Laboratory Experimental Study on Polymer Flooding in High-Temperature and High-Salinity Heavy Oil Reservoir

Polyacrylamide (HPAM) and other traditional polymers have poor temperature resistance salinity tolerance do not meet the needs of high-temperature high-salinity reservoirs. In this study, a new temperature-resistant salinity-tolerant polymer QJ75-39 was synthesized using acrylamide (AM) as hydrophilic monomer, 1-acrylamide-2-methylpropanesulfonic acid (AMPS) N-vinylpyrrolidone (NVP) functional monomers DS-16 hydrophobic monomer. Through laboratory experiments, properties (temperature resistance, aging stability), injection core displacement effect were studied. The experimental results showed that could flooding technology in Experiments had 95 °C 1.66 × 105 mg/L. When TDS 55,376.8 mg/L, viscosity 31.3 mPa s, remained above 30 mPa·s after for 60 days. good injectivity between 300 600 mD, pressure reach equilibrium quickly. oil recovery effectively increased with grsowth amount injected polymer. 0.5 PV, enhanced 20.65%. This study is great significance application popularization