油田注水目标函数大闭环优化控制系统的构建

Establishment of Large- Scale Closed Loop Optimization and Control System of Oilfield Water Injection Objective Function

在中国石化2015年油田注水大调查中,分析了大量注水测试数据,发现了目前油田注水系统存在的主要问题,提出前置宽频高效增压泵的PCP技术,研究PCP系统特性并建立其数学模型,实现管网数值模拟,并在此基础上构建注水目标函数大闭环优化控制系统。该系统通过注水系统动态优化软件实时采集注水系统状态,通过分析计算,建立优化控制目标函数,向PCP泵站系统发出控制调节信号,实现压力和流量调节,并通过大系统反馈不断修正,最终使注水系统达到优化运行。应用该系统可显著提升泵效,降低注水单耗,实时掌握管网运行情况,正确地判别整个管网系统配置是否合理,评价改造方案及效果。

To achieve the goal of Sinopec oilfield water injection survey in 2015,significant numbers of Sinopec test data were analyzed.Major problems on current oilfield water injection system are being recognized and PCP technology on broadband high efficient preceding booster pump is being introduced. Furthermore, after analyzing the characteristics of PCP system, establishing its mathematical model and implementing pipe- line network numerical simulation,large-scale closed loop optimization and control system of oilfield water injection objective function is being constructed. This system use real- time acquisition through the water injection system dynamic optimization software system to acquire the state of water injection system, through the analysis and calculation, to establish optimal control objective function,send control signal to the PCP pump station system to realize the pressure and flow control, and correction unceasingly through the large system feedback, finally achieve the optimal operation of water injection system. This system largely increases pump efficiency as well as lowers water injection consumption rate. In addition,this system oversees the running condition of pipe-line network on real time base and therefore makes judgments on the reasonableness of pipe- line network system deployment as well as predicts modification scheme and its effect.