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埕海高斜坡区古近系沙河街组发育多个大型岩性圈闭,油气运聚条件有利,是岩性油气藏发育的有利地区。但长期以来,由于地表和地下地质条件复杂以及认识上的局限,限制了该区岩性圈闭的勘探进程。近年来通过创新思维,转变思路,按照隐蔽油气藏勘探思路深入研究沙河街组岩性圈闭的控制因素及识别技术,取得了显著的成果。认为埕海高斜坡区沙河街组岩性圈闭与埕宁隆起发育的古沟谷关系密切,并且古沟谷的类型和分布控制着岩性圈闭的发育形态和边界范围,同时沉积体系的不同相带是岩性圈闭有利发育部位的关键因素之一。总结出地震属性和井约束反演技术是宏观预测砂体展布、明确砂体边界和厚度变化的有效手段。
There are several large-scale lithologic traps developed in the Paleogene Shahejie Formation in the Gaohai-Slope area, and favorable hydrocarbon migration and accumulation conditions are favorable for the development of lithologic reservoirs. For a long time, however, the exploration of lithologic traps has been limited due to the complex geological and subsurface geological conditions and their limited understanding. In recent years, through innovative thinking, changing train of thought, in accordance with subtle reservoir exploration ideas in-depth study of Shahejie Formation lithologic traps control factors and identification techniques, and achieved remarkable results. It is concluded that the lithologic traps of Shahejie Formation in the Gaohai Slope are closely related to the paleo-valleys developed in the Suining and that the types and distribution of paleo-valleys control the developmental morphology and boundary of the lithologic traps. At the same time, Belt is one of the key factors for the favorable development of lithologic traps. It is concluded that seismic attributes and well constrained inversion are effective measures for macroscopically predicting the distribution of sand bodies and clarifying the changes of sand body boundaries and thickness.