断陷盆地洼陷带岩性油气藏成藏动力学模式——以济阳坳陷为例

Dynamics pattern of lithological oil-gas pool forming in subsag belt, downfaulted basin——taking Jiyang Depression as an example

以济阳坳陷为例,运用成藏动力学理论,分析了断陷盆地洼陷带岩性油气藏的成藏过程。研究结果表明,成藏动力贯穿于油气成藏的全过程,油气运移和聚集的原始动力是烃源岩内的孔隙流体压力;油气成藏的主控因素为烃源岩、输导体系和成藏动力;成藏动力学模式为应压双控、复合输导及幕式置换。

Reservoir forming process of the lithological oil-gas pool in sub-sag belt of downfaulted basin,Jiyang Depression,is studied usingpool-forming dynamics theory. It is considered that the reservoir-forming dynamics runs through hydrocarbon accumulation course. Initial power of petroleum migration and accumulation is pore fluid pressure' of source rocks. Main control factors of pool-forming are source rocks, transportation system and dynamics; Pool-forming dynamics pattern is dual control of stress and pressure, duplex passage and episodic replacement.