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南沙海区沉积盆地油气资源评价及重点勘探地区

, PP. 418-410

Keywords: 南沙,盆地,油气资源,评价

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Abstract:

我国南沙海域分布有曾母、万安、南沙海槽、礼乐等众多盆地。这些新生代沉积盆地构造类型多、面积大,新生界巨厚,邻近陆坡的大陆架十分宽广,塑造了多个三角洲,是重要的含油气资源区。盆地的主要烃源岩为渐新世―中中新世湖相泥岩以及下海岸平原沉积。储层发育有砂岩、灰岩(礁灰岩)、基岩等。区域性盖层为上新统―第四系广海相泥质岩。南沙海域含油气构造,具有规模大,隆起幅度高,类型多,成群成带分布等特点。应用波阻抗、烃类检测或模式识别等处理技术,通过盆地模拟技术和沉积岩体积法对南沙海域进行了油气资源评价,其总资源量为581.0047×108t,属于我传统海疆线内达372.0704×108t。文中最后指出曾母盆地的西、北部,万安盆地的南部和南沙海槽盆地的北部是近期重点勘探地区。

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