Acord 1-26 hot, dry well, Roosevelt Hot Springs hot dry rock prospect, Utah

Technical Report · Mon Aug 01 04:00:00 EDT 1983

DOI:https://doi.org/10.2172/5525212· OSTI ID:5525212

Shannon, Jr, S S; Pettitt, R; Rowley, J; Goff, F; Mathews, M; Jacobson, J J

The Acord 1-26 well is a hot, dry well peripheral to the Roosevelt Hot Springs known geothermal resource area (KGRA) in southwestern Utah. The bottom-hole temperature in this 3854-m-deep well is 230/sup 0/C, and the thermal gradient is 54/sup 0/C/km. The basal 685 m, comprised of biotite monzonite and quartz schist and gneiss, is a likely hot, dry rock (HDR) prospect. The hole was drilled in a structural low within the Milford Valley graben and is separated from the Roosevelt KGRA to the east by the Opal Mound Fault and other basin faults. An interpretation of seismic data approximates the subsurface structure around the well using the lithology in the Acord 1-26 well. The hole was drilled with a minimum of difficulty, and casing was set to 2411 m. From drilling and geophysical logs, it is deduced that the subsurface blocks of crystalline rock in the vicinity of the Acord 1-26 well are tight, dry, shallow, impermeable, and very hot. A hydraulic fracture test of the crystalline rocks below 3170 m is recommended. Various downhole tools and techniques could be tested in promising HDR regimes within the Acord 1-26 well.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5525212
• Report Number(s): LA-9857-HDR; ON: DE84002293
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150303 -- Geothermal Exploration & Exploration Technology-- Exploratory Drilling & Well Logging
150904* -- Geothermal Engineering-- Geothermal Reservoir & Well Performance
BIOTITE
COMMINUTION
ENERGY SYSTEMS
FEDERAL REGION VIII
FRACTURING
GEOLOGY
GEOTHERMAL GRADIENTS
GEOTHERMAL SYSTEMS
GEOTHERMAL WELLS
GNEISSES
Geothermal Legacy
HOT-DRY-ROCK SYSTEMS
HYDRAULIC FRACTURING
KGRA
LITHOLOGY
METAMORPHIC ROCKS
MICA
MINERALS
NORTH AMERICA
RESERVOIR TEMPERATURE
ROCKS
ROOSEVELT HOT SPRINGS
SCHISTS
SILICATE MINERALS
TEMPERATURE GRADIENTS
USA
UTAH
WELL LOGGING
WELL TEMPERATURE
WELLS