辽河盆地东部凹陷北部地区Es1+2/Es3不整合面与油气运聚的关系

根据 2 2 4口井的实际资料 ,结合地层沉积特征和地震剖面解释结果对辽河盆地东部凹陷北部地区Es1+ 2 /Es3 不整合面的上、下地层的接触关系及岩性组合特征进行了平面规划及分类 ,探讨了该不整合面与油气运聚的关系。研究结果表明 ,不整合面在油气运聚过程中所起的作用主要是由不整合面上、下地层的接触关系及岩性配置所决定。研究区凹陷北部茨 5 9井—茨 80井、龙 12井—龙 2 4井等区域为寻找不整合面之下遮挡油气藏的有利地区 ,茨 6 7—茨 6 15区域是该不整合面之上油气聚集的有利区

Relationship of unconformity of Es1+2/Es3 in northern region of east depression in Liaohe Basin with hydrocarbon migratio and accumulation

Stratigraphic unconformity has an important affect on the migration and accumulation of oil and gas. Taking the unconformity of Es_(1+2)/Es_3 in the northern region of east depression of Liaohe Basin as a case, the relation of unconformity with hydrocarbon migration and accumulation was studied. The realistic data of 224 wells were analyzed, and three types of unconformity styles and six types of lithologic collocation between the upper and down layers of the unconformity surfaces in the studied region were distinguished, according to the stratigraphic sedimentary features and the results of seismic section interpretation. Moreover, the roles of each type of unconformity surface and lithologic collocation in hydrocarbon migration and accumulation were discussed. The favorable targets for finding oil and gas reservoirs related with the unconformity surface in this region was pointed out.