摘要
HPAM溶液在多孔介质中流动时 ,如果流速达到某一临界值 ,由于分子结构的特性 ,将会表现出弹性 ,使有效粘度增加。但是从注入井到生产井的流动过程中 ,流速是不断变化的 ,其弹性作用的有效距离及对驱油的贡献有多大 ,一直没有统一的认识。该文研究了注入速度对常规HPAM溶液弹性的影响 ,对比研究了没有弹性的黄原胶分子、甘油与常规HPAM的驱油效率 ,最终确定了HPAM在地下驱油过程中弹性作用的有效距离。
When hydrolyzed polyacrylamide (HPAM) solution flows in porous medium, it will exhibit elasticity and enhanced valid viscosity if velocity reaches a critical value. But we do not have the same opinion about its valid distances of elasticity and how much contribution to oil displacement efficiency when it is flowing from injection well to producing well under changeable velocity. In this paper, the effect of injecting velocity on the elasticity of conventional HPAM has been studied. The oil displacement efficiency of HPAM is compared with non-elastic Xanthan gum and glycerin, and the maximum distance of elasticity of the polymer solution flowing in the reservoir has been decided.
出处
《西南石油学院学报》
CSCD
2002年第6期64-67,共4页
Journal of Southwest Petroleum Institute
关键词
HPAM溶液
驱油过程
弹性
临界流速
驱油效率
hydrolyzed polyacrylamide
elasticity
critical velocity
oil displacement efficiency
