吴起油田W油区长7油层油气成藏因素分析  

Analysis of Oil and Gas Reservoir Factors in Chang 7 Reservoir of W Oil Zone in Wuqi Oilfield

作　　者：白万梅 BAI Wanmei(Wuqi Oil Production Plant,Yanchang Oilfield Co.,Ltd.,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》2024年第6期151-153,158,共4页Chemical Engineering Management

摘　　要：针对油气藏分布及主控因素认识不清等问题,文章在烃源岩、储层等方面进行油气地质条件分析的基础上,从油水层识别、油气藏类型及分布等方面开展了油气控制因素分析工作。研究表明:(1)吴起油田W油区长7油页岩厚度在15~25 m,TOC含量远大于2%、Ro为0.8%;长73、长72、长71东北部砂体较为发育,主河道砂体厚度分别为15~25 m、15~23 m、15~28 m。(2)吴起油田W油区长7主要发育鼻状构造、砂岩透镜体、致密砂岩遮挡等类型油藏,主要富集三角洲前缘水下分流河道,河道砂岩与分流间湾泥岩的合理有效配置是成藏的关键。In view of the unclear understanding of oil and gas reservior distribution and controlling factors,this paper analyzes the oil and gas reservior control factors from the aspects of oil-water layer identification,oil and gas reservior type and distribution based on the analysis of oil and gas geological conditions in the aspects of source rock and reservoir.The results show that:(1)The thickness of Chang 7 oil shale in W oil zone of Wuqi Oilfield is 15-25 m,TOC content is much higher than 2%,Ro is 0.8%;the sand bodies in the northeast of Chang 73,Chang 72 and Chang 71 are relatively developed,and the thickness of sand bodies in the main channel is 15-25 m,15-23 m and 15-28 m,respectively.(2)In the W oil zone of Wuqi Oilfield,Chang 7 mainly develops nose-like structure,sandstone lens and tight sandstone screened reservoirs,mainly enrich delta front underwater distributary channel.Reasonable and effective allocation of channel sandstone and interdistributary bay mudstone is the key to reservoir formation.

关 键 词：油气成藏条件 成藏控制因素 长7油层 油水层识别 油藏类型 

分 类 号：TE34[石油与天然气工程—油气田开发工程]