含聚采出液对电潜泵性能的影响研究

随海上油田提高采收率技术的推广,注聚规模的扩大和注聚时间的增加使生产井聚合物采出浓度增高,由此产生的含聚原油乳状液的性质变化对电潜泵工作性能的影响值得关注。针对此研究对象,通过室内实验,模拟渤海油田含聚原油乳状液,分析其流变性能：乳状液体系粘度随温度的上升而下降,随含水率的上升而上升,随聚合物浓度的增加而上升,原油乳状液综合转相点为70%。本文在实验数据和现场资料的基础上,建立了在一定生产条件下的粘度预测方程,同时利用软件分析含聚浓度变化对电潜泵特性的影响,发现相同含水条件下,随着浓度升高,电泵的系统效率和排量效率都呈下降趋势,表明采出液含聚浓度增大影响电潜泵的能耗。

The study on the affection of electric submersible pump performance with polymer flooding

With the development of offshore oil field EOR technology, the expansion of polymer injection increased polymer concentration of production wells. Consequently, the influence of electric submersible pump （ESP） performance by the changing of oil emulsion properties is concerned. Through the laboratory experiments, simulate the Bohai oilfield crude oil emulsion containing polymer, and analyze its theological properties, it shows that： the viscosity of emulsion is decreasing with the temperature rise, increasing with the water saturation and polymer concentration rise, the integrated phase conversion of crude oil emulsion containing polymer is 70%. In this paper, based on the lab data and field data, the viscosity prediction equation under certain production conditions was built up, the researcher utilized software to analyze the affection of the changing of polymer concentration to ESP performance and found that pump efficiency and emission efficiency of the system is decreasing with polymer concentration increase under the same water saturation. The presence of polymer solution increases the energy loss of ESP.