【摘要】 在三相分离器前进行预分水是确保老油田采出液含水体积分数持续增加现状下，油气集输系统稳定的最经济措施。围绕快速、多分水的目标，采用室内试验和数值模拟相结合的方法，分析入口含水体积分数对预分水用管式离心机分离性能的影响规律，确定其极限水出口分流比；探讨管式离心机在极限水出口分流比工况下，分离性能崩溃点随操作参数变化的分布规律，进而确定该工况下转速和流量的最佳匹配关系。研究结果表明：随入口含水体积分数的增加，管式离心机水出口含油质量浓度缓慢降低，分水率逐渐增加；当入口含水体积分数为80%时，极限水出口分流比为70%(此时分水率为88%);影响水出口分流比增加的关键原因为油水界面随水出口分流比的增加而不断向水出口方向移动，进而导致水出口含油质量浓度持续上升；基于熵权-Topsis算法计算设计处理量下的经济转速为600 r/min。研究结果可为采出液预分水用管式离心机的优化和性能改进提供指导。更多还原

【Abstract】 The water cut of produced fluid in mature fields continues to increase.In this situation, the preliminary diversion before three-phase separator is the most economical measure to ensure the stability of the oil and gas gathering and transportation systems.In this paper, for purpose of fast and more water diversion, laboratory experiment and numerical simulation were combined to analyze how the volume fraction of water at inlet affects the separation performance of preliminary diversion tubular centrifuge, and determine its ultimate water outlet diversion ratio.Then, the variation of the separation performance collapse point of tubular centrifuge with the operating parameters under the condition of ultimate water outlet diversion ratio was investigated, and the optimal matching relationship between rotation speed and flow rate under this condition was finally determined.The research results show that as the volume fraction of water at inlet increases, the oil mass concentration at water outlet of tubular centrifuge slowly decreases, and the diversion ratio gradually increases.When the volume fraction of water at inlet is 80%,the ultimate water outlet diversion ratio is 70%(at this time, the diversion ratio is 88%).The key reason for the increase in water outlet diversion ratio is that the oil/water contact continuously moves towards the water outlet with the increase of water outlet diversion ratio, thereby leading to a continuous increase in oil mass concentration at water outlet.Based on the entropy weight-Topsis algorithm, the economic rotation speed under the designed treatment capacity is calculated to be 600 r/min.The research results provide guidance for the optimization and performance improvement of tubular centrifuges used for preliminary diversion of produced fluid.更多还原