Reactive geothermal transport simulation to study the formation mechanism of impermeable barrier between acidic and neutral fluid zones in the Onikobe Geothermal Field, Japan

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Description

Two types of fluids are encountered in the Onikobe geothermal reservoir, one is neutral and the other is acidic (pH=3). It is hypothesized that acidic fluid might be upwelling along a fault zone and that an impermeable barrier might be present between the acidic and neutral fluid zones. We carried out reactive geothermal transport simulations using TOUGHREACT (Xu and Pruess, 1998 and 2001) to test such a conceptual model. Mn-rich smectite precipitated near the mixing front and is likely to form an impermeable barrier between regions with acidic and neutral fluids.

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Todaka, Norifumi; Akasaka, Chitosi; Xu, Tianfu & Pruess, Karsten March 9, 2003.

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Description

Two types of fluids are encountered in the Onikobe geothermal reservoir, one is neutral and the other is acidic (pH=3). It is hypothesized that acidic fluid might be upwelling along a fault zone and that an impermeable barrier might be present between the acidic and neutral fluid zones. We carried out reactive geothermal transport simulations using TOUGHREACT (Xu and Pruess, 1998 and 2001) to test such a conceptual model. Mn-rich smectite precipitated near the mixing front and is likely to form an impermeable barrier between regions with acidic and neutral fluids.

Physical Description

vp.; OS: Window 2000

Notes

OSTI as DE00813581

"This work was supported partly by a project provided Electric Power Development Co., Ltd. (Japan), and partly by the Assistant Secretary for Energy Efficiency and Renewable Energy , Office of Wind and Geothermal Technologies, of the U.S. Department of Energy, under contract No. DE-AC03-76SF00098."

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  • Other Information: PBD: 9 Apr 2003

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  • Report No.: LBNL--52493
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/813581 | External Link
  • Office of Scientific & Technical Information Report Number: 813581
  • Archival Resource Key: ark:/67531/metadc737574

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  • March 9, 2003

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • April 4, 2016, 2:14 p.m.

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Todaka, Norifumi; Akasaka, Chitosi; Xu, Tianfu & Pruess, Karsten. Reactive geothermal transport simulation to study the formation mechanism of impermeable barrier between acidic and neutral fluid zones in the Onikobe Geothermal Field, Japan, report, March 9, 2003; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc737574/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.