海上稀井网条件下的曲流河储层构型研究及其应用——以渤海A油田为例

Research of Architecture of Offshore Meandering River Reservoir under Sparse Well Pattern Condition and Its Application: Taking Bohai A Oilfield as an Example

针对渤海A油田稀井网高效开发的现实条件,利用常规测井、地震等资料,综合小尺度的精细对比与划分、多属性融合及水平井分析等手段开展稀井网条件下的曲流河储层构型精细研究。研究结果表明:稀井网条件下精细的井震结合是河道小尺度沉积单元划分的关键,高分辨率地震资料下多属性融合是点坝、废弃河道识别与刻画的重要手段,水平井资料的应用是成果检验及侧积层刻画的补充手段。研究区同时发育高弯度和低弯度曲流河,侧积层以纯泥岩和砂质泥岩为主,自然伽马值大于75 API,电阻率小于6Ω·m。研究成果实现了稀井网条件下的曲流河储层构型刻画。

Bohai A oilfield is developed under sparse well pattern,the architecture of the meandering river reservoir under the sparse well pattern of the oilfield is studied byfine stratigraphic contrast and division,multiple attribute fusion and horizontal well data analysis based on conventional well logging and seismic data.The research result shows that,the fine well logging-seism combination under sparse well pattern is the key to the division of small scale channel deposition units,the multiple attribute fusion based on high resolution seismic data is the important means for the recognition and characterization of point dam and abandoned channel deposition,and the application of horizontal well data is a supplementary means for the verification of research results and the characterization of lateral accretion bodies.In the study area,both large curvature and small curvature meandering river are developed,lateral accretion bodies are mainly pure mudstone and sandy mudstone,their Gamma value generally is larger than 75 API,resistivity is lower than 6Ω.m.The characterization of meandering reservoir architecture under sparse well pattern condition is realized