Multicomponent viscoelastic surfactant fluid and method of...

C - Chemistry – Metallurgy – 09 – K

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C09K 8/68 (2006.01) C09K 8/575 (2006.01) E21B 43/26 (2006.01) E21B 43/267 (2006.01)

Patent

CA 2677669

There is a viscoelastic fluid. The fluid has one or more cationic surfactants selected from the group consisting of certain quaternary salts, certain amines, and combinations thereof; one or more anionic polymers/anionic surfactants; one or more of certain zwitterionic/amphoteric surfactants; and water. There is also a method of fracturing a subterranean formation. The viscoelastic fluid is pumped through a wellbore and into a subterranean formation at a pressure sufficient to fracture the formation. There is also a method for gravel packing a subterranean formation.

L'invention a pour objet un liquide viscoélastique. Le liquide contient un ou plusieurs tensioactifs cationiques choisis dans le groupe constitué par certains sels quaternaires, certaines amines et des combinaisons de ceux-ci, d'un ou plusieurs mélanges de polymères anioniques/tensioactifs anioniques, d'un ou de plusieurs tensioactifs zwitterioniques/amphotères et d'eau. Il existe également un procédé de fractionnement d'une formation souterraine. Le liquide viscoélastique est pompé à travers un trou de forage jusque dans une formation souterraine à une pression suffisant à fractionner la formation. Il existe également un procédé de gravillonnage d'une formation souterraine.

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