Oil & Gas Geology ›› 2011, Vol. 32 ›› Issue (2): 273-279.doi: 10.11743/ogg20110216
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Abstract: Fault is one of the major factors that control hydrocarbon accumulation in the Bohai Sea waters. Based on seismic interpretation and structural mapping, this paper focuses on the characteristics and formation mechanisms of the Cenozoic faults in the Bohai Sea waters. In the study area, extensional and strikeslipping faults are the most predominant, and inverted faults are locally distributed. On plane view, most of the faults are of NE, NW or EWtrend, and the NEtrending faults mostly belong to the Tanlu strikeslip faut zone. While on sectional view, the faults occur as flower structures. The NWtrending faults are associated with the ZhangjiakouPenglai strikeslip fault zone, and constitute a conjugate shear faults system with the NEtrending faults during the neotectonic stage. The near EWtrending faults can be classified into two types according to their scale. The largescale EWtrending faults, acting as the boundary faults between the salient and trough in the southern part, experienced the early extensional and late strikeslipping movements. They exhibit quasiflower structures composed of major listric faults and shallow branching strikeslipping faults on the section. The smallscale EWtrending faults are densely developed in the shallow strata, and they are mostly derivative faults resulted from the strikeslipping movement of the Tanlu fault zone.
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URL: http://ogg.pepris.com/EN/10.11743/ogg20110216
http://ogg.pepris.com/EN/Y2011/V32/I2/273