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低张力体系改善低渗透油藏水驱渗流特征实验
石油与天然气地质
2007年 28卷 第No.4期
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Title
Experiment of low-tension system for improving percolation behaviors in waterflooding low-permeability reservoirs
Authors
Lai Nanjun
Ye Zhongbin
Chen Hong
Luo Pingya
摘要
低渗透油藏注水井吸水能力低,注水压力逐渐升高,注水开发效果差。以国内低渗透注水开发油田(T油田)为例,研制了改善低渗透油藏注水开发效果的低张力体系。室内实验结果表明,低张力体系能够有效地降低残余油饱和度,增加油水两相共渗区间,改善低渗透油藏水驱渗流特征,从而改善低渗透油藏的注水开发效果。
Abstract
Waterflooding performs poorly in low-permeability reservoirs due to their low absorbing capacity and gradually increasing injection pressure.This paper takes T oilfield,a low-permeability oilfield under waterflood development program,as an example to illustrate the development of a Low-Tension System for improving waterflooding effectiveness in low-permeability reservoirs.Lab experimental result shows that the system can effectively reduce residual oil saturation,increase oil/water two-phase common seepage intervals,improve percolation behaviors,and thus enhance waterflooding efficiency in low-permeability reservoirs.
关键词：
低张力体系;
注入压力;
相对渗透率;
渗流特征;
低渗透油藏;
Keywords:
low-tension system;
injection pressure;
relative permeability;
percolation behavior;
low-permeability reservoir;
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