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本文依托CSDP-2全取心井岩心及38块烃源岩样品的实测TOC、氯仿沥青“A”、镜质体反射率、生烃潜量等一系列地化测试数据,在精确识别南黄海盆地中部隆起中-古生界沉积相类型的基础上,分析多组段、多岩相烃源岩的有机质丰度、类型和成熟度特征,并结合前人研究成果,对比该区与下扬子苏皖地区主要烃源岩的差异性,探讨南黄海盆地中-古生界油气勘探前景。结果表明,南黄海盆地在中-古生代共经历6次较大规模的海侵-海退,由海向陆方向发育完整的浅海陆棚-障壁海岸-三角洲沉积体系且充填了浅水内陆棚、镶边碳酸盐岩台地及潮坪-泻湖和三角洲前缘等连续的沉积演化序列;海盆内栖霞组、龙潭组、大隆组和青龙组4套烃源岩品质与陆区相当,同属中等-最好烃源岩级别;垂向上则以龙潭、大隆组源岩质量最高且不乏优质烃源岩的存在,青龙组源岩品质稍低但同样有效;丰富的烃类物质基础、7套全烃、荧光高幅上升段及累计40余处油浸、油斑等直接油气显示彰显了南黄海中-古生界海相地层存在着巨大的油气勘探潜力。
In this paper, based on a series of geochemical test data, such as the measured TOC, chloroformic bitumen “A”, vitrinite reflectance and hydrocarbon generation potential of CSDP-2 coring well and 38 hydrocarbon source rock samples, Based on the types of mid-uplift Mesozoic-Paleozoic sedimentary facies in the central basin, the organic matter abundance, type and maturity characteristics of multi-group and multi-petrographic source rocks are analyzed. Based on the previous research results, Differences of Main Source Rocks in Jiangsu and Anhui Provinces and Exploration of Prospect of Mid - Paleozoic Hydrocarbon Exploration in South Yellow Sea Basin. The results show that in the middle Yellow Sea Basin, the Yellow Sea basin experienced six large-scale transgression-receding processes in the Meso-Paleozoic and a complete shallow-sea shelf-barrier coastal-delta sedimentary system developed from sea to land, filled with shallow inland shelters, The succession of successive sedimentary evolution sequences of striped carbonate platform and tidal flat-lagoon and delta front; the quality of the four sets of source rocks in Qixia Formation, Longtan Formation, Dalong Formation and Qinglong Formation in the basin is similar to that in the continental belt, - the best source rock level; vertical Longtan, Dalong Formation source rock quality is highest and there is no lack of high quality source rocks, Qinglong Formation source rock quality is slightly lower but equally effective; rich hydrocarbon material base, 7 sets All hydrocarbon, high-rise fluorescent segments and more than 40 total oil-immersed, oil spots and other direct oil and gas show highlights the South Yellow Sea - Paleozoic marine strata there is a huge potential for oil and gas exploration.