高温合成聚合物压裂液体系研究  

Study of High Temperature Synthetic Polymer Fracturing Fluid

作　　者：何春明[1] 陈红军[2] 刘超[1] 卢智慧[3] 

机构地区：[1]西南石油大学研究生部,四川成都610500 [2]西南石油大学材料学院,四川成都610500 [3]中国石化西北油田分公司,新疆乌鲁木齐830013

出　　处：《油田化学》2012年第1期65-68,共4页Oilfield Chemistry

基　　金：国家自然科学基金项目"油气层岩矿酸损伤理论研究"(项目编号51074138)

摘　　要：根据高温低渗储层压裂改造对压裂液性能的要求,从聚合物分子结构分析入手,以聚丙烯酰胺、聚丙烯酸、2-丙烯酰胺基,2-甲基丙磺酸(AMPS)为单体,合成新型耐高温聚合物,并对其性能进行了评价。实验结果表明,剪切3 h后,压裂液黏度降低1.4 mPa.s,剪切稳定性良好,并且剪切恢复性较好。随着温度的增加,压裂液交联时间逐渐缩短。该压裂液耐温可达170℃。在60℃时,聚合物压裂液破胶困难,可以通过提高破胶剂加量以提高压裂液破胶效果。聚合物压裂液的残渣率为0.83%,对岩心的伤害率为16.7%,对支撑裂缝导流能力的伤害小于植物胶压裂液。适合高温低渗储层的压裂改造。According to the requirement of high-temperature low permeability reservoir hydraulic fracturing treatment to the propriety of fracturing fluid, a novel high temperature polymer was synthesized by polyacrylic acid, polyacrylamide, 2-acrylamido-2- methylpropanesulfonlc acid（AMPS）. Performance evaluation experiment results showed that the viscosity of fracturing fluid decreased by 1.4 mPa.s after shearing 3 hrs, which possessed good shear stability and viscosity recovery propriety. The crosslinking time gradually decreased with increasing temperature. The temperature resistance of fracturing fluid reached to 170℃. The fracturing fluid was difficult to break at 60℃, which could be overcome through increasing the dosage of gel breaker. The residue of polymer fracturing fluid was of 0.83%, and the damage to core matrix was only 16.7%. The damage to propped fracture was far less than guar gum fracturing fluid which was fit for the stimulation of high-temperature low permeability reservoir.

关 键 词：压裂液 瓜尔胶 聚合物 高温 性能 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程] O648.1[理学—物理化学]