TOUGHREACT is a numerical simulation program for chemically reactive non-isothermal flows of multiphase fluids in porous and fractured media. The program is written in Fortran 77 and was developed by introducing reactive chemistry into the multiphase flow code TOUGH2 V2. Interactions between mineral assemblages and fluids can occur under local equilibrium or kinetic rates. The gas phase can be chemically active. Precipitation and dissolution reactions can change formation porosity and permeability, and can also modify the unsaturated flow properties of the rock.

The code is distributed with a comprehensive user’s guide that includes sample problems addressing geothermal reservoirs and hydrothermal systems, nuclear waste isolation, groundwater quality, sequestration of carbon dioxide in saline aquifers, and supergene copper enrichment. Code installation instructions are available in a READ.ME file.

The source code for TOUGHREACT is available from the Energy Science and Technology Software Center (ESTSC) of the U.S. Department of Energy. Click here to download an Acrobat pdf-file prepared by ESTSC with licensing information. The LBNL group, led by Tianfu Xu, serves as custodians of the code, and provides limited technical support.