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以油井供产协调方程为基础,建立了抽油机井动液面、产液量与抽汲参数之间关系的仿真模型,改进了以抽油杆柱动态仿真为基础的抽油机井系统效率仿真模型,并建立了基于抽汲参数优化设计的系统效率极限值仿真模型。分析了油藏参数、油井参数、设备类型与抽汲参数对系统效率的影响。仿真结果表明:系统效率随油井产能的增加而增加;含水率与气油比对系统效率有显著影响,气油比越大、含水率越低,系统效率越低;抽汲参数组合对系统效率有显著影响。对于低气油比、高含水、高产液量的油井,在优化设计抽汲参数条件下,抽油机井系统效率极限值可以达到50%,甚至超过60%。目前现场实际测试中所出现的50%以上的高系统效率是有科学依据的。
Based on the well coordination equation of oil well, a simulation model of the relationship between dynamic liquid level, liquid production and pumping parameters of pumping well was established, and the system efficiency simulation of pumping well was improved based on the dynamic simulation of rod string Model, and establishes a system efficiency limit simulation model based on pumping parameters optimization design. The effects of reservoir parameters, well parameters, equipment types and pumping parameters on system efficiency are analyzed. The simulation results show that the system efficiency increases with the increase of oil well productivity. The water-gas ratio and gas-oil ratio have a significant effect on the system efficiency. The larger the gas-oil ratio and the lower the water content, the lower the system efficiency. Have a significant impact. For oil-gas wells with low gas-oil ratio, high water cut and high oil production, the system efficiency limit of pumping well can reach 50% or even over 60% under optimized pumping parameters. At present, more than 50% of the high system efficiencies that appear in actual field tests are scientifically based.