摘要
本文获得了由长链氧化胺表面活性剂LAO与反离子盐复配形成的清洁胶束压裂液体系,并进一步研究了该体系流变性能、耐温性能及其相关影响因素。结果表明,LAO清洁压裂液最优组成为2%LAO+3%水杨酸钠(NaSal),该体系的耐温极限为120℃。该体系在110℃、170 s^(-1)下剪切1 h后,体系黏度可保持在30 m Pa·s以上。同时,该体系具有良好的携砂性能和明显的黏弹性、触变性和剪切变稀特性。破胶实验表明,在压裂液与原油体积比不大于40:1时,原油可使该体系顺利破胶,破胶液黏度小于3 m Pa·s。
A clean micelle fracturing fluids based on long chain amine oxide surfactant and counter-ion salts was obtained, and the rheological properties, thermal stability and related factors of the system were studied. The results showed that, the optimal formulation was 2% LAO + 3% Na Sal, and the temperature resistance limit value of the system was of 120℃. The viscosity of the optimal system was kept above 30 m Pa·s after sheared for 1 hour at the shear rate of 170 s^(-1) at the temperature of 110℃. The rheological results showed that the 2%LAO +3% Na Sal fracturing fluids was characteristic of significant viscoelastic, thixotropic and shear thinning properties, and possessed excellent proppant-suspension property. Gel breaking experiments proved that when the volume ratio of the fracturing fluidings to the crude oil was lower than 40:1, the fracturing fluids could be broken completely after mixed with the crude oil, and the viscosity of the broken fluids was less than 3 m Pa·s.
出处
《油田化学》
CAS
CSCD
北大核心
2015年第4期499-502,506,共5页
Oilfield Chemistry
基金
863计划"致密砂岩气藏低伤害压裂液体系研究与应用"(项目编号2013AA064801)
关键词
氧化胺
反离子盐
压裂液
流变性能
amine oxide
counter-ion salt
fracturing fluid
rheology property