多孔介质剪切下铬冻胶体系成胶行为研究  

Gelling behavior of HPAM/Cr(Ⅲ) under the shearing of porous media

作　　者：吕鹏[1] 王业飞[1] 于海洋[1] 史胜龙[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266555

出　　处：《西安石油大学学报（自然科学版）》2012年第1期75-80,121-122,共6页Journal of Xi’an Shiyou University（Natural Science Edition）

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

摘　　要：采用安瓿瓶和填砂管考察了铬冻胶体系的静态成胶和动态成胶过程.结果表明:同一配方下铬冻胶在多孔介质中动态成胶的初始成胶时间是其在多孔介质中静态成胶的初始成胶时间的1～3倍,最终成胶时间是其在多孔介质中静态成胶时间的1～3.5倍.铬冻胶在多孔介质中静态成胶的初始成胶时间是其在安瓿瓶内静态成胶的初始成胶时间的1～2倍,最终成胶时间是其在安瓿瓶内静态成胶时间的3～5倍.随着剪切速率的增大,铬冻胶体系受到的剪切作用增强,其初始成胶时间和最终成胶时间均延长,成胶后的封堵能力降低.随着聚合物浓度和交联剂浓度的增大,铬冻胶的初始成胶时间和最终成胶时间均延长,成胶后的强度增大.聚合物分子的吸附和捕集作用不是引起压力增大的主要原因,引起压力变化的主要因素是铬冻胶在多孔介质中的成胶.The gelling behavior of HPAM/Cr(Ⅲ) under static and dynamic conditions is researched using ampoule bottles and sand packs,and the results show that,its initial gelation time and final gelation time under the dynamic conditions in porous media are 1~3 times and 1~3.5 times separately as long as those under the static conditions in porous media.Its initial gelation time and final gelation time under the static conditions in porous media are 1~2 times and 3~5 times separately as long as those under the static conditions in ampoule bottles.The initial gelation time and the final gelation time of HPAM/Cr(Ⅲ) are delayed and the plugging capacity after gelling declines with the increase of shearing velocity and the increase of the shearing effect.They are also delayed and the strength after gelling is increased with the increasing of polymer and crosslinker concentration.The main cause leading to the increase of water injection pressure is the gelling of HPAM/Cr(Ⅲ) in porous media but not the adsorption and trapping effects of polymer molecule.

关 键 词：铬冻胶 多孔介质 动态成胶 剪切 吸附 

分 类 号：TE357[石油与天然气工程—油气田开发工程]