抗高温耐盐型钻井液降粘剂TMAJ的合成与性能评价
Synthesis and Performance Evaluation of High Temperature and Salt Resistant Drilling Fluid Viscosity Reducer TMAJ

采用水溶液聚合反应合成了单宁(TA)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)及二甲基二烯丙基氯化铵(DMDAAC)的三元共聚物，将合成的共聚物作钻井液降粘剂，命名为TAMJ，并对TMAJ的降粘效果进行了室内评价。利用扫描电镜和激光衍射粒度分析仪对TMAJ的微观结构和粒度分布进行表征。实验结果表明：该降粘剂可以降低钻井液的动切力和100 r/min数值，并具有良好的抗高温、耐盐及抗钙性能。
A terpolymer of tannin (TA), 2-acrylamide-2-methylpropanesulfonic acid (AMPS) and dimethyldiallylammonium chloride (DMDAAC) was synthesized by aqueous solution polymerization. The synthesized copolymer was used as a drilling fluid viscosity reducer and named TAMJ. The viscosity reduction effect of TMAJ was evaluated indoors. The microstructure and particle size distribution of TMAJ were characterized by scanning electron microscopy and laser diffraction particle size analyzer. The experimental results show that the viscosity reducer can reduce the dynamic shear force and 100 r/min value of the drilling fluid, and has good high temperature resistance, salt resistance and calcium resistance.