东非裂谷盆地浅水三角洲储层星型丛式水平井网渗流规律及参数优化  

Seepage law and parameter optimization of star-shaped cluster horizontal well pattern in a shallow water delta reservoir in the East African Rift basin

作　　者：杨莉 刘广为 杨宝泉 刘钧 YANG Li;LIU Guangwei;YANG Baoquan;LIU Jun(CNOOC International Limited,Beijing 100028,China)

机构地区：[1]中国海洋石油国际有限公司,北京100028

出　　处：《中国海上油气》2023年第3期96-102,共7页China Offshore Oil and Gas

摘　　要：东非裂谷盆地Albert湖区X油田为浅层层状砂岩油藏,主力储层为浅水三角洲沉积,综合考虑钻井难度及储层条件,开发方案采用了星型丛式水平井注采井网结构。根据势叠加理论,建立了典型星型井网的渗流模型,分析了星型井网的势分布特征;通过典型模型数值模拟,分析了星型井网水平井段沿程产出特征,并进一步对星型水平井网参数优化进行了分析。结果表明,适当减小注水井射孔段长度、生产井采用智能完井、井网中部加密1口直井,均可以改善星型井网开发效果。X油田所采用的星型丛式水平井注采井网结构设计思路,可以为其他相似油田提供参考。The X oilfield in the Albert Lake area of the East African Rift basin is a shallow layered sandstone reservoir,and the main reservoir is shallow water delta deposits.Considering the drilling difficulty and reservoir conditions,a star-shaped cluster horizontal injection-production well pattern was adopted in the field development plan.According to the potential superposition theory,a seepage model of a typical star-shaped well pattern is established,and the potential distribution characteristics of the star-shaped well pattern are analyzed.Through numerical simulation of the typical model,the production performance along the horizontal well section of the star-shaped well pattern is analyzed,and the parameter optimization of the star-shaped horizontal well pattern is further analyzed.Results show that the development performance of the star-shaped well pattern can be improved by appropriately reducing the perforation length of the water injection wells,adopting intelligent completion in the production wells,and infilling a vertical well in the middle of the well pattern.The design idea of the star-shaped cluster horizontal well pattern used in X oilfield can provide a reference for other similar oilfields.

关 键 词：星型井网 丛式水平井 浅水三角洲 渗流规律 参数优化 

分 类 号：TE343[石油与天然气工程—油气田开发工程]