Synthesis and properties of elevated temperature hydrogels for enhanced oil recovery based on AM/AMPA/NVP copolymer and silica nanoparticles

• DOI: 10.1002/app.54583
• Publication Date: 2023-08-23T11:15:20Z
• Authors: Pingde Liu; Song Zhang; Falin Wei; Jing Lv; Pan Xu
• Keywords: Thermal Stability

Abstract To improve the stability of polymer gel profile control agents used in high‐temperature and high‐salinity reservoirs, temperature‐resistant salinity‐resistant (TSP) was synthesized from acrylamide (AM), 2‐acrylamido‐2‐methylpropane sulfonic acid (AMPS), N‐vinyl‐2‐pyrrolidone (NVP) via free radical polymerization reaction using initiator. The TSP showed excellent salt resistance thermal because introduction group, hydrophobic rigid group. Furthermore, a novel elevated temperature hydrogel (ETG) for prepared TSP, crosslinker hexamethylenetetramine‐hydroquinone (HMTA‐HQE), silica nanoparticles as an enhancer. formula ETG follows: 0.5 wt% + 0.3 HMTA‐HQE 0.2 (enhancer). SEM FTIR analyzed micromorphology composition ETG. Under high salinity (110°C, 85702 mg/L), apparent viscosity reached up to 3 × 10 4 mPa·s, controllable gelation time 10–20 h. After aging 120 days at 110°C, retention rate more than 75%, indicating had better stability. Moreover, plugging ratio 97.8%, while conventional HPAM only 81.2%, which indicated that also good performance.