吴起油田油沟油区长7油藏分布规律研究  

Research on Distribution of Chang 7 Oil Reservoir in Yougou Block of Wuqi Oilfield

作　　者：李帮军 程永福 李炜[1] 申太志 LI Bang-jun;CHENG Yong-fu;LI Wei;SHEN Tai-zhi(Yanchang Oil Field Co.,Ltd.Wuqi Oil Production Plant,Yan’an 717600,China)

机构地区：[1]延长油田股份有限公司吴起采油厂,陕西延安717600

出　　处：《化工管理》2021年第30期189-191,共3页Chemical Engineering Management

摘　　要：油沟油区近年来新发现的长7油藏,其分布规律认识不清,开发效果较差。为进一步研究油气富集规律,通过分析沉积相、烃源岩与构造关系;结合油藏剖面与平面分布特征,认为研究区长7油层主要烃源岩为张家滩畔页岩,油气进行简单的初次运移后向高部位富集;长7具有幕式排烃、裂缝疏导、多点式充注、大规模成藏的特点,从生烃方面来说,处于生烃中心以东,以垂向运移为主,侧向运移为辅;延长组下组合油层处于伊陕斜坡,构造运动对储层的改造作用较弱。张家滩页岩较厚的区域可能油气富集,也是未来油藏勘探的有利区域。长7-1小层分布面积广、连片性好、是研究区主要开发调整方向。长7-2小层油层面积小、连续性较差,有一定的改造潜力。The newly discovered Chang 7 reservoir in yougou oil area in recent years has poor development effect due to unclear understanding of its distribution law.In order to further study the law of oil and gas enrichment,the relationship between sedimentary facies,source rock and structure is analyzed.Combined with the characteristics of reservoir profile and plane distribution,it is considered that the main source rock of Chang 7 oil layer in the study area is Zhangjiatan bank shale,and the oil and gas are enriched to high parts after simple primary migration.Chang 7 has the characteristics of episodic hydrocarbon expulsion,fracture dredging,multi-point filling and large-scale reservoir formation.In terms of hydrocarbon generation,it is located in the east of the hydrocarbon generation center,dominated by vertical migration and supplemented by lateral migration.The lower combined oil layer of Yanchang formation is located in the slope of Northern Shaanxi,and the effect of structural movement on reservoir transformation is weak.The Chang 7-1 sublayer has a wide distribution area and good connectivity.It is the main development adjustment direction of the study area.Small layer Chang7-2 has small area and poor continuity,and has certain transformation potential.

关 键 词：油沟油区 烃源岩厚度 分布规律 开发潜力 

分 类 号：TE[石油与天然气工程]