Nitrogen/carbon dioxide combination fracture treatment

E - Fixed Constructions – 21 – B

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Details

E21B 43/267 (2006.01) C09K 8/62 (2006.01) C09K 8/80 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2135719

There is provided an apparatus and a method of fracturing an underground formation penetrated by a well bore comprising the steps of forming a first pressurized stream of liquified gas, introducing proppants into the first stream for transport of the proppants in the first stream, pressurizing and cooling the proppants to substantially the storage pressure and temperature of the liquified gas prior to introducing the proppants into the first stream, forming a second pressurized stream of gas and admixing the first and second streams to form a fracturing fluid for injection into the formation at a rate and pressure to cause the fracturing thereof.

Il s'agit d'un dispositif et d'une méthode de fracturation d'une formation souterraine pénétrée par un puits de forage qui comprend les étapes suivantes : former un premier jet de gaz liquéfié sous pression, introduire des agents de soutènement dans le premier jet pour les y transporter, mettre en pression et refroidir pour qu'ils aient substantiellement la pression et la température d'entreposage du gaz liquéfié avant de les introduire dans le premier jet, former un deuxième jet de fluides de fracturation sous pression, introduire des agents de soutènement dans le deuxième jet pour les y transporter et mélanger les deux jets pour former une émulsion qui sera injectée dans la formation au débit et à la pression nécessaires pour causer la fracturation voulue.

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