• 责任者：Wu Kongyou (Faculty of Geosciences and Technique ; China University of Petroleum ; Qingdao 266555 ; China) ; Bai Sen
• 刊名：Petroleum Geology & Experiment
• 出版年：2012
• 卷期：34(4)
• 关键词：油气藏 ; oil and gas reservoir ; 不整合圈闭 ; unconformity traps ; 惠民凹陷 ; Huimin Sag
• 页码：p.357-361
• 图表：2 illus., 24 refs.
• 分类号：1003
• issnNo：ISSN1001-6112
• isbnNo：CN32-1151/TE

In the southern slope of the Huimin Sag of the Jiyang Depression in the Bohai Bay Basin, 3 types of unconformity were found on the top of Mesozoic, including truncation, onlap and parallel ones. The unconformities were divided into 3 layers vertically, including basal conglomerate or transgressed sand body, weathered clay and eluvial zone. Each layer has its own logging response characteristics and identification marks.  Due to the different lithology of each layer, 7 patterns of lithology configuration were formed. According to core observation and sample test, secondary pores generated in the eluvial zone of unconformity in Qudi area. The unconformity served as the pathway for petroleum migration, and also provided the space for accumulation.