Liquified petroleum gas fracturing system

Details Liquified petroleum gas fracturing system Liquified petroleum gas fracturing system

E - Fixed Constructions

21

B

E21B 43/267 (2006.01)

Patent

CA 2644027

A fracturing system for a well, in which a stream of LPG, a mixture of propane and butane, is injected into the well at frac pressure. Proppant is supplied into the LPG stream, and carried by the LPG mix into the formation. Inert gas such as nitrogen is used for purging system components of LPG, and to help protect against risk of explosion. Nitrogen may also be added to the LPG mix during a frac of shale gas or coal gas formations.

La présente invention porte sur un système de fracturation pour un puits, dans lequel un flux de GPL, un mélange de propane et de butane, est injecté dans le puits à une pression de fracturation. Un agent de soutènement est envoyé dans le flux de GPL et transporté par le mélange de GPL dans la formation. Un gaz inerte tel que l'azote est utilisé pour purger les éléments du système du GPL et pour assurer une protection contre les risques d'explosion. L'azote peut également être ajouté au mélange de GPL pendant la fracturation d'une formation de gaz de schiste ou de gaz de houille.

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