基于动态数学模型与GA算法的三相分离器油水处理控制研究

Research on oil-water treatment control of three-phase separator based on dynamic mathematical model and GA algorithm

随着当下油田采出液含水量的日益增加,为了提高卧式三相分离器的脱水效率,也针对入口流量和出口流量的增加会对分离器控制系统造成干扰的问题,此次研究通过分析分离器脱水效率与油水界面高度的关系建立数学模型,且引入遗传算法得到最优油水界面高度。且此次研究基于三相分离器油水界面控制工艺对分离器做出改进构建动态数学模型,降低控制系统所受干扰。实验结果表明,油水界面高度为2.062 m时,分离器脱水效率最高,为95.47%,优化后分离器的平均脱水效率比优化前分离器效率提升7.08%。此次研究所建立的液位控制模型与实际运行中分离器控制系统的输出响应相符合。此次研究成果在卧式三相分离器控制系统研究领域有一定价值,可以作为技术参考。

With the increasing water content of produced liquid in current oilfield,in order to improve the dewatering efficiency of horizontal three-phase separators,and to address the problem that the increase of inlet flow rate and outlet flow rate will cause interference to the separator control system,this study established a mathematical model for the relationship between the dewatering efficiency of separators and the height of oil-water interface,and introduced genetic algorithm to obtain the optimal height of oil-water interface.In this study,based on the oil-water interface control process of the three-phase separator,the separator is improved to build a dynamic mathematical model to reduce the interference of the control system.The experimental results show that when the oil-water interface height is 2.062 m,the dehydration efficiency of the separator is the highest,which is 95.47%.The average dehydration efficiency of the separator after optimization is 7.08%higher than that before optimization.When the inlet and outlet flow of the separator increases,the internal pressure of the separator changes within 500 to 1000 Pa,which is within the normal range that the separator can bear.The liquid level control model established in this research is consistent with the output response of the separator control system in actual operation.The research results have certain value in the research field of horizontal three-phase separator control system,and can be used as a technical reference.