不同构造单元油水分布规律及其主控因素研究  

Study on the distribution patterns and main control factors of oil and water in different structural units

作　　者：李顺欣 张景军[1] 郝婉琳 苏学龙 LI Shunxin;ZHANG Jingjun;HAO Wanlin;SU Xuelong(School of Earth Sciences,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318

出　　处：《甘肃科学学报》2024年第6期80-88,共9页Journal of Gansu Sciences

基　　金：国家自然科学基金项目(41472125)。

摘　　要：由于葡萄花油层各构造单元油水分布复杂,为了掌握徐家围子向斜区的油水分布规律,在对研究区构造单元精细划分的基础上,分析不同构造单元的油水分布及主控因素。研究发现,研究区可分为3个构造单元,油水分布主要呈现为上油下水,各构造单元油水富集层位不同,主要因为其在油藏成因上有所差异:(1)洼槽区主要为反向源断裂充注,由弱-双强两种充注模式为其供烃,且圈闭由断层及断层与岩性共同作用形成;(2)南部斜坡区主要为反屋脊源断裂充注;(3)北部斜坡区为屋脊源断裂及反向源断裂充注。斜坡区主要为强充注模式,且圈闭主要以构造作用形成。该研究结果对认识不同构造单元的油气成藏规律以及指导油气勘探具有参考意义。In order to master the distribution of oil and water in Xujiaweizi syncline,the distribution of oil and water in different structural units and the main controlling factors are analyzed on the basis of the fine division of structural units in Xujiaweizi.It is found that the study area can be divided into three structural units,and the distribution of oil and water mainly presents as upper oil and water.The oil-water enrichment layers of each structural unit are different,mainly because of their differences in reservoir genesis:(1) The trough area is mainly charged by the reverse source fault,which is supplied with hydrocarbon by the weak and double strong charging modes,and the trap is formed by the fault and the interaction of fault and lithology.(2) The southern slope area is mainly charged by the reverse ridge source fault.(3) The northern Slope area is charged by the ridge source fault and the reverse source fault.The slope area is dominated by strong charging mode,and the trap is mainly formed by tectonic process.The research results are of reference significance for understanding the hydrocarbon accumulation rules of different structural units and guiding oil and gas exploration.

关 键 词：徐家围子向斜 构造单元 洼槽区 油水分布 主控因素 

分 类 号：TE122[石油与天然气工程—油气勘探]