变粘分流酸的破胶性能评价  

The breaking behavior of viscosity-variable-diverting-acid

作　　者：王彦玲[1] 徐超[1] 金家锋[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《应用化工》2014年第4期625-628,共4页Applied Chemical Industry

基　　金：山东省科技攻关计划项目(2010GSF10601)

摘　　要：制备了成胶酸,用清水、煤油、柴油对变粘分流酸的破胶性能进行了评价。结果表明,在不添加破胶剂的前提下,成胶酸与清水的比例为1∶25时,酸液粘度小于5 mPa·s,已达到破胶要求,且破胶后的溶液澄清、无残渣,溶液的表、界面张力均明显降低,能够快速、彻底返排出地层,减少对地层的伤害;成胶酸与煤油或柴油的比例为1∶3时,酸液在温度为90℃和高速搅拌产生的较大剪切应力作用下也能破胶,煤油的破胶效果要比柴油好。清水破胶机理主要是由于清水的稀释作用,使得表面活性剂的浓度低至不能满足胶束空间网状结构所需要的最低浓度,体系粘度大大降低。烃类物质破胶是由于原油等烃类物质能够进入到乏酸空间网状结构的内部,使其分解为小的球状结构,从而实现破胶。The break character of viscosity-variable-diverting-acid is investigated by using distilled water, kerosene and diesel,respectively. The results show that the acid viscosity is less than 5 mPa·s and realize gel breaking when the ratio of gel forming acid and distilled water without gel breaker,and the solution after gel breaking gel is clear,colorless and non-residue. It also realize gel breaking when the ratio of gel forming acid and kerosene or diesel is 1 ∶ 3 at 90 ℃ and great shearing stress,and the gel breaking result of kerosene is better than diesel. According to the results,the gel breaking mechanism of water is primarily that water can dilute solution,the concentration of the active agent micelle so low that not meeting the required minimum to form space structure,the viscosity is greatly declined. The gel breaking mechanism of hydrocarbon,due to hydrocarbons can enter the internal space structure of the lack of an acid,then break down into small spherical structure,achieve gel breaking.

关 键 词：变粘分流酸 表观粘度 破胶 表面张力 界面张力 

分 类 号：TQ2[化学工程—有机化工] TQ31