海陆对比看南黄海海相中-古生界的生储盖组合特征

作为下扬子主体的南黄海盆地发育分布广泛、厚度大且较全的中-古生代海相地层，通过对比扬子陆域的烃源岩、储层及盖层特征，结合南黄海盆地近几年采集的地震剖面、钻井资料以及陆上野外露头资料，总结和分析了南黄海海相中-古生界的生储盖组合特征。南黄海海相地层发育下寒武统荷塘组/幕府山组、下志留统高家边组、下二叠统栖霞组和二叠系龙潭-大隆组4套烃源岩，对比扬子区陆域烃源岩特征，确定为较好的烃源岩。苏北-南黄海盆地储集层以碳酸盐岩为主，发育白云岩孔隙储层、礁滩相储层、风化壳储层和裂隙储层4种类型。研究认为南黄海发育扬子陆区已发现的典型油气藏的成藏层位，海相地层发育3套区域性的盖层和3套完整的生储盖组合，具有很好的油气远景。 

Source-reservoir-seal assemblage of marine Mesozoic-Paleozoic in South Yellow Sea Basin by land-ocean comparison

The South Yellow Sea Basin is the main body of the Lower Yangtze area, where marine Mesozoic-Paleozoic strata are widely distributed. The characteristics of source-reservoir-seal assemblage of the marine Mesozoic-Paleozoic strata in the South Yellow Sea Basin were analyzed by comparing the characteristics of hydrocarbon source rocks, reservoir and cap rocks, and combining with seismic sections, drilling and outcrop data. Four sets of hydrocarbon source rocks developed, including the Lower Cambrian Hetang and Mufushan formations, the Lower Silurian Gaojiabian Formation, the Lower Permian Qixia Formation, and the Upper Permian Longtan and Dalong formations. By comparing the characteristics of hydrocarbon source rocks of the Yangtze land area, the source rocks of the South Yellow Sea Basin may be classed as good hydrocarbon source rocks. Carbonate is the main reservoir type in the South Yellow Sea area, and there are four carbonate reservoir types: porous dolomitic, reef-bank, weathered crust and fractured. The marine strata of South Yellow Sea Basin developed three sets of regional cap rocks and three sets of complete assemblages. The South Yellow Sea Basin has very good oil and gas prospects.