.145

Volume 39 Issue 11

Nov. 2014

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Zhou Weiwei, Wang Weifeng, An Bang, Hu Yu, 2014. Identification of Potential Fault Zones and Its Geological Significance in Bohai Bay Basin. Earth Science, 39(11): 1527-1538. doi: 10.3799/dqkx.2014.145

Citation:

Zhou Weiwei, Wang Weifeng, An Bang, Hu Yu, 2014. Identification of Potential Fault Zones and Its Geological Significance in Bohai Bay Basin. Earth Science, 39(11): 1527-1538. doi: 10.3799/dqkx.2014.145

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Identification of Potential Fault Zones and Its Geological Significance in Bohai Bay Basin

doi: 10.3799/dqkx.2014.145

School of Geosciences, China University of Petroleum, Qingdao 266580, China

Received Date: 2014-06-05
Publish Date: 2014-11-01

Abstract

Abstract

Potential fault zones refer to the fault zones which are influenced by regional or local stress field, basement rift activities, buried hill blocks twist and formed in the cover layer of sedimentary basin. It is a type of fault zone associated with dominant fault, which is often ignored because of the absence of inherent characteristics of dominant faults. It can be identified from 7 aspects below: ① large potential fault zones reflected by en-echelon, intermittent, dislocation of symmetrical arranged small dominant structure (small faults, small folds, fault blocks); ② potential fault zones produced by basement rift system activities; ③ linear, accommodated or side arranged potential fault zones formed by buried hills and sags; ④ potential fault zones reflected by the distribution of sandstone bodies; ⑤ potential fault zones reflected by the distribution, arrangement and strike of reservoirs; ⑥ potential fault zones reflected by coherent body slices; ⑦ potential fault zones formed by local stress field of overlapped fault, segment activities of deep and large faults. Taking the Bohai Bay basin as an example, a classification scheme of potential fault zone is established based on research results at home and abroad, and the characteristics of the potential faults in different levels of tectonic units are discussed. Potential fault zones are proved to be of geological significance in the following aspects. Firstly, it affects the tectonic pattern of basins by adjusting the inhomogeneous extension activities among different faulted blocks in basins and by separating the tectonic units such as sags and uplifts etc.. Secondly, it determines the development and distribution of basin sedimentary facies and influences the distribution range of the sandstone in faulted basin. Thirdly, it yields bead string-like, belt-like, and ring-like oil-gas accumulation zones. The activities of deep faults are prone to induce earthquake and form the potential fault zones on the surface. Therefore, identification and analysis of potential fault zones can be important in reality.
- potential fault zone,
- basement-involved fault,
- en-echelon,
- buried hill,
- transfer zone,
- hydrocarbon accumulation,
- petroleum geology

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References(33)

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Identification of Potential Fault Zones and Its Geological Significance in Bohai Bay Basin

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