Adsorption characteristics of rocks from vapor-dominated geothermal reservoir at the Geysers, CA

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This paper reports on a continuing experimental effort to characterize the adsorption behavior of rocks from The Geysers steam field in California. We show adsorption results obtained for 36 rock samples. All of the adsorption isotherms plotted on the same graph exhibit an envelope of isotherms. The minimum and the maximum values of the slope (or rate of adsorption) and of the magnitude within this envelope of isotherms belonged to the UOC-1 (felsite) and NCPA B-5 (serpentine) samples. The values of surface area and porosity, and pore size distribution for 19 of the samples indicated a very weak correlation with ... continued below

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469-479

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Satik, Cengiz; Walters, Mark & Horne, Roland N. January 24, 1996.

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Description

This paper reports on a continuing experimental effort to characterize the adsorption behavior of rocks from The Geysers steam field in California. We show adsorption results obtained for 36 rock samples. All of the adsorption isotherms plotted on the same graph exhibit an envelope of isotherms. The minimum and the maximum values of the slope (or rate of adsorption) and of the magnitude within this envelope of isotherms belonged to the UOC-1 (felsite) and NCPA B-5 (serpentine) samples. The values of surface area and porosity, and pore size distribution for 19 of the samples indicated a very weak correlation with adsorption. An interpretation of the pore size distributions and the liquid saturation isotherms suggests that the change in the slope and the magnitude of the adsorption isotherms within the envelope is controlled primarily by the physical adsorption mechanism instead of capillary condensation. Grain-size and framework grain to matrix ratio are found to be insufficient to characterize this adsorption behavior. An accurate identification of the mineralogy of the samples will be essential to complete this analysis.

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469-479

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  • Proceedings, Twenty-First Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, CA, January 22-24, 1996

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  • Report No.: SGP-TR-151-64
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 889860
  • Archival Resource Key: ark:/67531/metadc884718

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  • January 24, 1996

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 22, 2016, 3:55 p.m.

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Satik, Cengiz; Walters, Mark & Horne, Roland N. Adsorption characteristics of rocks from vapor-dominated geothermal reservoir at the Geysers, CA, article, January 24, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc884718/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.