Mixed anionic surfactant composition for oil recovery
AssigneeChristie Huimin Berger
InventorsPaul Daniel Berger, Christie Huimin Berger
Life of this patent
Estimating the term…
Abstract
A composition for recovering oil from subterranean formation by injecting an aqueous fluid containing from about 0.05 to about 2.0% by weight of a bi-functional surfactant or a mixture of surfactants containing one or more of the following structures; Optionally the aqueous fluid may contain mixtures of individual surfactants having carboxylic, and sulfonate or sulfate functionalities. The remainder of the composition includes water or brine, a cosolvent and optionally a viscosity control agent, and optionally an alkali.
Claims12
A composition for the recovery of oil from subterranean reservoirs comprised of
- a) one or more surfactants having weak and strong anionic functionality groups,
- b) an aqueous based solvent,
- c) one or more co-surfactants/solvents,
- d) optionally a viscosity increasing agent, and
- e) optionally an alkali.
Dependencies are inferred from the claim text.