SELECTIVE STEAM FOAM SOAK OIL RECOVERY PROCESS

摘要

K-8935 SELECTIVE STEAM FOAM SOAK OIL RECOVERY PROCESS of the Invention In a steam soak oil recovery process in a heavy oil reservoir which is susceptible to gravity override, improved results are obtained by injecting the steam in the form of a steam-foam-forming mixture which has a chemical selectivity for being more mobile within the reservoir in contact with the reservoir oil than in the absence of that oil.