Selective fracture face dissolution

Details Selective fracture face dissolution Selective fracture face dissolution

C - Chemistry, Metallurgy

09

K

C09K 8/72 (2006.01)

Patent

CA 2577874

A method is given for acid fracturing a subterranean formation for improving the flow of fluids. The principal source, optionally the sole source, of the acid is a solid acid-precursor, optionally injected with an additional solid that is inert and that masks a portion of the newly created fracture faces so that the fracture face etching by the acid is not uniform. The method ensures a good flow path for fluids between the fracture tip and the wellbore.

L'invention concerne un procédé de fracturation à l'acide d'une formation souterraine, permettant d'améliorer l'écoulement de fluides. La source principale, facultativement l'unique source, d'acide est un précurseur d'acide solide, facultativement injecté avec un autre solide inerte qui masque une partie des faces de fracture récemment formées, de sorte que l'attaque par l'acide de la face de fracture ne soit pas uniforme. Le procédé selon l'invention permet d'obtenir un bon trajet d'écoulement pour les fluides entre la pointe de la fracture et le puits de forage.

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