阳离子表面活性剂提高低渗透油藏注水效率机理  

Mechanism of Improving Injection Water Efficiency in the Low Permeable Reservoir

作　　者：谭俊领 沈一丁[1] 夏冰 陈燕 刘述忍 雷鹏 TAN Jun-ling;SHEN Yi-ding;XIA Bing;CHEN Yan;LIU Shu-ren;LEI Peng(College of Chemistry & Chemical Engineering, Shanxi University of Science & Technology, Xi'an 710021, P.R.China;Bohai Drilling and Exploration Engineering Corporation, CNPC, Tianjin 300457, P.R. China)

机构地区：[1]陕西科技大学化学化工学院,西安710021 [2]中国石油集团渤海钻探工程有限公司,天津300457

出　　处：《科学技术与工程》2017年第36期166-170,共5页Science Technology and Engineering

基　　金：国家科技重大专项(2011ZX05013-005)资助

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和微电泳仪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的影响规律,选用长庆油田长6地层的岩心,评价了该处理剂的抑制黏土膨胀效果及降压增注能力。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,使岩石表面电势减弱,减弱了黏土的膨胀,对黏土颗粒的运移具有一定的抑制作用,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。In view of the injection difficulty in the low permeability reservoir of Changqing oilfield,the visible spectrophotometer and micro electrophoresis apparatus were adopted to the adsorption of a type of water-soluble di-cationic surfactant on the rock surface and the effect on the electrical property of the rock surface.The depression effect of clay expansion and lowering the injection pressure and increasing the water injection rate were studied using the formation core of Changqing oilfield.The results show that the adsorption of the surfactant on the surface of the core particles follows the rules of the Langmuir adsorption and there is strong electrostatic attraction among the core particles.After adsorption,the rock surface potential decreased to inhibit the swelling and the migration of the clay particles.Therefore,it could reduce the damage of injection water to the core permeability and improve the water injection efficiency significantly.

关 键 词：双阳离子表面活性剂 吸附 电性 渗透率 降压增注 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]