Code Modifications for Modeling Chemical Tracers and Embedded Natural Fractures at EGS Collab

Henry Johnston, Philip Winterfeld, Koenraad Beckers, Yu-Shu Wu

Research output: Contribution to conferencePaper


The EGS Collab SIGMA-V project is a multi-lab and university collaborative research project that is being undertaken at the Sanford Underground Research Facility (SURF) in South Dakota. The project consists of studying stimulation, fluid-flow, and heat transfer processes at a scale of 10-20 m, which is readily amenable to detailed characterization and monitoring. One objective of the project is to establish circulation from injector to producer by hydraulically fracturing the injector. Data generated during these experiments is to be compared with predictions from coupled thermal, hydrological, mechanical, and chemical simulators. One such a simulator, TOUGH2-CSM, has been enhanced in order to simulate EGS Collab SIGMA-V project experiments. These modifications include adding tracers, the capability to model tracer sorption, and an embedded fracture formulation. A set of example problems validate our conservative tracer transport and sorption formulations. We then simulated tracer transport and thermal breakthrough for the first EGS Collab SIGMA-V experiment.
Original languageAmerican English
Number of pages15
StatePublished - 2019
Event44th Workshop on Geothermal Reservoir Engineering - Stanford, California
Duration: 11 Feb 201913 Feb 2019


Conference44th Workshop on Geothermal Reservoir Engineering
CityStanford, California

NREL Publication Number

  • NREL/CP-5500-73214


  • EGS Collab
  • enhanced geothermal systems
  • natural fractures
  • reservoir simulation
  • Sanford Underground Research Facility
  • tracers


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