Tuesday, November 1, 2016

Science & Technology: A Method for Stimulating a Sub-Commercial Geothermal Well

Method and apparatus for stimulating a geothermal well (United States Patent and Trademark Office)

Date of patent: 1 November, 2016

A method for stimulating a sub-commercial geothermal well includes steps of drilling a stimulating well; isolating a corresponding zone in the stimulating well using vertically spaced swell packers that are swellable when contacted by subterraneously heated geothermal brine present in the stimulating well and are resistant to the high temperature of the brine; injecting stimulating fluid into the stimulating well such that it will flow only through a zone of the well that is not isolated; and allowing the stimulating fluid to exit the well from a non-isolated zone located at a desired depth into a surrounding geological formation. The fracture or system of fractures within the formation is thereby hydraulically reopened.

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