Compressional and shear wave velocities in water filled rocks during water-steam transition

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Both compressional and shear wave velocities were measured in water-filled Berea sandstone as a function of pore pressure under a constant confining pressure of 200 bar. At 145.5 C, compressional velocity increased from steam-saturated (low pore pressure) to water-saturated (high pore pressure) rock, whereas shear wave velocity decreased. Furthermore, a velocity minimum, attenuation and dispersions occur at water-steam transition for compressional wave. Results at 198 C show that both compressional and shear velocities decrease from steam-saturated to water-saturated rock, and a small velocity minimum is observed for compressional waves, but no attenuation nor dispersion occur. At both temperatures, the V{sub … continued below

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pages 84-95

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Hisao, Ito; DeVilbiss, John & Nur, Amos January 1, 1978.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 112 times. More information about this article can be viewed below.

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Both compressional and shear wave velocities were measured in water-filled Berea sandstone as a function of pore pressure under a constant confining pressure of 200 bar. At 145.5 C, compressional velocity increased from steam-saturated (low pore pressure) to water-saturated (high pore pressure) rock, whereas shear wave velocity decreased. Furthermore, a velocity minimum, attenuation and dispersions occur at water-steam transition for compressional wave. Results at 198 C show that both compressional and shear velocities decrease from steam-saturated to water-saturated rock, and a small velocity minimum is observed for compressional waves, but no attenuation nor dispersion occur. At both temperatures, the V{sub p}/V{sub s} ratio and Poisson's ratio increased from steam-saturated to water-saturated rock. The results are reasonably compatible with the mechanical effects of mixing steam and water fin the pore space near the phase transition, and may be applicable to in situ geothermal field evaluation.

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pages 84-95

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  • Proceedings fourth workshop geothermal reservoir engineering, Stanford, CA, December 13-15, 1978

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  • Report No.: SGP-TR-30
  • Report No.: CONF-781222-12
  • Office of Scientific & Technical Information Report Number: 892146
  • Archival Resource Key: ark:/67531/metadc874445

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1978

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  • Sept. 21, 2016, 2:29 a.m.

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  • June 3, 2019, 3:03 p.m.

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Hisao, Ito; DeVilbiss, John & Nur, Amos. Compressional and shear wave velocities in water filled rocks during water-steam transition, article, January 1, 1978; United States. (https://digital.library.unt.edu/ark:/67531/metadc874445/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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