Operational efficiency optimization of centrifugal water injection pump station
WANG Zenglin1, LIU Gang2*, LI Zengliang2, FAN Chunyong2, ZHANG Jitong2, DONG Xiangwei2, LIU Bin2
1. SINOPEC Shengli Oilfield Branch, Dongying, Shandong 257000, China; 2. School of Mechanical and Electrical Engineering, China University of Petroleum(East China), Qingdao, Shandong 266580, China
Abstract：In order to make the operation combination of centrifugal water injection pump station more reasonable and reduce its energy consumption, the operation of centrifugal water injection pump station was optimized by minimizing the objective function of consumed power in the paper. A solution procedure forthis optimization problem was obtained, and the optimized results include series-parallel connection modes of various pumps and rotative speed of each pump.According to the result content above, an operation optimization software of centrifugal water injection pump station was composed and applied to the water injection pump station in a specific oil field. The optimized mode will serve as an update operation mode of the station.In this mode, the pump consumed power is in the minimum. The results show that the series-parallel connection and speed regulation of centrifugal pumps can allow them as many as possible to run in the high efficiency zone under certain operating conditions.When the complete enumeration method is used to search the optimum operation combination at a duty point, the discrete optimization problem of pump combination can be transformed into a convenient non-linear programming problem.Fortunately, this nonlinear programming problem can be solved by fimicon function in Matlab. The results can provide a reference for operation optimization or technical transformation of the water injection pump station.
