Wells – Processes – Placing fluid into the formation
Patent
1997-11-06
2000-03-14
Neuder, William
Wells
Processes
Placing fluid into the formation
166280, 507266, 507922, E21B 4326
Patent
active
060359366
ABSTRACT:
Viscoelastic surfactant fluids for fracturing subterranean formations penetrated by a wellbore. The surfactant fluids are comprised of an aqueous medium; an effective amount of an inorganic water soluble salt; and an effective amount of at least one surfactant selected from the group consisting of: i) anionic surfactants; ii) nonionic surfactants; and iii) hydrotropic surfactants. The surfactant compositions can be further stabilized and the viscosity increased by the addition of one or more hydrophobic organic alcohols. This invention also relates to a method for fracturing subterranean formations using said viscoelastic surfactant fluids.
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Brown, J. Ernest, King, Lee R., Nelson, Erik B., Schulumberger Dowell, and Ali, Syed A., Chevron U.S.A., "Use of Viscoeleastic Carrier Fluid in Frac-Pack Applications", Society of Petroleum Engineers Paper 31.114, pp. 439-441, 1996.
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