Oregon

U.S. Geothermal Inc., Boise, Idaho, launched two development drilling programs at its Neal Hot Springs geothermal project in northern Malheur County, Ore.

By OGJ editors
HOUSTON, Sept. 23
– U.S. Geothermal Inc., Boise, Idaho, launched two development drilling programs at its Neal Hot Springs geothermal project in northern Malheur County, Ore.

Well NHS-5, drilling at 300 ft, is expected to encounter a large-aperture fracture at 2,800 ft that contains geothermal fluid. As many as three large-diameter wells are planned to 2,300-3,800 ft.

A temperature gradient program of drilling up to nine small-diameter, 500-ft wells began in early September.

Ultimate goal is to define a geothermal reservoir needed to construct a 22-Mw power plant.

NHS-1, Neal’s first production well, flowed under artesian pressure at a rate of 2,315 gal/min with a flowing production temperature of 286.5° F. in June 2008.

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