Method to enhance the recovery of oil from an oil field, comprising: applying heat to a colloidal hydrocarbonic medium that comprises hydrocarbon chains； and applying pressure waves having a predetermined frequency and intensity to hydrocarbon chains, in order to crack hydrocarbon chains into relatively shorter hydrocarbon chains. Optionally: applying heat may comprise applying steam； the pressure waves may be applied directly or indirectly to hydrocarbon chains to be cracked； applying pressure waves may be performed within the oil field, by use of an Activator within or outside of the oil field； applying pressure waves may be performed within the oil field； applying pressure waves may be performed by use of a rotor situated in a housing pervaded by the colloidal hydrocarbonic medium.
