渤南洼陷沙四上—沙三下亚段含油气系统分布特征  

Distribution characteristics of petroleum system from Upper Es_(4) to Lower Es_(3) in Bonan Sag

作　　者：王东晔 WANG Dongye(Research Institute of Exploration and Development,Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257015,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《东北石油大学学报》2021年第2期1-9,I0001,共10页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2016ZX05006)。

摘　　要：渤南洼陷中深层油气富集规律认识不清。采用地质分析、实验测试、盆地模拟等方法,综合分析研究区沙四上—沙三下亚段含油气系统。结果表明:沙四上—沙三下亚段含油气系统是渤南洼陷含油气系统的主体构成部分,沙三下亚段生成的烃类主要发生垂向运移,在洼陷中心及断阶带的古近系和新近系进行聚集;沙四上亚段生成的烃类侧向运移更为明显,在断阶带、湖盆边缘及斜坡等地区发生运移聚集。渤南洼陷沙四上—沙三下亚段含油气系统的分布主要受烃源灶控制,各类扇体及次生孔隙是油气有利的储集体及储集空间,广泛发育的膏盐层和泥岩为研究区提供良好的油气保存条件,断层—砂体—不整合面等复合输导体系控制油气的有序分布;复式含油气系统是陆相断陷湖盆的重要特征。该结果对渤南洼陷和其他类似地区的油气勘探具有指导意义。The oil and gas enrichment pattern in Bonan Subsag remains unclear,so the petroleum system from Upper E s 4 to Lower E s 3 in the area is comprehensively analyzed by means of geological analysis,experimental test and basin simulation.The results show that the petroleum system from the Upper E s 4 to Lower E s 3 is the main component of the petroleum system in Bonan Subsag.The hydrocarbons generated in the Lower E s 3 mainly migrate vertically and accumulate in the Paleogene and Neogene of the depression center and fault terrace belt,the lateral migration of hydrocarbons generated in the Upper E s 4 is more obvious,and migration and accumulation occur in fault terrace zone,lake basin edge and slope.The distribution of petroleum system from the Upper E s 4 to Lower E s 3 of Bonan Sag is mainly controlled by hydrocarbon source foci.All kinds of fans and secondary pores are favorable reservoir and reservoir space for oil and gas.The widely developed gypsum salt beds and mudstones provide favorable conditions for oil and gas preservation in the study area.The composite transportation system of fault sand body unconformity controls the orderly distribution of oil and gas.Compound petroleum system is an important feature of continental fault depression lake basin.The research results can effectively guide oil and gas exploration in Bonan Sag and other similar areas.

关 键 词：含油气系统 侧向运移 垂向运移 有序分布 沙三下亚段 沙四上亚段 渤南洼陷 

分 类 号：P618.13[天文地球—矿床学] TE121.1[天文地球—地质学]