【摘要】 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。更多还原

【Abstract】 In the Chenghai high-slope of the Dagang oilfield,the large-scale lithologic traps in Paleogene Shahejie Formation has became an important exploration area,because of the favorable conditions on oil-gas migration and accumulation.But the ground-surface complexity and limited understanding have restrained the exploration process for a long time.Recent years,the oil-gas exploration on Paleogene lithologic traps has made great breakthrough by deepening the geologic cognitions and changing the exploration ideas.The lithologic trap in the Chenghai high-slope has the intimate correlation with paleo-gulch of Chengning uplift.Moreover,the types and distribution of paleo-gulch made great influence on the shapes and boundary limit of lithologic traps.We considered that the seismic attributes and well restrain inversion would be the effective methods on predicting the reservoir distribution,sand boundary and thickness changing.This result will give an implication to guide the oil-gas exploration on the similar conditions of lithologic traps in the Qikou sag.更多还原