多层砂岩油藏精细注水开发实践

南堡油田为典型的复杂断块注水开发多层砂岩油藏,注水开发中暴露出平面、层间、层内矛盾突出的问题。以单砂体为单元完善注采井网及注采关系,应用大斜度多级细分注水技术缓解层间矛盾,应用分段调剖技术方法进行水淹层治理,实施酸化增注、压裂增注等综合性增注措施,实施精细注采调控,加强精细注水管理,油藏自然递减大幅下降,含水上升率得到有效控制,采收率提高。本文总结分析了南堡油田精细注水主要做法,对同类型的多层砂岩油藏精细注水开发有一定的指导与借鉴意义。

Development Practice of Fine Water Injection in Multilayer Sandstone Reservoir

Nanpu Oilfield is a typical multi-layer sandstone reservoir developed by water injection in complex fault blocks. .the prominent problems of plane, interlayer and intralayer contradictions are exposed in water injection development. Perfecting injection-production well pattern and injection-production relationship with single sand body as unit, Using the technology of high slope multi-stage subdivision water injection is applied to alleviate the contradiction between layers, and the technology of sectional profile control is applied to control the flooded layer. Comprehensive stimulation measures such as acidizing stimulation and fracturing stimulation are implemented, Implement fine injection and production control and strengthen fine water injection management, The natural decline of reservoir is greatly reduced, the water cut rise rate is effectively controlled and the recovery rate is improved. This paper summarizes and analyses the main methods of fine water injection in Nanpu Oilfield, which has certain guidance and reference significance for the fine water injection development of the same type of multi-layer sandstone reservoirs.