【摘要】：以2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、丙烯酰胺(AM)和對苯乙烯磺酸鈉(SSS)為聚合單體,采用反相乳液聚合法制備了一種水基鉆井液降濾失劑PAAS,通過正交實驗確定了最佳合成條件,采用FTIR及EA(元素分析)對其結構進行了表征,采用TG-DTG對其耐溫性進行了分析。通過鉆井液流變性、濾失性及抑制性實驗對降濾失劑PAAS應用性能進行了考察,并對其降濾失機理進行了推測。結果表明:PAAS具備良好的高溫穩(wěn)定性,各類功能基團在溫度升至225℃時均未發(fā)生明顯的熱分解現象;鉆井液流變性實驗、老化實驗及失水實驗表明:w(PAAS)=1.5%(以體系總質量計,下同)時,鉆井液流變性良好,動塑比(YP/PV)=0.30 Pa/(m Pa·s),高溫160℃老化前后失水量分別為8.4 mL和10.2 mL。功能基團含量漸變實驗、SEM和橫向弛豫時間(T_2)結果表明:該降濾失劑主要通過吸附作用改善鉆井液體系抗濾失性能。
[Abstract]:A water-based drilling fluid filter reducer PAAS, was prepared by reverse emulsion polymerization using 2-acrylamide 2-methylpropyl sulfonic acid (AMPS), acrylamide (AM) and sodium p-styrene sulfonate (SSS) as polymerization monomers. The optimum synthesis conditions were determined by orthogonal experiment. The structure was characterized by FTIR and EA, and the temperature tolerance was analyzed by TG-DTG. The application performance of PAAS was investigated by experiments of rheology, filtration loss and inhibition of drilling fluid, and the mechanism of filtration reduction was speculated. The results show that PAAS has good high temperature stability, and no obvious thermal decomposition occurs when the temperature rises to 225 鈩，

本文編號：2426061