高温酸液稠化剂的制备和性能表征

Preparation and characterization of high temperature acid thickener

目前常规酸化井由于钻井深度逐年加深,井底温度可达到180℃左右,以丙烯酰胺(AM)和甲基丙烯酰氧乙基三甲基氯化铵(DMC)作为单体,通过氧化还原—偶氮引发剂体系的二段聚合法进行聚合反应。根据对产物的增粘效果,耐温耐剪切效果的测试,研究了合成因素对产物的影响,得到在乳化时长2 min~3 min,一段反应升温速率0.3℃/min~0.5℃/min,条件下可以得到最佳的乳液合成产物;通过对反应产物的FTIR,NMR,TGA表征结果的分析,得出了反应产物的物性和分子结构,实验结果证明,合成产物具备耐180℃剪切能力。

At present,due to the deepening of drilling depth year by year,the bottom hole temperature of conventional acidizing Wells can reach about 180℃.Acrylamide(AM)and methylacryloxyethyl trimethyl ammonium chloride(DMC)are used as monomers to polymerize through the two-stage polymerization method of REDOX-azo initiator system.According to the test of viscosification effect,temperature resistance and shear resistance of the product,the influence of synthesis factors on the product was studied.The optimal emulsion synthesis product could be obtained under the conditions of emulsification duration of 2 min~3 min and one-stage reaction heating rate of 0.3℃/min~0.5℃/min.Through the analysis of FTIR,NMR,TGA characterization results of the reaction products,the physical properties and molecular structures of the reaction products were obtained.The experimental results show that the synthesized product has the shear resistance of 180℃.