Microemulsion method for improving the injectivity of a well
This patent describes a method for improving the injectivity of an injection well for water or gas injection into an underground hydrocarbon formation penetrated by the injection well. It comprises injecting into an underground hydrocarbon formation through an injection well a sufficient amount of a solvent-in-water microemulsion to treat the formation within a radial distance of about 5 to about 100 feet from the injection well, the solvent-in-water microemulsion comprising about 0.5% to about 5% by weight of an alkoxylated linear alcohol having about 10 to about 16 carbon atoms in the linear alcohol moiety and an average of about 5 to about 12 alkoxylate groups, about 0.5% to about 5% by weight of an alkylbenzene sulfonate having an alkyl chain of about 8 to about 20 carbon atoms, about 1% to about 10% by weight of an ethylene glycol alkylether solvent, and water.
- Assignee:
- Texaco Inc., White Plains, NY (United States)
- Patent Number(s):
- US 5095989; A
- Application Number:
- PPN: US 7-658492
- OSTI ID:
- 5289074
- Resource Relation:
- Patent File Date: 21 Feb 1991
- Country of Publication:
- United States
- Language:
- English
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