Geothermal reservoir assessment based on slim hole drilling, volume 1 : analytical method Hawaii Natural Energy Institute, University of Hawaii at Manoa Olson, Harry J. GeothermEx, Inc. 2011-07-26T00:49:56Z 2011-09-29T20:10:58Z 2011-07-26T00:49:56Z 2011-09-29T20:10:58Z 1993
dc.description.abstract The Hawaii Scientific Observation Hole (SOH) program was planned, funded, and initiated in 1988 by the Hawaii Natural Energy Institute, an institute within the School of Ocean and Earth Science and Technology, at the University of Hawaii at Manoa. Initial funding for the SOH program was $3.25 million supplied by the State of Hawaii to drill six, 4,000 foot scientific observation holes on Maui and the Big Island of Hawaii to confirm and stimulate geothermal resource development in Hawaii. After a lengthy permitting process, three SOHs, totaling 18,890 feet of mostly core drilling were finally drilled along the Kilauea East Rift Zone (KERZ) in the Puna district on the Big Island. The SOH program was highly successful in meeting the highly restrictive permitting conditions imposed on the program, and in developing slim hole drilling techniques, establishing subsurface geological conditions, and initiating an assessment and characterization of the geothermal resources potential of Hawaii - even though permitting specifically prohibited pumping or flowing the holes to obtain data of subsurface fluid conditions. The first hole, SOH-4, reached a depth of 2,000 meters, recorded a bottom hole temperature of 306.1°C, and established subsurface thermal continuity along the KERZ between the HGP-A and the True/Mid-Pacific Geothermal Venture wells. Although evidence of fossil reservoir conditions were encountered, no zones with obvious reservoir potential were found. The second hole SOH-1, was drilled to a depth of 1,684 meters, recorded a bottom hole temperature of 206.1°C, effectively doubled the size of the Hawaii Geothermal Project - Abbott/Puna Geothermal Venture (HGP-A/PGV) proven/probable reservoir, and defined the northern limit of the HGP-A/PGV reservoir. The final hole, SOH-2, was drilled to a depth of 2,073 meters, recorded a bottom hole temperature of 350.5°C, and has sufficient indicated permeability to be designated as a potential “discovery”.
dc.description.sponsorship Prepared for State of Hawaii, Department of Business, Economic Development & Tourism and Electric Power Research Institute
dc.format.extent various pagings
dc.identifier.citation Hawaii Natural Energy Institute, Olson HJ, GeothermEx, Inc. 1993. Geothermal Reservoir Assessment Based on Slim Hole Drilling, Volume 1: Analytical Method. Palo Alto (CA): Electric Power Research Institute, Inc. EPRI TR-103399-V1, Project 1994-04.
dc.language.iso en-US
dc.publisher Electric Power Research Institute, Inc.
dc.relation.ispartofseries EPRI TR-103399-V1, Project 1994-04
dc.subject geothermal resource assessments
dc.subject Scientific Observation Hole
dc.subject SOH
dc.subject.lcsh Underground reservoirs--Hawaii--Puna Region
dc.title Geothermal reservoir assessment based on slim hole drilling, volume 1 : analytical method
dc.type Report
dc.type.dcmi Text
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