Compositions and methods for controlling unconsolidated...

E - Fixed Constructions – 21 – B

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E21B 43/26 (2006.01) E21B 33/138 (2006.01)

Patent

CA 2558055

The present invention relates to methods for stabilizing an unconsolidated or weakly consolidated zone of a subterranean formation. One embodiment provides a method of stabilizing a subterranean formation comprising the steps of placing a gelable liquid composition into the subterranean formation, wherein the gelable liquid composition is capable of forming a gelled substance after placement; and, allowing the gelable liquid composition to convert into a gelled substance that stabilizes unconsolidated or weakly consolidated particles within the subterranean formation. Another embodiment provides a method of stimulating production from a subterranean formation comprising the steps of placing a gelable liquid composition into the subterranean formation; allowing the gelable liquid composition to convert into a gelled substance; creating at least one fracture in the subterranean formation extending from the well bore, through the gelled substance, and into an untreated zone of the subterranean formation; depositing proppant into at least one such fracture.

La présente invention a trait à des procédés pour la stabilisation d'une zone non consolidée ou peu consolidée d'une formation souterraine. Un mode de réalisation de l'invention a trait à un procédé de stabilisation d'une formation souterraine, comprenant le placement d'une composition liquide gélifiable apte à la gélification dans la formation souterraine, la composition liquide gélifiable étant capable de former une substance gélifiée suite à son placement ; et la conversion de la composition liquide gélifiable en une substance gélifiée qui assure la stabilisation des particules non consolidées ou peu consolidées dans la formation souterraine. Un autre mode de réalisation a trait à un procédé de stimulation de production à partir d'une formation souterraine comprenant les étapes suivantes : le placement de la composition liquide gélifiable dans la formation souterraine ; la conversion de la composition liquide gélifiable en une substance gélifiée ; la création d'au moins une fracture dans la formation souterraine s'étendant à partir du trou de forage, à travers la substance gélifiée, et dans la zone non traitée de la formation souterraine ; le dépôt d'agent de soutènement dans au moins une telle fracture.

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