A Summary of Geothermal Exploration and Data from Stratigraphic Test Well No. 1 Makushin Volcano, Unalaska Island

Conference · Thu Dec 15 04:00:00 EST 1983

OSTI ID:889582

Campbell, Don A; Economides, Michael J

Geothermal resource investigations have been conducted for the past four years on Unalaska Island in the Aleutian Chain. The focus of the work has been Makushin Volcano, about 12 miles from the cities of Unalaska and Dutch Harbor. In the summer of 1982, three widely spaced deep temperature gradient holes were drilled which encountered high temperatures. During the summer of 1983, a three inch diameter "slim hole" well, ST-1, was drilled to 1,949 feet. A shallow, low pressure, steam zone and a relatively productive hot water zone at total depth were encountered. The lower zone produced 47,000 lb/hr, limited by reaching critical mass velocity at the orifice. The static bottomhole pressure and temperature were 478 psig and 379{degrees}F, respectively. Analysis of transient pressure and flow data yielded a productivity inex of 3,470 lb/hr/psi and a permeability-thickness of 50,900 md-ft for the three-foot (at the wellbore) lower zone fracture. A preliminary reservoir/wellbore flow evaluation for a possible power plant indicates two commercial-size wells could fuel a 10 megawatt facility.

• Research Organization: Republic Geothermal, Inc., Santa Fe Springs, CA; University of Alaska, Fairbanks, AK
• Sponsoring Organization: USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AT03-80SF11459
• OSTI ID: 889582
• Report Number(s): SGP-TR-74-19
• Country of Publication: United States
• Language: English

Related Subjects

Geothermal Legacy