Aqueous viscoelastic fluid

Details Aqueous viscoelastic fluid Aqueous viscoelastic fluid

2002-02-13

2008-08-12

Gulakowski, Randy (Department: 1796)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S248000, C507S260000, C507S265000, C507S266000, C507S267000, C166S271000, C166S308200

Reexamination Certificate

active

07410934

ABSTRACT:
The invention concerns an aqueous viscoelastic fluid for use in the recovery of hydrocarbons. According to the invention, the aqueous viscoelastic fluid comprises a monomer, a dimer or an oligomer of a viscoelastic surfactant able to form a viscoelastic gel under downhole conditions, said surfactant comprising a hydrophobic tail and a hydrophilic head, and being of the following formulae: R—X—Y-Z where R is the hydrophobic tail of the surfactant, Z is the hydrophilic head of the surfactant, said hydrophilic head being charged, X is a stabilising group and Y chain is a linear, saturated or unsaturated, hydrocarbon chain of 1, 2 or 3 carbon atoms or a branched, saturated or unsaturated hydrocarbon chain wherein the main chain is of 1, 2 or 3 carbon atoms, possibly incorporating an aromatic ring.

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