渤南洼陷沙一段夹层型页岩油界定标准及富集主控因素  

Analysis on recognition criteria and enrichment factors of interlayer shale oil of Es_1 in Bonan subsag

作　　者：朱德顺[1] 王勇[1] 朱德燕[1] 宁方兴[1] 杨万芹[1] 宗邈 银燕[1] 丁桔红[1] 

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 [2]长江大学地球环境与水资源学院,湖北武汉430100

出　　处：《油气地质与采收率》2015年第5期15-20,共6页Petroleum Geology and Recovery Efficiency

基　　金：国家"973"计划"中国东部古近系陆相页岩油富集机理及分布规律"子课题"陆相页岩油富集要素与有利区预测"(2014CB239104)

摘　　要：渤南洼陷沙一段泥页岩中发育厚度不等的夹层,借鉴页岩气国家界定标准和中国石化页岩油厚度企业标准来确定页岩油夹层的厚度,将单个夹层厚度小于2 m、累积夹层厚度小于层组厚度的20%作为渤南洼陷夹层型页岩油的划分依据。渤南洼陷沙一段泥页岩夹层的岩性以白云岩为主,测井响应上具有明显的高阻特征,油气产出过程中含水率逐渐上升,表现为以游离态为主的油气赋存状态。通过分析夹层型页岩油富集要素与产量之间的相关性,认为夹层型页岩油富集产出主要受控于生排烃条件、夹层厚度、夹层物性、地层压力和原油物性等因素。Limestone interlayers with different thickness develop in thick shale formation of Es1 in Bonan subsag. Learning from the national standard of shale gas and SINOPEC standard of shale oil,the thickness of interlayer that produces oil was determined. The criteria,the thickness of single interlayer is less than two meters and the cumulative thickness of interlayer is less than 20% of that of the formation,were regarded as the recognition standard for interlayer shale oil in Bonan subsag.The interlayer at the lower part of Es1 mainly consists of dolomite and its log response is characterized by obvious high resistivity. The water cut is gradually increased in the process of oil and gas output,which supports the point that the shale oil from interlayer mainly exists in free state. By analyzing the correlation between production capacity and enrichment factors of interlayer shale oil,it is found that whether interlayer shale oil can effectively accumulate is mainly controlled by four factors including generation and discharge condition of hydrocarbon,thickness of interlayer,physical conditions of interlayer and formation pressure and oil properties.

关 键 词：夹层 页岩油 沙一段 赋存状态 主控因素 渤南洼陷 

分 类 号：TE112[石油与天然气工程—油气勘探]