粘弹性清洁压裂液的研究与应用  

STUDY AND APPLICATION OF VISCOELASTIC SURFACTANT-BASED FRACTURING FLUID

作　　者：卢拥军[1] 房鼎业[1] 杨振周[2] 宫长利[3] 王海楼[3] 强会彬[3] 

机构地区：[1]华东理工大学化工学院 [2]中国石油勘探开发研究院廊坊分院 [3]吉林石油集团公司井下工程公司

出　　处：《石油与天然气化工》2004年第2期113-114,142,共3页Chemical engineering of oil & gas

基　　金：国家 973项目 ;编号为 2 0 0 1CB2 0 91 0 7;国家自然科学基金资助项目 (2 0 2 760 1 6)

摘　　要：针对吉林油田油藏特点 ,优化出了VES - 70粘弹性清洁压裂液配方体系。分析了粘弹性清洁压裂液的水溶液增粘特性、耐温耐剪切性能、破胶性能、动态滤失与损害性能 ,介绍了现场应用工艺和应用效果。研究结果表明 ,该清洁压裂液应用简便 ,直接将粘弹性表面活性剂加入清水中 ,即可形成粘弹性凝胶 ,具有明显的网络结构 ,粘弹性好、剪切稳定性强、支撑悬浮力好、施工摩阻低 ,可控制裂缝的有效延伸 ,增产效果显著。The viscoelastic surfactant-based polymer-free fracturing fluid(VES)is a new fracturing fluid. Its properties of heat and shear resistant, breaking down,clean-up, fluid leakoff, core-damage were studied, and its applications in 3 wells were briefly presented. The results showed that this fluid containing quaternary ammonium salt has viscoelasticity. The gelation time is 0.5～1.0 min at pH=7.0 and temperature 20～30℃,the apparent viscosity of 4% VES-70 solution under 170s -1 shear rate is 175MPa·s. The gelled fluid completely breaks down in 30min at 40～70℃ mixing with crude oil. The damage of core is very low, the retained permeability is 96.16%. Application of this fracturing fluid is suitable to VES concentration 2%～4%, pH 7～8 and temperature below 80℃. In Jilin Oilfield, 3 wells were fractured by using this fluid and with success of increased oil productivity.

关 键 词：压裂液 VES-70 表面活性剂 油气藏 储层 孔隙度 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]