Earth boring – well treating – and oil field chemistry – Well treating – Contains intended gaseous phase at entry into wellbore
Patent
1996-06-05
1999-08-24
Tucker, Philip
Earth boring, well treating, and oil field chemistry
Well treating
Contains intended gaseous phase at entry into wellbore
507233, 507234, 507255, 507261, 507265, 507267, 507927, 507929, 166263, 166304, 166371, C09K 300, E21B 4300, E21B 3706
Patent
active
059424699
ABSTRACT:
A composition for and an improved process of, enhancing petroleum recovery from a petroleum reservoir by injecting said composition into the reservoir through a wellbore are provided. The aqueous composition is derived from a concentrate which includes a defoaming agent, a demulsifying agent, and optionally a stabilizing agent suitable for stabilizing the concentrate as an aqueous emulsion. In one embodiment, the defoaming agent is dispersed in carrier solvent and the concentrate further includes an emulsifying agent suitable for emulsifying the carrier solvent in water. The composition is preferably injected at a high pumping rate directly into the formation through the tubing-casing annulus and allowed to permeate into the reservoir surrounding the wellbore before oil production commences. The composition and method are particularly suited for used in conjunction with steam injection oil recovery techniques.
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Davis Bruce W.
Juprasert Max S.
Chevron U.S.A. Inc.
Tucker Philip
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