疏水缔合聚合物/Cr^(3+)冻胶在多孔介质中动态成胶研究  

Study on dynamic gelation of hydrophobic associating polymer/Cr^(3+) gel in porous media

作　　者：王业飞[1,2] 徐怀民[1] 于海洋[2] 张健 李先杰 王所良[2] 

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油大学(华东)石油工程学院,山东青岛266555 [3]中海石油研究中心,北京100027

出　　处：《油气地质与采收率》2011年第6期59-62,66,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家重大科技专项"海上稠油化学驱油技术"(2011ZX05024-004);"泰山学者"建设工程资助(ts20070704)

摘　　要：通过流变仪测定了用于动态成胶研究的疏水缔合聚合物/Cr3+冻胶的成胶时间,并用物理模拟实验的方法分析了其在多孔介质中的动态成胶过程,对比研究了多孔介质中静态成胶和动态成胶后水驱的差别,考察了岩心渗透率和注入速度对多孔介质中动态成胶的影响。结果表明,疏水缔合聚合物/Cr3+冻胶在多孔介质中动态成胶时间为6h,大约是通过流变仪测定的成胶时间的3～4倍,且成胶过程分3个阶段,即压力上升阶段、压力波动上升阶段和压力稳定阶段。多孔介质中静态成胶后水驱存在突破压力峰值,且静态成胶后水驱稳定压力明显比动态成胶后水驱稳定压力高。在一定渗透率范围(4～8μm2)内,岩心渗透率的变化对疏水缔合聚合物/Cr3+冻胶的动态成胶没有影响;注入速度对动态成胶有着重要的影响,随着注入速度的增加,动态成胶过程中形成的疏水缔合聚合物/Cr3+冻胶体系粘度降低。The gelation time of the gel used for dynamic gelation in porous media is determined through rheometer.The procedure of the dynamic gelation in porous media and the difference between static gelation and dynamic gelation in porous media is studied herein,as well as the influence of permeability and injection speed on dynamic gelation.Results show that the gelation time (6 h) of chromium gel flowing in porous media is three or four times longer than that (1.5-2 h) measured by rheometer,and the process of dynamic gelation is divided into three steps;pressure rising period,pressure rising fluctuated period and pressure stable period.The pressure of water flooding after static gelation in porous media shows a breakthrough pressure peak value,and its stable pressure is higher than that in dynamic gelation in porous.The effect of permeability and injection speed on the dynamic gelation of AP-P4/chromium is analyzed as well,and the results show that,the changing permeability has no impact on dynamic gelation process in a certain range (4-8 (μm2).But,the injection speed has an important impact on it.With increment of injection speed,the viscosity of the dynamic gelation gel decreases.

关 键 词：疏水缔合聚合物/Cr3+冻胶 动态成胶 影响因素 渗透率 注入速度 

分 类 号：TE357.431[石油与天然气工程—油气田开发工程]