摘要
以渤海湾盆地东营凹陷和沾化凹陷渐新统沙河街组沙三下亚段和沙四上亚段泥岩为研究对象,从油气生成、运移、富集的角度,对高产页岩油富集要素进行系统研究,结合油气产能、油气组分、地层接触关系、含油饱和度以及压力系数等特征,将东营凹陷和沾化凹陷页岩油富集类型分为3种:自生自储式、断层连通式和夹层富集式。自生自储式页岩油在东营凹陷和沾化凹陷泥页岩地层中广泛存在,受油气生成、储集条件影响,此类型页岩油井产能相对较低;断层连通式和夹层富集式页岩油受构造、岩性的控制,分布虽然局限但油气产能高。明确了页岩油的富集规律后,可以制定针对性更强的勘探开发方案,从而提高页岩油勘探开发效率。
Taking the shale of Lower Sha-3 member and Upper Sha-4 member of Oligocene Shahejie formation in Dongying sag and Zhan-hua sag of Baohai Bay basin as a case,this paper systematically studies the enrichment elements of high-yielding shale oil from the perspec-tive of oil and gas generation,migration and accumulation.Integrated with the characteristics of oil and gas productivity,hydrocarbon com-ponent,stratigraphic contact relationship,oil saturation and pressure coefficient,the accumulation patterns in Dongying sag and Zhanhuasag can be divided into such 3 types as self-generation and self-preservation,fault connection and interlayer enrichment.Shale oil of self-generation and self-preservation widely exists in the shales of the 2 sags,but since it is influenced by the conditions of hydrocarbon genera-tion and accumulation,the oil well productivity of this type is relatively low.Constrained by structure and lithology,the other 2 types aredistributed in some local areas but have high productivity.After the identification of shale oil accumulation patterns,more targeted planscan be made for oil exploration and development,thus enhancing efficiency of exploration and development of the shale oils.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2016年第3期270-274,共5页
Xinjiang Petroleum Geology
基金
国家科技重大专项(2016ZX05049004)
中国石化科技攻关项目(P15086)
关键词
渤海湾盆地
东营凹陷
沾化凹陷
沙河街组
页岩油
富集规律
Bohai Bay basin
Dongying sag
Zhanhua sag
Shahejie formation
shale oil
accumulation pattern
