PETROLEUM GEOLOGIC CHARACTERISTICS ANALYSIS AND FUTURE EXPLORATION TARGETS FOR MARINE STRATA IN THE SOUTH YELLOW SEA BASIN
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摘要: 南黄海海相层地震资料采集技术获得重大进展,在新资料基础上,通过收集南黄海盆地及周边地区钻井、地震、分析化验等资料,对其进行石油地质条件分析。认为南黄海海相层分布稳定,残留厚度较大,存在五套烃源岩、二类储层、四套盖层、四套生储盖组合,具备形成大型油气藏的油气地质条件;指出海相下组合的有利勘探远景区为崂山断隆带的中西部,海相上组合的有利勘探远景区为青岛坳陷带和勿南沙隆褶带的西部,其中下组合的崂山断隆带中西部是首选勘探远景区。Abstract: The progress in seismic acquisition technology for marine strata has made the advanced study on marine Mesozoic-Palaeozoic strata possible in the South Yellow Sea Basin. Based on the new seismic data and other data of geology, geophysics and geochemistry collected from the South Yellow Sea Basin and surrounding regions, we discussed in this paper the petroleum geologic characteristics of the South Yellow Sea Basin, and prospecting targets for marine strata were selected. The study results suggested that marine Mesozoic-Palaeozoic strata have a steady distribution in the study area with thick residual deposits including 4 suites of source rocks, 2 categories of reservoirs, 4 suites of mudstone cap rocks, which form favorable source-reservoir-cap assemblages for the formation of hydrocarbon accumulations. There are two good exploration prospect targets:the middle and western part of the Laoshan fault-uplifting belt where targets are available in the lower marine structural layer, and the Qingdao depression and the western part of Wunansha folded belt where targets occur in the upper marine structural layer and the middle and western part of Laoshan fault-uprising belt are the best targets for exploration.
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