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Title: Linking reaction, transport, and hydrological parameters inunsaturated fractured rock: toughreact implementation andapplication

Abstract

Modeling coupled water-gas-rock interactions in unsaturated fractured rock requires conceptual and numerical model considerations beyond those developed for saturated porous media. This paper focuses on the integration of the geological and hydrological parameters into the calculation of reactive-transport parameters and the feedback of mineral precipitation/dissolution to flow and transport. These basic relations have been implemented in the reactive transport code TOUGHREACT (Xu et al., 2003) that couples equilibrium and kinetic water-gas-rock inter-actions with multiphase flow and aqueous and gaseous species transport. Simulation results are presented illustrating the effects of water-rock interaction accompanying the heating of unsaturated heterogeneous fractured tuff. Unknowns associated with modeling water-rock interaction in fractured unsaturated systems are the area of the fracture surface that is wetted and which fractures are active components of the overall flow system. The wetted fracture area is important not only to water-rock interaction but to flow and transport between fluids flowing in fractures and the adjacent matrix. The other unknown relations are those describing permeability and capillary pressure modification during mineral precipitation and dissolution. Here we discuss solely the relations developed for fractures and the fracture-matrix interface.

Authors:
; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
923405
Report Number(s):
LBNL-60717
R&D Project: 0; BnR: YN0100000; TRN: US200804%%1108
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: TOUGH Symposium 2003, Berkeley, California, May2003
Country of Publication:
United States
Language:
English
Subject:
58; DISSOLUTION; FEEDBACK; FRACTURES; HEATING; IMPLEMENTATION; KINETICS; MODIFICATIONS; MULTIPHASE FLOW; PERMEABILITY; PRECIPITATION; SIMULATION; TRANSPORT; TUFF

Citation Formats

Sonnenthal, Eric, Spycher, Nicolas, and Xu, Tianfu. Linking reaction, transport, and hydrological parameters inunsaturated fractured rock: toughreact implementation andapplication. United States: N. p., 2003. Web.
Sonnenthal, Eric, Spycher, Nicolas, & Xu, Tianfu. Linking reaction, transport, and hydrological parameters inunsaturated fractured rock: toughreact implementation andapplication. United States.
Sonnenthal, Eric, Spycher, Nicolas, and Xu, Tianfu. Thu . "Linking reaction, transport, and hydrological parameters inunsaturated fractured rock: toughreact implementation andapplication". United States. https://www.osti.gov/servlets/purl/923405.
@article{osti_923405,
title = {Linking reaction, transport, and hydrological parameters inunsaturated fractured rock: toughreact implementation andapplication},
author = {Sonnenthal, Eric and Spycher, Nicolas and Xu, Tianfu},
abstractNote = {Modeling coupled water-gas-rock interactions in unsaturated fractured rock requires conceptual and numerical model considerations beyond those developed for saturated porous media. This paper focuses on the integration of the geological and hydrological parameters into the calculation of reactive-transport parameters and the feedback of mineral precipitation/dissolution to flow and transport. These basic relations have been implemented in the reactive transport code TOUGHREACT (Xu et al., 2003) that couples equilibrium and kinetic water-gas-rock inter-actions with multiphase flow and aqueous and gaseous species transport. Simulation results are presented illustrating the effects of water-rock interaction accompanying the heating of unsaturated heterogeneous fractured tuff. Unknowns associated with modeling water-rock interaction in fractured unsaturated systems are the area of the fracture surface that is wetted and which fractures are active components of the overall flow system. The wetted fracture area is important not only to water-rock interaction but to flow and transport between fluids flowing in fractures and the adjacent matrix. The other unknown relations are those describing permeability and capillary pressure modification during mineral precipitation and dissolution. Here we discuss solely the relations developed for fractures and the fracture-matrix interface.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {5}
}

Conference:
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