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US 12,662,623 B2Granted
Compositions and methods for foam stimulation
AssigneeChevron U.S.A. Inc.
InventorsVaradarajan Dwarakanath, Taimur Malik, Lin Zuo, Jimin Daniel Zhou, Nabijan Nizamidin, Gregory A. Winslow, Reza Banki, Mohamad Salman
Life of this patent
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Abstract
Disclosed are foam precursor compositions, foamed compositions, and methods of using these foamed compositions for the stimulation of unconventional reservoirs.
Claims15
An aqueous foam precursor composition for use in stimulating an unconventional subterranean formation comprising hydrocarbons, the aqueous foam precursor composition comprising:
- a surfactant package comprising a primary foaming surfactant and one or more secondary surfactants, wherein the primary foaming surfactant comprises an anionic surfactant and the one or more secondary surfactants comprise an alkoxylated C6-C32 alcohol wherein the primary foaming surfactant is present in an amount of from 0.1% to 2.5% by weight, based on a total weight of the aqueous foam precursor composition;
- and
- water, wherein the water is present in an amount of 50% to less than 100% by weight, based on a total weight of the aqueous foam precursor composition;
- wherein the aqueous foam precursor composition exhibits an interfacial tension (IFT) of from 0.05 dynes/cm to 0.5 dynes/cm, between the foam precursor composition and the hydrocarbons present in the unconventional subterranean formation.
1 more element
Dependencies are inferred from the claim text.