北黄海盆地东部坳陷中生界含油气系统研究

北黄海盆地东部坳陷存在中生界含油气系统(!),主要烃源岩为上侏罗统黑色泥岩,储层为上侏罗统和下白垩统砂岩,区域盖层为始新统泥岩。东部坳陷中生界含油气系统形成的关键时刻为始新世,各种油气成藏地质事件具有良好的匹配关系;坳陷中、东部区域烃源岩生烃潜力大,具有良好的油气资源前景,而坳陷西部区域烃源岩生烃潜力较小,油气资源前景较差。

A study on the Mesozoic petroleum system in East depression, North Yellow Sea basin

In East depression,North Yellow Sea basin,there is a Mesozoic petroleum system in which the main active source rocks are late Jurassic black mudstones,the major reservoir rocks are late Jurassic and early Cretaceous sandstones and the regional seals are Eocene mudstones.Eocene is the critical moment of this petroleum system,during which all events of hydrocarbon accumulation were matched each other excellently.In the eastern and central East depression,the source rocks have higher potentials of hydrocarbon generation,resulting in a good prospectiveness of resources.In the western East depression,however,the source rocks are lower in hydrocarbon generation potential and the resources prospectiveness is minor as well.