Perforation strategy for heterogeneous proppant placement in...

E - Fixed Constructions – 21 – B

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E21B 43/11 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2689433

A method of hydraulic fracturing an individual reservoir fracturing layer of a subterranean formation to produce heterogeneous proppant placement is given in which pillars of proppant are placed such that the pillars do not extend the entire height of the fracture (for a vertical fracture) but are themselves interrupted by channels so that the channels between the pillars form pathways that lead to the wellbore. The method combines methods of introducing slugs of proppant- carrying and proppant- free fluids through multiple clusters of perforations within a single fracturing layer of rock, with methods of ensuring that the slugs exiting the individual clusters do not merge.

La présente invention concerne un procédé de fracturation hydraulique d'une couche de fracturation de réservoir individuelle d'une formation souterraine pour produire un positionnement d'agent de soutènement hétérogène dans lequel des piliers d'agent de soutènement sont placés de sorte que les piliers ne s'étendent pas sur la hauteur entière de la fracture (pour une fracture verticale) mais soient eux-mêmes interrompus par des canaux de sorte que les canaux entre les piliers forment des voies de passage qui conduisent au forage. Le procédé associe des procédés qui consistent à introduire des cartouches de fluides de transport d'agent de soutènement et de fluides dépourvus d'agent de soutènement à travers de multiples groupes de perforations au sein d'une couche de fracturation unique de roche, avec des procédés qui consistent à s'assurer que les cartouches qui sortent du groupe individuel ne fusionnent pas.

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