GOHFER® is a multi-disciplinary, integrated geomechanical fracture simulator that incorporates all the tools necessary for conventional and unconventional well completion design, analysis and optimization.  GOHFER, which stands for Grid Oriented Hydraulic Fracture Extension Replicator, is a planar 3-D geometry fracture simulator with a fully coupled fluid/solid transport simulator.  GOHFER has been continually developed and refined by Dr. Robert D. Barree & Barree & Associates LLC for almost 40 years.

GOHFER is separated into 5 modules that may be purchased or leased independently which allows you to customize your GOHFER package to your needs.  Select a module below to learn more. 

  • Petrophysical Analysis 
    • Petrophysical Analysis - Comprehensive petrophysical analysis package with built-in synthetic correlations for mechanical rock properties and gas identification.  QC or replace poor or absent sonic data and ability to incorporate core data.

  • Fracture Simulation & Production 
    • Fracture Simulation & Production – Finite difference gridded solution assuming shear/slip fracture geometry (not linear elastic). Vertical and horizontal anisotropy, spatially variable leakoff and limited entry design/multiple simultaneous fracture initiation sites. Handles impact of secondary fracture systems on fluid leakoff/proppant transport and geometry.  3D Complex horizontal fracture modeling - longitudinal and transverse components. Variable inter/intra-stage fracture stress shadow interference factor. Multi-stage/multi-cluster modeling capability for plug & perf or ball drop simulations. Fracture orientation determined by stress azimuth, independent of well direction.

      GOHFER Production handles cleanup, multiphase non-Darcy flow and stress (proppant crushing) based on 30 years of Stimlab Inc. research. Handles production interference of multiple transverse fractures and allows for optimization of fracture spacing in unconventional reservoir development.

  • Pressure Diagnostics
    • Pressure Diagnostics - Complete pressure diagnostic analysis package including step rate and blowdown analysis; fracture closure analysis and determination and effects of primary leakoff mechanism; after closure analysis for pore pressure and permeability.  Also includes a permeability estimation from G function analysis.

  • Production Analysis
    • Production Analysis - Uses actual production data to analyze post-frac performance and assess stimulation effectiveness. Includes rate transient type-curve analysis, decline curve analysis, production forecasting to ultimate recovery, and flow regime identification. Determines fracture spacing and effective well spacing for horizontal wells, along with the fraction of the lateral producing.

  • Real Time

    • Real-Time - Direct importation of streaming or internet real time data with real time pressure diagnostic analysis, fracture simulation and calculated bottomhole pressure.

GOHFER 3D is leading the industry into the future with the most current research and technology while challenging outdated philosophies and paradigms giving you more confidence and predictability in your completion strategy. GOHFER’s formulation has been used extensively and successfully in all regions globally in all types of reservoirs and does not require a special module for individual environments.  GOHFER’s timely technical support and comprehensive software documentation is unparalleled in the industry.   

  • GOHFER 3D can handle multiple wells, including vertical and horizontal in the same model
  • Multi-layer completions, zipper fracs and offset depletion effects
  • Full 3D geo-mechanical earth model input or optional input of 2D surface map with digital reference well log data
  • Variable inter/intra-stage fracture stress shadow interference between each fracture and stage on each well
  • Wellbore breakdown gradient and angle & breakdown pressure and orientation calculations
  • Geosteering of laterals and engineered completions
  • Models both the longitudinal and transverse fracture components
  • Pressure diagnostic analysis, production forecasting and rate transient analysis


According to the 2017 Worldwide Survey of the Market for Hydraulic Fracturing:

  • GOHFER 3D is the #1 preferred fracture simulator in the industry by greater than a 2:1 margin!
  • 58% of operators choose GOHFER for their hydraulic fracturing simulation needs
  • GOHFER 3D is also considered to be the most accurate fracture simulator in the industry increasing its lead from 2016 to almost a 4:1 margin over its closest competitor

~ Kimberlite International Oilfield Research

To learn more about GOHFER®, review the additional resources at the top of this page or contact Kevin Svatek at This email address is being protected from spambots. You need JavaScript enabled to view it..