Viscoelastic surfactant fluid systems comprising an aromatic...

Details Viscoelastic surfactant fluid systems comprising an aromatic... Viscoelastic surfactant fluid systems comprising an aromatic...

E - Fixed Constructions

21

B

E21B 43/26 (2006.01) C09K 8/62 (2006.01)

Patent

CA 2610654

Methods of improving shear recovery time of viscoelastic surfactant fluid systems are described, one method involving providing a viscoelastic surfactant fluid system comprising a major portion of a surfactant and a rheology enhancer in a concentration sufficient to shorten shear recovery time of the fluid system compared to shear recovery time of the fluid system absent the rheology enhancer, the rheology enhancer selected from aromatic sulfonates having a molecular weight of at least 500; and injecting the fluid system down a well. The rheology enhancer may be a lignosulfonate derived from wood pulping. Viscoelastic surfactant systems including the rheology enhancer are also described.

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