The composition aguosa acidic thickened, and processes for the thickening of an aqueous mixture and acid for acidification of an underground formation, and well stimulation fluid

摘要

"Acid composition thickened and uses of the same.The present invention generally relates to aqueous acid compositions thickened with a gelling agent amidoamina oxide and / or a viscoelastic surfactant of general formula (I) in which R ~ 1 ~, is a group of straight chain or branched aliphatic, saturated or unsaturated since aproximadam Between 7 to about 30 carbon atoms.R ~ 2 ~ is an alkylene group divalente from 2 to 6 carbon atoms which may be linear or branched, substituted or non substituted and R ~ 3 ~ R ~ 4 ~ are independent groups (C ~ 1 ~ C ~ 4 ~ alkyl or hidroxialquila or together they form a ring of six elements Hetrocyclic and R ~ 5 ~ is hid Rogu00eanio or a group C ~ 1 - C ~ 4 ~ alkyl or hidroxialquila.The above gelling agent advantageously provide gels which do not suffer from phase separation for extended period of time and exhibit high thermal stability. The gels of the invention have applications in thickened acid cleaners and degreasers household and industrial applications, in the stimulation of oil field and the like.