Fracturing of subterranean formations

E - Fixed Constructions – 21 – B

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E21B 43/26 (2006.01)

Patent

CA 2550340

Fracturing of a subterranean formation may be achieved using hydrogel. The gel is formed from a gel . precursor formulation which comprises an aqueous formulation of poly (1,4-di(4-(N~methylpyridinyl)) -2, 3-di(4-(l-formylphenyl) butylidene), poly (vinyl alcohol) and a suitable proppant, in the presence of an acid catalyst. The gel may be prepared at the surface with a viscosity of greater than (200) cp measured at (100)s-1 and then injected into the subterranean formation under high pressure to fracture the formation.

La fracturation d'une formation souterraine peut être réalisée à l'aide d'un hydrogel. Ce gel est formé à partir d'une formulation de précurseur gel qui contient une formulation aqueuse de poly (1,4-di(4-(N-méthylpyridinyl)) -2, 3-di(4-(l-formylphényl) butylidène), alcool (poly) vinylique et un agent de soutènement adéquat, en présence d'un catalyseur acide. Ce gel peut être préparé à la surface avec une viscosité de plus de (200) cp mesurée à (100)s?-1¿ et puis injecté dans la formation souterraine à haute pression pour fracturer la formation.

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