石油学报 ›› 1998, Vol. 19 ›› Issue (4): 73-76.DOI: 10.7623/syxb199804013

• 油田开发 • 上一篇    下一篇

聚合物驱油粘性流体渗流的分形研究

田根林1, 孙立群2, 孙永达2, 鞠岩1, 孙广煜1   

  1. 1. 渗流流体力学研究所;
    2. 天津大学
  • 收稿日期:1998-02-20 出版日期:1998-10-25 发布日期:2013-07-08
  • 作者简介:田根林,1983年毕业于兰州大学,1996年毕业于渗流流体力学研究所,获博士学位.现任渗流流休力学研究所化学室主任,高级工程师,通讯处:河北省廊坊市44号信箱.邮政编码:065007

gas reservoir multiwellbore horizontal well productivity well replacement ratio calculation method

Tian Genlin1   

  1. Institute of Porous Flow & Fluid Mechanics
  • Received:1998-02-20 Online:1998-10-25 Published:2013-07-08

摘要: 针对聚合物驱油两相渗流过程中的指进现象,建立了平面可视的渗流实验装置与实验方法和图像及数据处理方法.以驱替的波及面积为主要参数,建立了分维计算方法,并通过不同粘度的驱替液的驱油实验,确证油水两相的驱替渗流过程是分维的,同时得出了分维数是和聚合物驱替液粘度间的函数关系.由五点法井网注采模型上进行的实验现象表明,随着聚合物溶液浓度增加其粘度也增加,驱油时其前缘的推进也愈均匀.定量计算结果表明,随着聚合物溶液粘度增加,分维数也增大.如用不含聚合物的清水驱替时,分维数是1.563,当用1500mg/L的聚合物溶液驱替时,分维数是1.791;当聚合物浓度为4000mg/L时,分维数增加到1.956,且很接近于完全波及时的极限值2.0.这表明:用聚合物溶液驱油,驱替波及过的地方“破碎”程度减小,波及效果增加.这一实验和理论计算结果表明,用聚合物溶液驱油时,在扩大波及系数的同时,还可提高波及效果.从微观上讲,聚合物驱还可以降低残余油饱和度,提高洗油系数,其量和聚合物溶液粘度有关.

关键词: 聚合物, 粘性流体, 渗流, 指进, 分形

Abstract: In this paper,the fractal flow of viscous fluid of polymer flooding in porous media has been studied by using a two dimensional model.The fractal dimension has been calculated by employing the relation of sweep efficiency and front displacing radius.The displacement process has been recorded and treated by computer tomography to obtain the parameter.The result shows that two phases such as water and oil flow in porous media is fractal.The dimension is related to the viscosity of water phase when the oil is kept the same.The result also shows that the higher the viscosity of polymer solution,the higher the fractal and the better the sweep effect.In a two dimensinal model,the dimension is greater than 1 56 and less than 2 Fractal study indicates that polymer flooding can modify the sweep effect.This study provides not only the experiment evidence that polymer can improve displacement efficiency but also the theoretical explaination.

Key words: polymer viscous fluid porous flow fractal