Patent ID: 7753122
Filing Date: 2010-07-13
Classification: E21B,F24T,Y02E

Abstract:
1. A method of extracting thermal energy from a rock formation, the method comprising the steps of: drilling a plurality of wells to a depth sufficient to allow development of at least one fracture joint cloud reservoir; hydraulically fracturing at least one of the plurality of wells; dilating the at least one fracture joint cloud reservoir; forcing cooled water under high pressure and volume into at least one of the plurality of wells to charge the at least one fracture joint cloud reservoir; alternately opening and closing a plurality of discharge control valves and a plurality of injection control valves to provide a continuous production rate from the plurality of wells and permit discharge from the at least one fracture joint cloud reservoir; removing heated water from at least one of the plurality of wells; and passing the heated water to a heat exchanger.