Earth Sciences Division (ESD) Department of Energy (DOE) Lawrence Berkeley National Laboratory (LBNL)
GeoT graph
GeoT Illustration

GeoT: A Computer Program for Multicomponent Geothermometry and Geochemical Speciation

Program GeoT FlowchartGeoT implements the multicomponent geothermometry method developed by Reed and Spycher (1984, Geochim. Cosmichim. Acta 46 513–528) into a stand-alone computer program, to ease the application of this method and to improve the prediction of geothermal reservoir temperatures using full and integrated chemical analyses of geothermal fluids.  Reservoir temperatures are estimated from statistical analyses of mineral saturation indices computed as a function of temperature. The reconstruction of the deep geothermal fluid compositions, and geothermometry computations, are all implemented into the same computer program, allowing unknown or poorly constrained input parameters to be estimated by numerical optimization using existing parameter estimation software, such as iTOUGH2, PEST , or UCODE . This integrated geothermometry approach presents advantages over classical geothermometers for fluids that have not fully equilibrated with reservoir minerals and/or that have been subject to processes such as dilution and gas loss.

GeoT Photo

Ordering Information

GeoT  »  Register and Download
Commercial Non-Commercial, Academic U.S. Government, Collaborator
GeoT Standard
Multicomponent aqueous geochemical speciation and chemical geothermometry with deep fluid reconstruction. Up to 100 waters can be processed at the same time.
GeoT User's Guide (pdf).
$750** $200 No Charge
GeoT Limited
Same functionality as the Standard version, but only two waters can be processed at the same time.
GeoT User's Guide (pdf).
$150 No Charge No Charge

* Each package includes executables for PC 32-bit/64-bit, Linux/Unix, and Mac OSX (command-line executables). Other platforms available upon request.

** $650 if upgrading from the limited version

License Information

License Type Distribution Comment License Agreement
Academic These are appropriate for individuals working in academic or not-for-profit research institutions who are using the software for strictly non-commercial purposes. Academic licenses are Department Licenses i.e., the code may only be used by individuals working in the department to which the software was licensed. Academic License Agreement: Executable Code
Commercial These are appropriate for commercial entities. Commercial licenses are Enterprise-wide Licenses. Commercial License Agreement: Executable Code
Government U.S. Government organizations are required to sign a no-cost government use license to obtain a copy of the software. Non-U.S. Government organizations are required to obtain an Academic license. Government License Agreement: Executable Code
Collaborator Certain modules may be distributed at no cost to Academic or Commercial Collaborators identified by the GeoT Developer Team.
Collaborator License Agreement: Executable Code


The development of GeoT was supported by the U.S. Department of Energy, Geothermal Technologies Program, Energy Efficiency and Renewable Energy Office