聚合物驱杆式泵排量系数计算与分析

根据室内试验，结合杆式泵抽油特点，确定了油田应用的聚合物溶液的流变性，并建立了吸入过程中泵内压力、进液速度、进液高度和泵排量系数方程组。室内试验测试表明吸入过程中泵内压力随柱塞位移的变化基本上呈下凹非对称的抛物线形式；在有气体存在的情况下，泵内压力下降速度加快。现场实例表明，泵的排量系数受生产气油比、聚合物浓度、沉没度、冲程、冲次、泵径等多种因素影响，主要作用的因素是生产气油比、聚合物浓度和沉没度。油田实例分析与现场实践是一致的，进一步证明该理论是正确和可靠的。

THE CALCULATION AND ANALYSIS OF DISCHARGE COEFFICIENT FOR SUCKER ROD PUMP NUDER POLYMER FLOODING

Based on the characteristics of rod pump pumping and the indoor experiments, this paper has determined rheology of polymer solution applied in oil field, and have set up the equations of pump pressure, intake flow velocity, intake flow height, and discharge coefficient during suction process. Indoor experimental survey shows that during suction process the plot of pumping pressure vs. plunger displacement is basically concave-down and non-symmetrical parabolic type. In the case gas is present, velocity of pressure drop in pump increases. Practical examples on the spot has shown that pump’s discharge coefficient is affected by the producing GORs, polymer concentration, submergence depth, stroke, stroke rate, pump diameter etc., of the factors what have major effect is producing GORs, polymer concentration and submergence depth. Practical analysis in oil field is agreed with practice on the spot, which further verifies that this theory is right and reliable.