VES自转向酸存在的问题及解决对策  

The problems and corresponding strategies of VES self-diverting acid

作　　者：胡景涛[1] 刘平礼[1] 胡刚[1] 牟媚 

机构地区：[1]"油气藏地质及开发工程"国家重点实验室.西南石油大学,四川成都610500

出　　处：《石油化工应用》2015年第3期6-10,共5页Petrochemical Industry Application

基　　金：国家重大科技专项;项目编号:2011ZX05044

摘　　要：近年来,VES自转向酸以其"变粘、缓速、降滤、低伤害"等特点,被广泛应用于长井段、多层分支井的分流酸化和酸压中,并且取得了良好的效果。随着研究的深入和现场应用的增多,该体系存在的一些问题也凸显出来。主要体现在耐温性差、破胶不彻底、地层伤害、对Fe3+敏感等。这些问题的存在会严重影响VES自转向酸的应用范围和应用效果。总结了国内外对VES自转向酸体系的研究与应用情况,详细分析了VES在应用过程中存在的问题及其影响规律,并指出了解决这些问题的方向与方法。In recent years, VES has been successfully used in the oilfield industry in matrix and acid fracturing treatment, especially in long interval and multilayers wells, because of their unique characteristics of ＂viscosifying,retarding reaction rate, reduce leakoff, no damage＂. With the deepening of the research and field application on the rise, some problems of the system are also highlighted. Mainly embodied in the thermal endurance, gel breaking is not thorough, formation damage, sensitive to Fe3＋, etc. The existence of these problems will seriously affect the application range and effect of VES self-diverting acid. In this paper, authors investigate the research and application of VES, analyze in detail on the problems existing in the application process and its effect rules, and point out the direction and methods to solve these problems.

关 键 词：酸化 VES自转向酸 地层伤害 破胶 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]