摘要
试井分析方法是获得聚合物前缘移动规律的有效手段,因此本文考虑了聚合物溶液弹性及两区界面附加阻力,建立了聚合物溶液质量浓度扩散及压力传播数学模型,并采用有限差分方法获得井底压力动态响应。研究结果表明,在聚驱初期,剪切作用起主导作用,聚合物溶液黏度随距离的增加而增大。超过一定距离后,其质量浓度扩散起主导作用,表现为黏度随着距离的增加而降低。幂律指数越低,其黏度越高。弹性越大,其黏度越高,进入聚合物区径向流时间越晚。两区界面附加阻力越大,压力导数越高。两区界面位置离注入井越近,聚合物区发生径向流时间越早。研究结果为聚合物驱试井解释提供重要的理论支持。
The well test analysis method is an effective method to obtain the movement rule of polymer front edge.Therefore,the elasticity of polymer solution and the Interface addition friction at the composite interface were considered,the mathematical models of polymer solution concentration diffusion and pressure propagation were established,and the finite difference method was used to obtain the dynamic response of bottom hole pressure.The results showed that in the early stage of polymer flooding,shear played a leading role.The viscosity of polymer solution increased with the increase of distance.After exceeding a certain distance,its concentration diffusion played a leading role,showing that the viscosity decreased with the increase of distance.The lower the power law index,the higher the viscosity,the greater the elasticity,the higher the viscosity,and the later the radial flow into the polymer region.The greater the addition friction at the interface,the higher the pressure derivative,and the closer the interface was to the injection well,the earlier the radial flow occurred in the polymer region.The results provide important theoretical support for the interpretation of polymer flooding well test method.
作者
郭世强
藏秋缘
高欣
彭晓娟
GUO Shi-qiang;ZANG Qiu-yuan;GAO Xin;PENG Xiao-juan(Key Laboratory for Enhanced Oil&Gas Recovery of the Ministry of Education,Northeast Petroleum University,Daqing 163318,China;The First Oil Production Plant of Daqing Oilfield Limited Company,Daqing 163311,China)
出处
《当代化工》
CAS
2020年第12期2683-2687,共5页
Contemporary Chemical Industry
基金
中国博士后科学基金(项目编号:2019M66125)
黑龙江省大学生创新训练计划项目(项目编号:201910220044)
关键词
界面附加阻力
黏弹性聚合物
压力动态曲线
质量浓度扩散
复合油藏
Interface addition friction
Viscoelastic polymer
Pressure transient curve
Concentration diffusion
Composite reservoir
作者简介
郭世强(1999-),男,研究方向:聚合物驱渗流及压力动态。E-mail:gsqsdj@foxmail.com;通信作者:藏秋缘(1995-),女,在读硕士,研究方向:油气渗流理论与应用。E-mail:zqy9820@163.com。
