疏水聚合物压裂液稠化剂PDAM-16的合成与评价  

Synthesis and evaluation of a hydrophobic associating polymer PDAM-16 as fracturing thickener

作　　者：马喜平[1] 杨立 张蒙 石伟[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：《化学研究与应用》2017年第9期1362-1369,共8页Chemical Research and Application

摘　　要：以二甲氨基丙基甲基丙烯酰胺(DMAPMA)和溴代十六烷为原料,合成了一种季铵盐阳离子疏水单体DA-16。并以DA-16、丙烯酰胺(AM)和二甲基二烯丙基氯化铵(DMDAAC)为单体,在水溶液中进行自由基聚合得到三元共聚物PDAM-16,用FTIR表征了其结构,考察了单体配比、反应温度、时间及引发剂浓度等条件对聚合反应的影响。评价了PDAM-16的溶液性质和交联性能,结果表明:PDAM-16溶液的临界缔合浓度为0.5 g/d L,具有优异的抗温、抗盐、抗剪切性;合适的交联条件为:交联剂用量为0.1%,交联温度70℃,PDAM-16用量0.6%,在此条件下,交联后最高黏度可达313m Pa·s。以交联后的PDAM-16作为压裂液稠化剂,其性能评价表明:该体系耐温达123℃,抗剪切性好,具有良好的悬砂、破胶性能,便于返排,与常规胍胶压裂液相比,降低了液体对地层的伤害。Hydrophobic monomer（ DA-16） which could meet the basic requirements of fracturing fluids and the rule of molecular de-signing was synthetized with dimethyl aminopropyl methacrylamide and 1-Bromohexadecane in acetone. A hydrophobic association polymer（ PDAM-16） has been synthesized with acrylamide（ AM） ,diallyl dimethyl ammonium chloride（ DMDAAC） ,and hydropho-bic monomer（ DA-16） by surfactant method and has been characterized by infrared. The optimum reaction conditions were obtained by single factor analysis. The critical associating concentration of PDAM-16 solution was about 0. 5 g/dL. The viscosity retention rate was 51 % after the temperature of solution being increased from 20℃ to lOO℃ , the viscosity was 20mPa · s when the addition of CaCl2was 0. 5 g/dL, and the viscosity retention rate was 96% after being sheared for 2h at 170 s 1. The viscosity of PDAM-16 crosslinked by acetyl acetone zirconium was up to 313 mPa · s when the amount of crosslinking agent was 0. 1%. The performance of the cross-linked PDAM-16 as fracturing fluid thickener was evaluated. The results showed that this system could reach a tempera-ture resistance of 123℃ and showed good shear resistance, good sand carrying ability. This system was easy to break gel, which meant it had little damage to formation.

关 键 词：疏水缔合聚合物 稠化剂 交联 压裂液 性能评价 

分 类 号：O632.51[理学—高分子化学]