Steam foam surfactants enriched in alpha olefin disulfonates for

Wells – Processes – Distinct – separate injection and producing wells

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166303, 252 8554, E21B 4322, E21B 4324

Patent

active

050316982

ABSTRACT:
An improved process for recovering oil by flowing a mixture of steam and steam foam surfactant into an oil-containing subterranean reservoir, the improvement provided by using surfactants enriched in olefin disulfonate. The surfactants may be used in either a steam drive or a steam soak process. Disulfonate-enriched steam foam surfactants and mixtures are also described.

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