The invention concerns an aqueous viscoelastic fluid for use in the recovery of hydrocarbons. According to the invention, the aqueous viscoelastic fluid comprises a monomer, a dimer or an oligomer of a viscoelastic surfactant able to form a viscoelastic gel under downhole conditions, said surfactant...http://www.google.es/patents/US7410934?utm_source=gb-gplus-sharePatente US7410934 - Aqueous viscoelastic fluid
