Inverse modeling of a multistep outflow experiment fordetermining hysteretic hydraulic properties

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Description

A new, closed-form hysteretic model of the capillary pressure-saturation and relative permeability-saturation relationship has been implemented into ITOUGH2. The hysteretic capillary pressure function is based on the van Genuchten model, with a modified version of the dependent domain model of Mualem to describe the scanning curves. Hysteresis in the relative permeability relations is considered to be mainly a result of nonwetting fluid entrap- ment. The hysteresis model was used in combination with inverse modeling techniques to examine the potential of a simple drainage- imbibition experiment to determine hysteretic hydraulic properties.

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7 pages

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Faybishenko, B.; Finsterle, S. & Sonnenborg, T.O. May 1, 1998.

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Description

A new, closed-form hysteretic model of the capillary pressure-saturation and relative permeability-saturation relationship has been implemented into ITOUGH2. The hysteretic capillary pressure function is based on the van Genuchten model, with a modified version of the dependent domain model of Mualem to describe the scanning curves. Hysteresis in the relative permeability relations is considered to be mainly a result of nonwetting fluid entrap- ment. The hysteresis model was used in combination with inverse modeling techniques to examine the potential of a simple drainage- imbibition experiment to determine hysteretic hydraulic properties.

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7 pages

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  • TOUGH Workshop '98, Berkeley, CA, May 4-6, 1998

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  • Other: DE00006406
  • Report No.: LBNL--41749
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 6406
  • Archival Resource Key: ark:/67531/metadc690154

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Office of Scientific & Technical Information Technical Reports

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  • May 1, 1998

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Aug. 30, 2016, 7:03 p.m.

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Faybishenko, B.; Finsterle, S. & Sonnenborg, T.O. Inverse modeling of a multistep outflow experiment fordetermining hysteretic hydraulic properties, article, May 1, 1998; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc690154/: accessed August 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.