Abstract
Yinggehai (莺歌海) basin and Jiyang (济阳) depression experienced similar tectonic evolution, which is mainly controlled by the strike-slip faults. The strike pull-apart basins are characteristic by multiple deposition cycles, migration of deposition and subsidence center, and diversity depositional systems. Furthermore, both basins show abnormal formation pressure. Compared with the oil and gas-rich Jiyang depression, Yinggehai basin developed the similar geological background that is favorable to the formation of funnel-shaped meshwork-carpet subtle reservoirs. Overpressure diapir body is the core of hydrocarbon accumulation in central diaper zone of Yinggehai basin. Driven by high pressure, oil and gas migrate along the funnel-shaped passage system into the overlying low-potential zone formed. The overlying sand bodies of overpressure diapirs are the favorable gas exploration zone.
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