GOHFER® Software

Fracture modeling value delivery requires the right people and the right tools. Halliburton engineers are the right people that have supported hydraulic fracturing since its inception. As a company we have more fracture data and results than any company in the world. However, that data is only valuable if it can be put to use. This requires the right tools. GOHFER® software is the premier hydraulic fracture software package on the market and is the right tool to drive value to the end users.

GOHFER software 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 software, 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 software has been continually developed and refined by Dr. Robert D. Barree & Barree & Associates LLC for almost 40 years.

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

  • GOHFER software 3D is the #1 preferred fracture simulator in the industry by greater than a 2:1 margin!
  • 58% of operators choose GOHFER software for their hydraulic fracturing simulation needs
  • GOHFER software 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

GOHFER software 3D is leading the industry into the future with the most current research and technology while challenging outdated philosophies and paradigms giving you more confidence and predictability in your completion strategy.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 software’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 software’s timely technical support and comprehensive software documentation is unparalleled in the industry.   

  • GOHFER software 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

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GOHFER® Software System Requirements

Operating System (Windows 10 recommended)

  • GOHFER® Software 3D - Windows 10/8/7
  • Sentinel LDK Run-Time Environment v7.63
    • Windows 10 (Version 1703 & 1709) / 8.1 SP1 / 7 SP1 / 7 SP1 Embedded standard (x86)
    • Windows Server 2008 R2 SP1 / 2012 R2 / 2016
    • For a list of supported virtual environments, please visit http://sentinelldk.safenet-inc.com/LDKdocs/RN/

Processor / Memory:

  • 7th generation processor recommended (recommend upgrading if older than a 6th generation processor).
  • Minimum quad core processor recommended. 6 core processor is considered ideal.
  • Utilizes multi-threading and will benefit from multiple processors.
  • Non-geologic model projects 8 MB RAM recommended minimum. Geologic model projects > 16 GB ram recommended.

Video Card:

  • Minimum 512K memory video card.
  • Recommend 2GB video memory. Main recommendation is that the card has its own memory rather than sharing main memory.

Engine Priority Options:

In the Run Engine Options in v9.1, the priority level of the simulation can be set. Recommendations are shown below based on number of cores.

Setting Priority Recommendation
Background low priority with ½ the cores Recommended setting for dual core
Foreground normal priority with all the cores Best for most users
Max Performance high priority with all the cores Quad core or above recommended

For Additional Performance, consider adding the following:

  • An Nvidia graphics card with 4 GB ram
  • 32 GB ram
  • 12 core (Intel I9 Equivalent or above) processor

GOHFER® software is separated into 5 modules that may be purchased or leased independently which allows you to customize your GOHFER software package to your needs.  

 

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  

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 Software 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

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

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

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