南黄海中部隆起中—古生界沉积相及烃源岩特征——以CSDP-2井为例

发布时间：2018-11-27 11:30

【摘要】：依托CSDP-2全取心井岩心及38块烃源岩样品的实测w(TOC)、w(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—古生代共经历了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;垂向上则以龙潭组、大隆组源岩品质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。
[Abstract]:Based on the measured w (TOC), w (chloroform bitumen "A", vitrinite reflectance, hydrocarbon generation potential and so on, a series of geochemistry test data, such as CSDP-2 coring well core and 38 source rock samples, are used. Based on the accurate identification of the Meso-Paleozoic sedimentary facies types in the middle uplift of the southern Huang Hai basin, the abundance, type and maturity characteristics of organic matter in the multi-member and multi-lithofacies source rocks are analyzed, and the previous research results are combined. By comparing the difference of the main source rocks between this area and the Lower Yangtze Jiangsu and Anhui areas, the prospect of the Meso-Paleozoic oil and gas exploration in the southern Huang Hai basin is discussed. The results show that the southern Huang Hai basin experienced 6 large scale transgression-sea regression in the Mesozoic and Paleozoic, and developed a complete shallow sea shelf barrier coast delta sedimentary system from the sea to the land and filled the shallow water inland shelf. Rimmed carbonate platform, tidal flat lagoon and delta front and other continuous sedimentary evolution sequences; The 4 sets of source rocks of Qixia formation, Longtan formation, Dalong formation and Azure Dragon formation in the basin are similar to those in the continental area, and belong to the middle and best source rock classes. In the vertical direction, the Longtan formation, the Dalong formation and the Dalong formation have the highest quality and no lack of the high quality source rocks, while the Azure Dragon formation has a lower source rock quality but is equally effective. The abundant hydrocarbon material base, 7 sets of total hydrocarbon, high fluorescence rising section and accumulated 40 places of oil leaching, oil spots and other direct oil and gas show that there is great oil and gas exploration potential in the Meso-Paleozoic marine strata of South Huang Hai.
【作者单位】：青岛海洋地质研究所;青岛海洋科学与技术国家实验室/海洋矿产资源评价与探测技术功能实验室;国土资源部海洋油气资源与环境地质重点实验室;
【基金】：国家海洋地质专项项目(DD20160147) 国家重点基础研究发展计划(“973”计划)项目(2013CB429701) 国家自然科学基金项目(41210005)~~
【分类号】：P618.13

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