The injection of water into and extraction of vapour from bounded geothermal reservoirs

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Description

When liquid is injected into a geothermal reservoir, a fraction of the liquid may vaporise if the reservoir is sufficiently hot. The vapour forms at an approximately planar liquid-vapour interface and diffuses towards the far boundary of the reservoir. If vapour is extracted from the far boundary, then once the new vapour has diffused across the reservoir, the rate of production of vapour at the liquid-vapour interface approximately balances the rate of extraction. We find that if the pressure at the injection pump and extraction well is fixed, then the fraction of the liquid which vaporises and the rate of ... continued below

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141-146

Creation Information

Fitzgerald, Shaun D. & Woods, Andrew W. January 28, 1993.

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Description

When liquid is injected into a geothermal reservoir, a fraction of the liquid may vaporise if the reservoir is sufficiently hot. The vapour forms at an approximately planar liquid-vapour interface and diffuses towards the far boundary of the reservoir. If vapour is extracted from the far boundary, then once the new vapour has diffused across the reservoir, the rate of production of vapour at the liquid-vapour interface approximately balances the rate of extraction. We find that if the pressure at the injection pump and extraction well is fixed, then the fraction of the liquid which vaporises and the rate of extraction of vapour from the reservoir increase with time. However, the rate at which liquid is pumped into the reservoir inay initially decrease but subsequently increases with time, if a sufficient fraction of the liquid vaporises. If the mass flux of liquid injected into the reservoir is fixed, then again both the fraction of the liquid which vaporises and the mass flux of vapour which may be extracted increase with time. In this case, the pressure at the injection pump may increase but subsequently decreases with time, again if a sufficient fraction of the liquid vaporises.

Physical Description

141-146

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Source

  • Proceedings, eighteenth workshop on geothermal reservoir engineering, Stanford University, Stanford, CA, January 26-28, 1993

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Identifier

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  • Report No.: SGP-TR-145-20
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 888915
  • Archival Resource Key: ark:/67531/metadc885362

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 28, 1993

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

Description Last Updated

  • Dec. 5, 2016, 9:22 p.m.

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Fitzgerald, Shaun D. & Woods, Andrew W. The injection of water into and extraction of vapour from bounded geothermal reservoirs, article, January 28, 1993; United States. (digital.library.unt.edu/ark:/67531/metadc885362/: accessed January 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.