C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/68 (2006.01) B01F 17/52 (2006.01) C09K 8/584 (2006.01) C09K 8/74 (2006.01) E21B 43/04 (2006.01) E21B 43/22 (2006.01) E21B 43/26 (2006.01)
Patent
CA 2674113
The invention discloses a well treatment composition for use in a subterranean formation comprising: a carrier fluid; and a viscoelastic surfactant being present in a concentration of less than about 1.5% by weight. Optionally, the fluid comprises a crosslinked polymer in a thickening amount in the carrier fluid. The invention also discloses a method to increase the viscosity of a fluid, the method comprising: providing a fluid comprising a thickening amount of a crosslinked polymer; adding a viscoelastic surfactant at a given concentration to the fluid; taking the fluid to a given temperature; defining a viscosity profile of the fluid depending of the concentration and the temperature; comparing said viscosity profile to a viscosity profile of the crosslinked polymer fluid alone; and defining an optimum concentration of the viscoelastic surfactant for each temperature.
Buelvas Manuel Jose Lastre
Milne Arthur
Schlumberger Canada Limited
Smart & Biggar
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