摘要
乳化酸是一种适用于低渗透储层的酸化液,具有降低酸岩反应速率,深部酸化的优点。针对台兴油田敏感性油藏,分析其地层和岩芯特征,研制出了适合低渗、低能油井的乳化酸配方,并通过室内试验对该配方的配伍性、破乳性能、热稳定性、粘度、防膨性、腐蚀率和缓蚀速率进行了评价。实验结果表明:各种添加剂和土酸无分层或沉淀;破乳率在4 h基本达到85%以上;配制的乳化酸在80℃下2 h稳定性良好;乳化酸对粘土的膨胀率小于土酸对粘土的膨胀率;缓速性能良好。
Emulsified acid is acidizing fluid which is used for low permeable layer,its advantages is reducing the reaction rate between acid and rock,and deep acidification. Based on the sensitive reservoir properties of Taixing oilfield,new formula of emulsified acid was developed by analyzing its formation and core characteristics,it suits low permeable and low energy wells,its compatibility,deemulsification,thermal stability,viscosity,anti-swelling and corrosion rate were evaluated by laboratory experiments,experiment results show that all additives used in emulsified acid have no statified or precipitation reaction with soil acid; demulsification rate basically reached 85% at 4 h; the developed emulsified acid kept good stability of 2 h at 80 ℃ ; comparing with soil acid,emulsion acid has low effect on clay swelling; its retardation performance is good.
出处
《常州大学学报（自然科学版）》
CAS
2013年第3期33-36,共4页
Journal of Changzhou University：Natural Science Edition
关键词
乳化酸
酸化
深部酸化
台兴油田
emulsified acid
acidification
deep acidification
Taixing oilfield
