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Surfactants are widely used in enhanced oil and gas recovery. Surfactants are usually injected into wells and reservoirs that are released in full upon the addition, and effectiveness lasts very short. Slow‐release surfactant is preferred to be effective at an extended period. In this study, surfactant was encapsulated into the crosslinked hybrid hydrogel of polyvinyl alcohol (PVA) and poly acrylamide‐2‐methyl...
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