Stabilization and performance of a novel viscoelastic N2 foam for enhanced oil recovery

• A novel viscoelastic N 2 foam for chemical enhanced oil recovery was developed. • Oil recovery efficiency of N 2 foam was evaluated in Xinjiang Oilfield conditions. • The mechanism of N 2 foam stability was explained by the viscoelasticity theory. A novel viscoelastic N 2 foam (0.12% sodium dodecyl sulfate + 0.18% erucyl dimethyl amidopropyl betaine) with ultra-low interfacial tension and alkali-free was developed. With the conditions of...