Lignin amine microemulsions
AssigneeTexaco Inc.
InventorMichael G. DaGue
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Abstract
The invention is a method of recovering hydrocarbons from an underground hydrocarbon formation having at least one injecting well and at least one production well which comprises injecting a microemulsion into the formation through an injection well, driving said microemulsion through the formation and producing hydrocarbons through a production well, said microemulsion comprised of an internal phase of a primary amine having from about 8 to about 22 carbon atoms, lignin, a water-soluble anionic sulfonate surfactant, a solubilizer and an oil, and an external phase of brine.
Claims13
A method of recovering hydrocarbons from an underground hydrocarbon formation having at least one injection well and at least one production well, comprising:
- injecting into the formation through an injection well a microemulsion comprising an internal phase of a primary amine having from about 8 to about 22 carbon atoms, lignin, a water soluble anionic surfactant, a solubilizer and an oil, and an external phase of brine comprising greater than about 90% by weight of the microemulsion;
- driving said microemulsion through the formation;
- and
- producing hydrocarbons through a production well.
A method of recovering hydrocarbons from an underground hydrocarbon formation having at least one injection well and at least one production well, comprising:
- injecting into the formation through an injection well a microemulsion comprising an internal phase of about 0.1% to about 0.3% tallow amine, about 0.75% to about 1.5% lignosulfonate, about 0.5% to about 1.25% anionic petroleum sulfonate, about 0.5% to about 1.25% alkylphenol ether sulfate, and about 0.5% to about 3% of mineral oil, and an external phase of brine comprising greater than about 90% by weight of the microemulsion;
- driving said microemulsion through the formation;
- and
- producing hydrocarbons through a production well.
Dependencies are inferred from the claim text.