胜利坨11南交联聚合物驱采出液油水界面性质及乳状液稳定性研究

用界面张力仪、表面粘弹性仪和Zeta电位仪测定了胜利坨11南原油模拟油与采出水间的界面特性,研究了聚合物、交联剂及弱凝胶对这些界面特性及乳状液稳定性的影响。结果表明,模拟水中加入聚合物、弱凝胶后,模拟水与原油模拟油间的界面张力、界面剪切粘度和油滴表面的Zeta电位绝对值增加,原油与含聚合物和弱凝胶的模拟水间所形成的W/O和O/W乳状液稳定性随聚合物、弱凝胶浓度增加而增强;交联剂对原油模拟油与模拟水间的界面性质及所形成的乳状液稳定性影响很小。

Investigation on oil-water interfacial property and emulsion stability of crosslink-polymer flooding produced water in Shengli tuo11 south oilfield

Interfacial properties of Shengli Tuo11 south model oil and produced water were investigated with interfacial tensionmeter,interfacial viscoelastometer and Zeta potential instrument.Meanwhile,the effects of the polymer,crosslinker and weak gel concentrations on interfacial property and emulsion stability were also studied in this thesis.When a certain amount of polymer and weak gel was added into the stimulation water,the interfacial tension and the interfacial shear viscosity both increase for the stimulation water phase and model oil.Meanwhile,the absolute value of the Zeta potential of the surfaces of the oil droplets increases also.The stability of water-in-oil and oil-in-water emulsion,both formed by crude oil and stimulation water containing the polymer and weak gel,would enhance as the concentration of the polymer and wek gel increases.The influences of crosslinker on interfacial properties and the stability of emulsion of model oil and the stimulation water were very small.