Interpretation of the pressure and flow data for the two fractures of the Los Alamos hot dry rock (HDR) geothermal system

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Since the initial hydraulic fractures were established at the Fenton Hill site of the Los Alamos HDR project, several pressurization and flow experiments have been performed. The fractures are in granite at a depth of approximately 2900 meters and are separated by approximately 30 meters. The flow experiments were planned to establish the water losses to the surrounding rock, determine pressure and stress dependent rock properties, and to characterize the fracture system in terms of extent, volume, and the interconnection between the fractures. Here, an analysis of these experiments is presented in terms of a mathematical model that includes the ... continued below

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Pages: 23

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Fisher, H. N. January 1, 1977.

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Description

Since the initial hydraulic fractures were established at the Fenton Hill site of the Los Alamos HDR project, several pressurization and flow experiments have been performed. The fractures are in granite at a depth of approximately 2900 meters and are separated by approximately 30 meters. The flow experiments were planned to establish the water losses to the surrounding rock, determine pressure and stress dependent rock properties, and to characterize the fracture system in terms of extent, volume, and the interconnection between the fractures. Here, an analysis of these experiments is presented in terms of a mathematical model that includes the variable rock permeability and porosity, the connection between permeability and porosity as given by simple models, and the effects of the earth stresses. These features are incorporated into the diffusion equation for the pore pressure. The experimental relationship of pressure and flow in the two fractures is examined.

Physical Description

Pages: 23

Notes

Dep. NTIS, PC A02/MF A01.

Source

  • 18. symposium on rock mechanics: rock mechanics in geothermal development, Keystone, CO, USA, 22 Jun 1977

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  • Report No.: LA-UR-77-772
  • Report No.: CONF-770628-1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 7255727
  • Archival Resource Key: ark:/67531/metadc1443878

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1977

Added to The UNT Digital Library

  • Feb. 10, 2019, 8:45 p.m.

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  • Feb. 25, 2019, 5:15 p.m.

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Fisher, H. N. Interpretation of the pressure and flow data for the two fractures of the Los Alamos hot dry rock (HDR) geothermal system, article, January 1, 1977; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1443878/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.