提高多源注水系统效率的策略研究与实践

Strategy Research and Practice of Improving the Efficiency of Multi-source Water Injection System

克拉玛依油田西北缘区块油藏层系多、非均质严重且相互层叠,各层系注水压力需求差异很大,注水系统采用统一压力注水时,系统各环节的能力与需求不能实时匹配,系统工况调节能力差、运行能耗高。通过研发具备模拟、诊断、预测功能的注水系统数值模拟软件,将多源复杂大型管网系统分解为若干个相对独立的子系统,确定了各节点影响注水系统效率的因素,采用泵控泵(PCP)技术和分压注水方式,使注水系统逐渐形成高(25 MPa)、中(16 MPa)、低(10 MPa)三套压力系统,结合生产实际,通过泵站改造和方案优选,实现了提高注水系统效率、满足地面配注和降低注水单耗的目的。

The northwestern reservoir of Karamay Oilfield is heterogeneous and overlapping each other, and different layers need different injection pressure. In the case of same injection pressure,the ability and the demand of the system can not be matched in real time,the regulating ability and the working condition is poor, and the energy consumption is high.The numerical simulation software of water injection system has the function of simulation,diagnosis and prediction,and it will be divided into a number of relatively independent subsystems.Through the research and analysis,the factors that affect the efficiency of water injection system are determined.By using PCP technology,the water injection system is gradually formed three sets of pressure system as high（25 MPa）, middle（16 MPa） and low（10MPa）. The efficiency of water injection system is improved and the water consumption of single well is reduced practically.