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埕海高斜坡区构造上位于黄骅坳陷埕海断坡区南部缓坡区,勘探面积600 km2,受羊二庄—羊二庄南断层和埕宁隆起控制,古近系地层北厚南薄,向南逐渐尖灭于埕宁隆起北坡。长期发育的主干断裂和不整合面为沟通歧口凹陷的油气资源提供了优越的运移通道,同时该区古近纪时期南部物源充足,发育多个大型的辫状河三角洲沉积,储层物性良好,是形成地层岩性油气藏的有利地区。由于该区开展勘探工作较晚,基础研究仍相对薄弱,尤其是近物源、砂体多期叠置且横向变化快的难题给地层岩性油气勘探带来较大困难,也对勘探技术提出了更高的要求,笔者以埕海高斜坡区勘探实践为例,在对该区基础地质特征研究的基础上,充分运用三维可视化、地震多属性分析及井约束反演等技术和方法,结合前期钻探成果,科学合理的开展埕海高斜坡区古近系沙一段大型岩性圈闭的边界刻画与储层含油气预测等工作,有效地克服了储层识别与含油气预测中的多解性,提高了地层岩性油气藏勘探的成功率。
The Gaohai slope area is structurally located in a gentle slope area in the southern part of the Chenghai Slope Area in the Huanghua Depression with a exploration area of 600 km2. Controlled by the Yangzierzhuang-Yang’erzhuangnan fault and the Suining uplift, Gradually pinch out to the south of Su Ning north slope. Long-term development of main faults and unconformities provide favorable migration channels for communication of oil and gas resources in the Qikou sag. At the same time, there are abundant provenances in the southern part of the Paleogene and a large number of large braided river delta deposits and reservoirs Good physical properties, formation of lithologic reservoirs favorable area. Due to the late exploration work in this area, the basic research is still relatively weak. In particular, the problems of near-provenance and sand bodies superimposed and rapidly changing in horizontal direction bring great difficulties to the exploration of formation lithology oil and gas, and also put forward the exploration technology Based on the study of basic geological features in this area, the author makes full use of technologies and methods such as three-dimensional visualization, multi-attribute seismic analysis and well constrained inversion, etc. The preliminary drilling results scientifically and reasonably carry out the boundary characterization of the lithologic trap of the first member of the Paleogene in the Gaohai Slope and the prediction of reservoir petroliferous oil and effectively overcome the multiple solutions in reservoir identification and petroleum prediction It improves the success rate of stratigraphic lithologic reservoir exploration.