粘弹性聚合物溶液孔喉模型流变动力分析  

The Pressure Drop Analysis of Viscous-Elastic Polymer Solution Flows in the Throat

作　　者：曹仁义[1] 程林松[1] 郝炳英[1] 许家峰[1] 姚大伟[1] 

机构地区：[1]中国石油大学(北京)石油天然气工程学院,北京102249

出　　处：《高分子材料科学与工程》2008年第3期15-18,共4页Polymer Materials Science & Engineering

基　　金：国家973计划项目(2005CB22130004)

摘　　要：针对多孔介质中聚合物溶液的粘弹特性难描述的问题,通过对其在多孔介质中流动特征的分析,提出将粘弹性流体在孔喉模型中流动过程分为入口收敛阶段、通过孔喉阶段和挤出孔喉阶段,并将各个阶段压降分解为粘性耗散压降和弹性拉伸压降。通过张量分析的方法,综合考虑了聚合物溶液的假塑性、弹性和弹性回复特性以及多孔介质的孔喉比和孔隙因子(喉道长度与喉道直径之比)等因素,推导了各个阶段的粘性耗散压降和弹性拉伸压降的表达式,建立了粘弹性聚合物溶液通过孔喉模型的压降数学模型。实例计算结果表明,建立粘弹性本构模型时,必须考虑通过孔喉阶段和挤出孔喉阶段以及弹性流体的弹性回复;弹性特性是造成压降损失的影响因素,在聚驱过程中不可忽略。Based on analysis of viscous-elastic polymer solution flowing in the throat, the flowing process is divided into three stages, entrance constriction, passing pore-passage and extrusion. The pressure drop in every stage is separated into viscous drop and elastic drop in every stage. With tensor analysis mathematics expressions of pressure drop are separately established considering pseudo plasticity, elastic properties, elastic recovery characteristic, pore throat ratio and porosity factor, and the pressure drop mathematical model of viscous-elastic polymer solution flowing in the throat is established. The example results show： it＇s requisite to considering passing pore-passage, extrusion stages and elastic rebound; elastic characteristic is important pressure drop factor.

关 键 词：聚合物溶液 流变性 粘弹性 孔喉模型 压降损失 数学模型 

分 类 号：TE320.663[石油与天然气工程—油气田开发工程]