| As oilfield companies pay more and more attention to cost control,the electricity cost of the water injection system has become a key content of the oilfield cost calculation.The working status of the pumps in the station is directly related to the operation of the system.The main purpose of this study is to carry out specific simulation calculations and optimize energy saving for the water injection system in the Z oil field of Kazakhstan,put forward a pressure reduction operation plan for the water injection system that is in line with the actual production,reasonably reduce the consumption of the water pump in the station,improve the efficiency of the water injection system,Power consumption of water injection system.After a specific calculation and analysis of the water injection system in Z Oilfield,it was found that the core problem of the system is that the pressure difference of the pump tube of the water injection station is too large,there is a low-pressure underinjection area,and there are many injection wells in the area under the jurisdiction of the central injection station,and the injection volume is required Big.In the case where the central water injection station is already operating at full capacity,since the treatment capacity of the produced water treatment system in the station is fixed,the produced water quality of the produced water treatment system deteriorates,which affects the water injection index.Based on the current status of the Z oil field in Kazakhstan and the oil fields at home and abroad,the goal is to determine the distribution of energy consumption losses,and to analyze the energy consumption of pumps,water injection stations,and water injection pipe network in the Z oil field water injection system step by step.For the oilfield water injection system,a variety of software simulation calculations can be used.The oilfield water injection system is essentially a water supply pipe network system.The water injection station is set as the water source point,and the water distribution room is set as the water demand point,which can simulate the actual operation of the entire system.Calculation.The consistency of the water injection pipe network and the water supply pipe network was found,and the EPANET hydraulic calculation software commonly used in the water supply pipe network was used to simulate the water injection system of the K oilfield Z oilfield.The simulation results were in line with the actual production and verified the low-pressure under-injection block of the pipe network presence.Based on the calculation results and the actual situation,a decompression operation plan was proposed after the feasibility analysis.The study found that the pressure difference of the pump tube in the Z oil field is too large.It is suitable to use the decompression method to decompress the entire water injection system and adjust the center.The water injection station at the far end of the 70-79 water distribution room node to the No.1 water injection station for injection,to solve the problem of insufficient water injection of the injection well in this area.Dismantling the stage through the water injection pump,while using pump coating technology to improve pump efficiency and solve the problem of under-injection in the low-pressure underinjection area after new pipeline construction.Electricity consumption before and after step-down operation.The results show that the average pressure of the pump outlet of the central station is reduced from 7.8MPa to 5.4MPa,the average pressure of the pump outlet of the station1 is reduced from 7.6MPa to 6.4MPa,and the station 2 The average pressure of the pump outlet was reduced from 6.1MPa to 5.3MPa.The maximum pressure difference of the pump tubes at each station was also reduced to 0.35 MPa.The cost of electricity per day was reduced from USD 6122.71 to USD 4494.07,and the annual electricity saving cost was approximately USD 412.5 million.The energy saving effect was significant. |
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