High proppant concentration/high co2 ratio fracturing system

Details High proppant concentration/high co2 ratio fracturing system High proppant concentration/high co2 ratio fracturing system

E - Fixed Constructions

21

B

E21B 43/267 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2129613

There is described 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 fracturing fluid, introducing proppants into the second stream for transport therein, and admixing the first and second streams to form an emulsion for injection into the formation at a rate and pressure to cause the fracturing thereof.

l s'agit 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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