Hydrocarbon Potential of Pre-cenozoic Strata in the North Yellow Sea Basin

Hydrocarbon Potential of Pre-cenozoic Strata in the North Yellow Sea Basin
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发表时间：
2005
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通讯作者：
蔡峰;戴春山;陈建文;李刚;孙萍
蔡峰;戴春山;陈建文;李刚;孙萍
中科院分区：
其他
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作者：
蔡峰;戴春山;陈建文;李刚;孙萍

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北黄海盆地发育于北中国陆块(华北)基底之上，是该海域典型的陆相中新生代沉积盆地。它的中生代盆地是一个残留盆地，其下方可能有一个较大的古生代沉积盆地。北黄海盆地由四个凹陷和三个隆起组成。其中，东部凹陷为NYSB中新生代沉积凹陷，沉积厚度最大；目前韩国的钻井主要集中在东部凹陷。该凹陷油气资源相对丰富，具有较好的海域油气远景，中部凹陷还发育中新生代厚层沉积。最新研究成果表明，北黄海盆地存在三套烃源岩，即古近纪黑色页岩、侏罗系黑色页岩和白垩系黑色页岩。NYSB的主要烃源岩为中生代黑色页岩。根据韩国的钻井资料，古近系、侏罗系和白垩系的黑色页岩都达到了优质成熟烃源岩的标准。NYSB拥有完整的生油、储集层和盖层系统，有助于盆地中油气的形成，因此具有巨大的油气潜力。油气资源的垂向分布主要集中在白垩纪，其次是侏罗系。
The North Yellow Sea Basin ( NYSB ), which was developed on the basement of North China (Huabei) continental block, is a typical continental Mesozoic-Cenozoic sedimentary basin in the sea area. Its Mesozoic basin is a residual basin,below which there is probably a larger Paleozoic sedimentary basin. The North Yellow Sea Basin comprises four sags and three uplifts. Of them, the eastern sag is a Mesozoic-Cenozoic sedimentary sag in NYSB and has the biggest sediment thickness; the current Korean drilling wells are concentrated in the eastern sag. This sag is comparatively rich in oil and gas resources and thus has a relatively good petroleum prospect in the sea.The central sag has also accommodated thick Mesozoic-Cenozoic sediments. The latest research results show that there are three series of hydrocarbon source rocks in the North Yellow Sea Basin, namely, black shales of the Paleogene, Jurassic and Cretaceous. The principal hydrocarbon source rocks in NYSB are the Mesozoic black shale. According to the drilling data of Korea, the black shales of the Paleogene,Jurassic and Cretaceous have all come up to the standards of good and mature source rocks. The NYSB owns an intact system of oil generation, reservoir and capping rocks that can help hydrocarbon to form in the basin and thus it has the great potential of oil and gas. The vertical distribution of the hydrocarbon resources is mainly considered to be in the Cretaceous and then in the Jurassic.