基于储层构型的辫状河剩余油分布规律——以渤海湾盆地L油田馆陶组为例  

Remaining oil distribution in braided river based on reservoir architecture:A case study from Guantao Formation of L Oilfield in Bohai Bay Basin

作　　者：李俊飞 尚宝兵 徐静 王鹏飞 叶小明 LI Junfei;SHANG Baobing;XU Jing;WANG Pengfei;YE Xiaoming(Tianjin Branch of CNOOC Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《复杂油气藏》2022年第2期61-66,共6页Complex Hydrocarbon Reservoirs

摘　　要：渤海湾盆地L油田馆陶组油藏为辫状河储层,储层非均质性较强,注水开发导致储层水淹状况复杂,剩余油分布规律难以预测。从辫状河储层构型解剖入手,综合应用野外露头、现代沉积、岩心、测井等资料,建立辫状河储层构型模式,以此为基础,利用动静态资料分析储层构型及其控制下的储层质量差异对油水运动的影响。研究表明:层间非均质性易产生层间干扰,注入水优先沿储层质量好的砂体运移,层间剩余油主要分布在与储层质量差的砂体相连通的砂体中;平面上,半泥质充填模式的剩余油主要富集在心滩坝边部或辫状河道;泥质充填河道周围存在水动力滞留区,剩余油富集于周围的心滩坝;层内夹层的存在使得夹层下部砂体水淹,剩余油富集在夹层上部。The Guantao Formation of L Oilfield in the Bohai Bay Basin is a braided river reservoir with strong reservoir heterogeneity.Water flooding development led to complex flooding patterns,resulting in the remaining oil distribution being unpredictable.Based on the anatomy of braided river reservoir architecture,the field outcrop,modern deposition,core,and logging data were comprehensively applied to establish the braided river reservoir architecture model.On this basis,dynamic and static data were used to analyze the influence of reservoir architecture and reservoir quality differences on oil and water movement.The results show that the interlayer heterogeneity is prone to interlayer interference,the injected water is preferentially transported along with the sand bodies with good reservoir quality,and the interlayer remaining oil is mainly distributed in the sand body connected to the sand body with poor reservoir quality.On the plane,the remaining oil in the semi-muddy filling mode is mainly concentrated on the edge of the braided bar or in the braided channel.There is a hydrodynamic retention area around the muddy-filled channel,and the remaining oil is enriched in the surrounding braided bar.The existence of the interlayer makes the lower sand body water-flooded,and the remaining oil is enriched in the upper part of the interlayer.

关 键 词：辫状河 储层构型 油水运动 剩余油 渤海湾盆地 

分 类 号：TE321[石油与天然气工程—油气田开发工程]