LASL Hot Dry Rock Geothermal Project. Progress report, July 1, 1975--June 30, 1976
- comps.
Successful drilling into hard crystalline rock was accomplished to depths of about 3 km. Hydraulic fractures in the crystalline rock with radii as large as 150 m were produced. Values of in situ permeability of the Fenton Hill granite were measured. Directional drilling at depths of up to 3 km was accomplished. At least 90 to 95 percent of water injected into fractured regions was recovered. A connection was established between two deep boreholes through a fractured region of hot granite for the first time. Instruments were developed to operate for several hours under the downhole conditions. The compressional and shear components of seismic signals produced by fracture extension and inflation were detected downholes. Acoustic ranging has generally identified the relative positions of two boreholes at several depths. Self-potential and induced potential techniques have determined vertical fracture lengths at the borehole. Pressure-flow and fluid residence time distribution studies have measured properties of the downhole system. Core sample studies have provided physical and chemical data. Techniques were developed to examine reservoir performance. A geothermal power-production model was formulated. (MHR)
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 7237793
- Report Number(s):
- LA-6525-PR
- Country of Publication:
- United States
- Language:
- English
Similar Records
Directional drilling operations Hot Dry Rock well EE-2
Los Alamos Scientific Laboratory dry hot rock geothermal project (LASL Group Q-22)
Related Subjects
BOREHOLES
WELL LOGGING
GRANITES
PERMEABILITY
HOT-DRY-ROCK SYSTEMS
HYDRAULIC FRACTURING
RESEARCH PROGRAMS
JEMEZ MOUNTAINS
MEASURING INSTRUMENTS
SEISMIC SURVEYS
WELL DRILLING
CAVITIES
COMMINUTION
DRILLING
FRACTURING
GEOPHYSICAL SURVEYS
GEOTHERMAL SYSTEMS
IGNEOUS ROCKS
MOUNTAINS
NEW MEXICO
NORTH AMERICA
ROCKS
SOUTHWEST REGION
USA
Geothermal Legacy
150906* - Geothermal Engineering- Reservoir Stimulation & Extraction Technology
150303 - Geothermal Exploration & Exploration Technology- Exploratory Drilling & Well Logging