低伤害高温酸化缓蚀剂AI-811的开发及机理

PERFORMANCE OF INHIBITOR AI-811 FOR HIGH TEMPERATURE ACIDIFICATION OF OIL WELL

低伤害、耐高温缓蚀剂AI - 811是以咪唑啉季铵盐为主体 ,并复合含S、含酮、含酰胺的混合成分 ,适用于HCl、盐酸 /氢氟酸 (HCl/HF)及醋酸等有机混合酸液体系 .其主要特点是高温缓蚀效果好 ,可预防或大大降低酸液对低渗储层的伤害 ,使用浓度低 ,气味极小 ,与酸液中的其他添加剂配伍性好 ,适用性强 ,与缓蚀增效剂AI - 80 0协同使用可在高达 190℃下显示独特的优良缓蚀性能 .用CC - 10 -S高温高压动态腐蚀实验仪对AI - 811的高温缓蚀性能进行了评价 .结果表明 :AI- 811及其AI- 80 0在高温、高压、动态条件下对各种酸溶液具有很好的缓蚀效果 ,可使N - 80油管钢在高达 190℃的储层温度下腐蚀速度大幅度降低 ,平均腐蚀速度 <10 0 g/m2

AI-811 is a good inhibitor for high temperature acidification of oil-well with featare of low degree of damage to the low permeability oil reservoir rock.It 's key component are imidazolium compounds with sulphur,ketone,and amides. AI-811 is suitable for acid systems of HCl,HCl/HF and the mixture of HAC.The principal property of the inhibitor is premium inhibition rates at high temperature.It can prevent or decrease the damage of acid fluid to the low-permeability oil reservoir rock. The mixture system of AI-811 inhibitor and AI-800 intensifier has good inhibition efficrency at 190℃. The CC-10-S corrosion apparatus is used for evaluating AI-811 in dynamic condition in this paper.The results show that AI-811 inhibitor plus and AI-800 intensifier has quite good inhibition efficiency in different acid fluid types,the average corrosion rate <100 g/m 2·hr.