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应用多相流理论计算了抽油泵的沉没压力和排出压力,改进了抽油杆柱轴向振动底部边界条件的仿真模型,完善了抽油机井有效功率、电动机输入功率与抽油系统效率的仿真模型。以抽油系统输入功率最低为优化设计的目标函数,优化了单井不同产量条件下的最佳抽汲参数及所对应的最低输入功率,建立了单井最低输入功率与产量之间的回归模型。以该模型为基础,将单井产量作为优化设计变量,考虑区块整体的原油计划产量约束,建立了以区块整体输入功率最低为目标的区块整体优化设计模型。综合单井与区块整体的优化设计结果,优选出整体区块内各个单井的最佳产量以及所对应的最佳抽汲参数。计算实例表明,与单井优化设计结果比较,利用区块整体优化方法可以进一步降低区块整体的总耗电量。实际算例表明,采用区块整体优化抽油系统的方法,输入功率可以减少16.7%。
The multi-phase flow theory was used to calculate the submerged pressure and the discharge pressure of the sucker rod pump, and the simulation model of the bottom boundary conditions of sucker rod column was improved. The simulation results of the effective power, the input power of the sucker rod and the pumping system efficiency model. Taking the lowest input power of pumping system as the objective function of optimization design, the optimal pumping parameters and the corresponding minimum input power under different production conditions of single well were optimized, and a regression model was established between minimum input power and output of single well . Based on this model, taking the single well production as the optimal design variable and the crude oil production yield constraint of the whole block as a whole, an overall optimization design model of the block with the lowest total input power of the block is established. Based on the optimized design results of the single well and the whole block, the optimal output of each single well in the whole block and the optimal pumping parameters are optimized. The calculation example shows that, compared with the single well optimization design results, the overall block power consumption can be further reduced by using the whole block optimization method. The actual example shows that the input power can be reduced by 16.7% by using the block optimization pumping system.