Software Users Manual (UM) for the FEHM Application



    This online version of the FEHM User’s Manual documents the use of the FEHM application. It is the most current description of FEHM and its use and is continually updated as code is developed.

    The following modeling and functional capabilities lists are additional to the FEHM UMV3.1 and are provided as an overview and command context for FEHM users.

    Overview of FEHM Capabilities

    • 3-dimensional complex geometries with unstructured grids
    • saturated and unsaturated media
    • simulation of production from gas hydrate reservoirs
    • simulation of geothermal reservoirs
    • non-isothermal, multi-phase flow of gas, water, oil
    • non-isothermal, multi-phase flow of air, water
    • non-isothermal, multi-phase flow of CO2, water
    • multiple chemically reactive and sorbing tracers
    • preconditioned conjugate gradient solution of coupled linear equations
    • fully implicit, fully coupled Newton Raphson solution of nonlinear equations
    • double porosity and double porosity/double permeability capabilities
    • control volume (CV) and finite element method (FE) methods
    • coupled geomechanics (THM) problems (fluid flow and heat transfer coupled with stress/deformation) including non-linear elastic and plastic deformation, nonlinear functional dependence of rock properties (e.g.permeability, porosity, Young’s modulus) on pressure, temperature and damage/stress

    FEHM Documentation

    Getting Started

    Program Specifications

    References & Support