低渗透油藏阳离子表面活性剂缩膨技术研究

发布时间：2018-05-01 05:18

  本文选题：双阳离子表面活性剂 + 吸附　； 参考：《精细石油化工》2017年06期

【摘要】：针对长庆油田低渗透油藏注水困难的问题,采用可见光分光光度计、微电泳仪和原子力显微镜研究了一种水溶性双阳离子表面活性剂在岩石颗粒表面的吸附特性和对岩石颗粒表面电性及粘附能的影响规律,选用长庆油田长6地层的岩心,评价了处理剂的静态和动态缩膨效果。结果表明,表面活性剂在岩心颗粒表面的吸附等温线遵循Langmuir吸附规律,与岩心颗粒之间的静电引力较大。吸附后,削弱了岩石表面电势,降低了岩石表面粘附能,静态和动态条件下对黏土颗粒均具有较好的缩膨效果,因而能够降低注入水对岩心渗透性的伤害程度,明显提高低渗透油藏注水效率。
[Abstract]:Aiming at the difficulty of water injection in low permeability reservoirs in Changqing Oilfield, a visible light spectrophotometer is used. The adsorption characteristics of a water-soluble bianion surfactant on the surface of rock particles and its influence on the surface electrical properties and adhesion energy of rock particles were studied by microelectrophoresis and atomic force microscopy. The core of Chang-6 formation in Changqing Oilfield was selected. The static and dynamic shrinkage effect of the treatment agent was evaluated. The results show that the adsorption isotherms of surfactants on the surface of core particles follow the law of Langmuir adsorption, and the electrostatic force between surfactant and core particles is strong. After adsorption, the potential of rock surface is weakened, and the adhesion energy of rock surface is reduced. Both static and dynamic conditions have good shrinkage and swelling effect on clay particles, so the damage degree of injected water to core permeability can be reduced. The water injection efficiency of low permeability reservoir is improved obviously.
【作者单位】： 陕西科技大学化学化工学院;中国石油集团渤海钻探工程有限公司;
【基金】：国家科技重大专项项目(2011ZX05013-005)
【分类号】：TE39;TQ423
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本文编号：1827905