二次开发油藏中井眼导向和防碰方案分析  

Analysis of Method for Reservoir Steering and Well Anticollision in a Redevelopment Reservoir

作　　者：高永明 何理鹏 Gao Yongming;He Lipeng(Shenzhen Branch of CNOOC China Ltd.,Shenzhen 518067)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518067

出　　处：《石化技术》2024年第3期223-225,共3页Petrochemical Industry Technology

摘　　要：底水油藏在二次开发过程中遇到的主要难点包括储层物性的非均质性、构造倾角和当前流体分布特征的不确定性,而且两期开发井眼之间可能存在较高的防碰风险。该项目成功实施的关键在于定量刻画厚储层的细节特征。为此,提出了基于GeoSphere超深随钻油藏描绘技术的综合优化方案,并进行了现场应用。在南海东部的实例分析表明:(1)沿着水平井轨迹,GeoSphere可同时识别垂向上多达4个有效边界和5套地层的特征,而且确认当前实际的油水界面仍为倾斜状态,有效的剩余油柱高于12m;(2)基于该综合方案的定量地质导向结果,不仅保证了二次开发过程中的工程安全,而且使得实际产能比设计高约30%。综合分析认为,基于GeoSphere超深随钻油藏描绘技术的综合优化方案可为单井的随钻追层和井眼防碰提供关键的技术支持和保障。In a sandstone bottom-water resevoir,the main challenges to affect its redevelopment efficiency are identified reservoir heterogeneity,structural dip uncertainty,fluid distribution uncertainty and the possible anticollision risks from the horizontal boreholes in two development phases.The key for a successful redevelopment campaign is the quantitative characterization of a thick reservoir.Here,an integrated optimization method is proposed based on GeoSphere ultradeep reservoir mapping service while drilling,and then carried out.In the real cases:(1)GeoSphere inversion profile revealed vertically up to four key boundaries and five layers around borehole,The dynamic OWC is identified as tilted and the remaining oil columns are higher than 12m;(2)Quantitative reservoir steering based on this integrated method guaranteed an engineering safety and an actual well performance about 30%higher than the prediction.Finally,it is clearly validated that this integrated optimization method not only could effectively avoid the redevelopment risks,but also could achieve a quantitative reservoir steering in a deeply developed reservoir.

关 键 词：底水油藏 二次开发 地质导向 井眼防碰 GeoSphere超深随钻油藏描绘技术 电阻率反演 油水界面 

分 类 号：TE34[石油与天然气工程—油气田开发工程]