Alternate operating strategies for Hot Dry Rock geothermal reservoirs

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Flow testing and heat extraction experiments in prototype Hot Dry Rock (HDR) geothermal reservoirs have uncovered several challenges which must be addressed before commercialization of the technology is possible. Foremost among these is the creation of a reservoir which simultaneously possesses high permeability pathways and a large volume of fractured rock. The current concept of heat extraction -- a steady state circulation system with fluid pumping from the injection well to a single, low pressure production well -- may limit our ability to create heat extraction systems which meet these goals. A single injection well feeding two production wells producing ... continued below

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Medium: P; Size: Pages: (8 p)

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Robinson, B.A. January 1, 1991.

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Description

Flow testing and heat extraction experiments in prototype Hot Dry Rock (HDR) geothermal reservoirs have uncovered several challenges which must be addressed before commercialization of the technology is possible. Foremost among these is the creation of a reservoir which simultaneously possesses high permeability pathways and a large volume of fractured rock. The current concept of heat extraction -- a steady state circulation system with fluid pumping from the injection well to a single, low pressure production well -- may limit our ability to create heat extraction systems which meet these goals. A single injection well feeding two production wells producing fluid at moderate pressures is shown to be a potentially superior way to extract heat. Cyclic production is also demonstrated to have potential as a method for sweeping fluid through a larger volume of rock, thereby inhibiting flow channeling and increasing reservoir lifetime. 10 refs., 4 figs., 2 tabs.

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Medium: P; Size: Pages: (8 p)

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OSTI; NTIS; GPO Dep.

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  • Annual meeting of the Geothermal Resources Council and exhibit, San Diego, CA (United States), 6-9 Oct 1991

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  • Other: DE91014778
  • Report No.: LA-UR-91-1867
  • Report No.: CONF-911074--3
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5526687
  • Archival Resource Key: ark:/67531/metadc1093834

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1991

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  • Feb. 10, 2018, 10:06 p.m.

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  • May 21, 2018, 3:43 p.m.

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Robinson, B.A. Alternate operating strategies for Hot Dry Rock geothermal reservoirs, article, January 1, 1991; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1093834/: accessed November 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.