阳离子聚丙烯酰胺PG-1稠化的土酸有机酸混合酸化液的性能  

Performance Properties of Organic Mud Acidizing Fluid Gelled with Cationic Polyacrylamide PG-1

作　　者：潘敏[1] 陈大钧[1] 

机构地区：[1]西南石油大学化学化工学院,四川成都610500

出　　处：《油田化学》2007年第2期109-112,共4页Oilfield Chemistry

摘　　要：以煤油为外相进行反相乳液聚合，合成了AM／DMDAAC共聚物，将反应后的反相乳液干燥、洗涤，得到了粉末状酸液稠化剂PG-1，并用于稠化土酸有机酸混合酸。该酸液组成如下：7％～10％盐酸＋2％氢氟酸＋5％-8％乙酸。与国内常用酸液增稠剂CT1—6相比，在该混合酸液中PG-1的增稠性较好，耐温性略好，抗剪切性基本相同，缓速性略好，热稳定性和耐盐性良好。1.5％PG-1稠化混合酸的黏度（30℃，170s^-1）为34。6mPa·s；在90℃加热2h后和在30℃、1701／s剪切2惦，黏度均大于25mPa·s；在60℃、90℃加热4h后，黏度保留度分别为88．7％、81．2％；在60℃、90℃与孤南24块砂岩岩屑反应的有效时间超过12h。用矿化度40g／L的标准盐水配制的PG-1稠化混合酸在90℃放置4h或在常温放置15d，外观无显见的异常。图4表2参6。An AM/DMDAAC copolymer is synthesized by inversion emulsion polymerization with kerosene as dispersion phase and a powdered thickener, PG-1, for acidizing fluids is prepared by drying the inversion emulsion and washing the separated polymerizate and is used for gelling a mixed organic/mud acid. The later is composed of 7--10% hydrochloric, 2% hydrofluoric, and 5--8% acetic acids. In comparison with a commonly used acid thickener,CT1-6, PG-1 in the mixed acid has better thickening capacity, similar shearing resistance,a little better heat resistance and retarding capacity; its thermal stability and salt tolerancy are fair good. For 1.5% PG-1 gelled mixed acid,the apparent viscosity at 30℃ and 170 1/s is of 34.6 mPa＇s and is kept at a level of 〉25 mPa·s after 2 b.a＇s＇ heating at 90℃ or 2 hrs＇ shearing at 170 1/s, the apparent viscosity retention is of 88.7% and 81.2% after 4 hrs＇ heating at 60℃ and 90℃, respectively, and the reaction between the gelled mixed acid and the cuttings of southern Gu-24 blocked sandstone reservoir can proceed effectively over 12 hrs＇ and more. PG-1 gelled mixed acid prepared in a standard brine of TSD =40 g/L shows no abnormal phenomenon in appearance after standing over 4 hrs at 90℃nor over 15 days at ambient temperatures.

关 键 词：阳离子聚丙烯酰胺 丙烯酰胺共聚物 稠化剂(增黏剂) 酸液添加剂 稠化酸(胶凝酸) 缓速酸 土酸有机酸混合酸 应用性能 反相乳液聚合物 

分 类 号：TE357.22[石油与天然气工程—油气田开发工程] TE39