E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/28 (2006.01) C09K 8/74 (2006.01)
Patent
CA 2711905
In a method of treating a sandstone-containing formation penetrated by a wellbore, a treatment fluid comprising an aqueous fluid containing a Bronsted acid, a hydrogen fluoride source and an organic acid or salt thereof that is substantially soluble in the aqueous fluid is formed. The treatment fluid contains less than about 2% of fluoride (F) by weight of the fluid and from 2% or less of sodium (Na+) by weight of the fluid. The treatment fluid is introduced into the formation through the wellbore as a single-stage without introducing an acid-containing fluid preflush into the formation prior to introducing the treatment fluid.
L'invention concerne un procédé qui permet de traiter une formation contenant du grès pénétrée par un puits de forage et consiste à former un fluide de traitement comprenant un fluide aqueux contenant un acide de Brönsted, une source de fluorure d'hydrogène et un acide organique ou un sel de celui-ci qui est pratiquement soluble dans le fluide aqueux. Le fluide de traitement contient moins d'environ 2 % de fluorure (F-) en poids du fluide et 2 % ou moins de sodium (Na+) en poids du fluide. Le fluide de traitement est introduit dans la formation par le puits de forage dans le cadre d'une étape unique, sans introduire un bouchon de tête de fluide contenant de l'acide dans la formation avant d'introduire le fluide de traitement.
Bulte Helene
Davies Stephen Nigel
Frenier Wayne W.
Fu Diankui
Lecerf Bruno
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
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