Surfactant based viscoelastic fluids

Details Surfactant based viscoelastic fluids Surfactant based viscoelastic fluids

2003-01-15

2009-12-29

Zimmer, Marc S (Department: 1796)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S248000, C507S250000, C507S269000, C507S266000, C507S276000, C507S255000

Reexamination Certificate

active

07638468

ABSTRACT:
The invention relates to surfactant based viscoelastic fluids for enhancing the productivity of a hydrocarbon-bearing formations, such as oil wells. The viscoelastic fluids of the invention have particular applicability in acid fracturing of subterranean formations surrounding oil and gas wells. The viscoelastic fluid contains an inorganic acid and at least one C10to C24alkyl trialkyl quaternary ammonium aromatic salt such as quaternary ammonium salicylate or phthalate. An anionic surfactant may also be present in the viscoelastic fluid. The addition of the C10to C24alkyl trialkyl quaternary ammonium aromatic salt to the inorganic acid causes gellation of the acid.

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