多元接枝聚表剂性能评价及驱油机理研究
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摘要
本文主要从以下几个方面对一种新型聚合物—多元接枝聚表剂进行了较为系统的性能评价和驱油机理研究。
用环境扫描电镜观察了聚表剂的四种样品在溶液中的形态结构,观察得知,四种样品在清水中均有比较规则的空间网状结构。
通过流变性和粘弹性实验得出,聚表剂的粘度远高于同浓度的MO4000聚合物,并且具有良好的耐盐性、流变性及粘弹性。
乳化实验表明聚表剂具有良好的乳化能力,优于普通聚合物。
用动态接触角测量仪研究了聚表剂的润湿性的改变效果,结果表明聚表剂具有一定的润湿性改变能力。
通过静态吸附实验,测定了聚表剂的吸附量。
通过驱替实验测定聚表剂具有很高的阻力系数和残余阻力系数。
微观实验研究表明,不论是亲水模型还是弱亲油模型,聚表剂驱都能明显减少水驱残余油量。在亲水模型中,油的流动机理除了剪切夹带,还具有乳化性和改变润湿性;而在亲油模型内,油的流动以拉丝、桥接为主,同时也会发生乳化现象。
驱替实验证实水驱之后用聚表剂驱油的采收率提高达10%以上,并且含水率均有所下降,压力均有所上升,显示出聚表剂溶液具有一定的增油效果,有利于提高采收率。
In this paper,the new polymer-polymer surfactant is studied systematically on performance evaluation and Mechanism.
The microcosmic characteristic of four kinds of polymer surfactant solution is observed by scanning electronic microscopy.Based on the observation,it is shown that all the four kinds of samples form regular network structure in the rinsing.
Based on tests of rheological behavior,it is concluded that viscosity of polymer surfactant is higher than the MO4000 as the same concentration and its salt endurance、rheological behavior and viscoelasticity are also better than the MO4000.
The emulsification experiments shows:the emulsification capacity of polymer surfactant is better than common polymer.
Wettability changing effects are studied by dynamic contact angle measurement nstrument,showing good wettability changing ability of polymer surfactant.
Basded on static adsorption experiment,it gives the adsorption of polymer surfactant.
Basded on Displacement experiments,it is shown that the polymer surfactant has high coefficient of drag and residual resistance factor.
According to the results of microcosmic experiment,it is observed that the residual oil significantly reduced after polymer surfactant flooding in water-wet micromodel and oil-wet micromodel.In water-wet micromodel the oil flow mechanism is the entrainment by polymer surfactant solution、emulsification and Wettability changing effect;and in oil-wet micromodel the oil flow mechanism is
mainly the bridging of two oil films and oil thread with emulsification.
Displacement experiments confirmed that the oil recovery can be enhanced by about 10%,and the Water cut can be reduced,the pressure can be increased,showing excellent results of increasing oil and enhancing oil recovery.
用环境扫描电镜观察了聚表剂的四种样品在溶液中的形态结构,观察得知,四种样品在清水中均有比较规则的空间网状结构。
通过流变性和粘弹性实验得出,聚表剂的粘度远高于同浓度的MO4000聚合物,并且具有良好的耐盐性、流变性及粘弹性。
乳化实验表明聚表剂具有良好的乳化能力,优于普通聚合物。
用动态接触角测量仪研究了聚表剂的润湿性的改变效果,结果表明聚表剂具有一定的润湿性改变能力。
通过静态吸附实验,测定了聚表剂的吸附量。
通过驱替实验测定聚表剂具有很高的阻力系数和残余阻力系数。
微观实验研究表明,不论是亲水模型还是弱亲油模型,聚表剂驱都能明显减少水驱残余油量。在亲水模型中,油的流动机理除了剪切夹带,还具有乳化性和改变润湿性;而在亲油模型内,油的流动以拉丝、桥接为主,同时也会发生乳化现象。
驱替实验证实水驱之后用聚表剂驱油的采收率提高达10%以上,并且含水率均有所下降,压力均有所上升,显示出聚表剂溶液具有一定的增油效果,有利于提高采收率。
In this paper,the new polymer-polymer surfactant is studied systematically on performance evaluation and Mechanism.
The microcosmic characteristic of four kinds of polymer surfactant solution is observed by scanning electronic microscopy.Based on the observation,it is shown that all the four kinds of samples form regular network structure in the rinsing.
Based on tests of rheological behavior,it is concluded that viscosity of polymer surfactant is higher than the MO4000 as the same concentration and its salt endurance、rheological behavior and viscoelasticity are also better than the MO4000.
The emulsification experiments shows:the emulsification capacity of polymer surfactant is better than common polymer.
Wettability changing effects are studied by dynamic contact angle measurement nstrument,showing good wettability changing ability of polymer surfactant.
Basded on static adsorption experiment,it gives the adsorption of polymer surfactant.
Basded on Displacement experiments,it is shown that the polymer surfactant has high coefficient of drag and residual resistance factor.
According to the results of microcosmic experiment,it is observed that the residual oil significantly reduced after polymer surfactant flooding in water-wet micromodel and oil-wet micromodel.In water-wet micromodel the oil flow mechanism is the entrainment by polymer surfactant solution、emulsification and Wettability changing effect;and in oil-wet micromodel the oil flow mechanism is
mainly the bridging of two oil films and oil thread with emulsification.
Displacement experiments confirmed that the oil recovery can be enhanced by about 10%,and the Water cut can be reduced,the pressure can be increased,showing excellent results of increasing oil and enhancing oil recovery.
引文
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