3D Fault Modelling

The first step in the assessment of trap integrity involves constructing a geologically realistic 3D model of the fault structure using fault and horizon picks from seismic workstations, depth converted maps of grid surfaces or 3D surfaces created in other modelling packages. Building a 3D geological model is often compromised in some way by inadequacies in the initial data and then by limitations in the modelling software. The same is true for geocellular models used for reservoir simulations. Experience shows that geocellular models commonly contain geometric and geological inconsistencies, further leading to unreliable flow simulations associated with faults.


Software:

Our range of in-house software for 3D Model Building include:
 

  • TrapTester T7 for complete 3D structural & stratigraphic infill modelling
  • TransGen for quality control of reservoir models from ECLIPSE™



How we can help you
 

  • 3D Framework Model Building: Construct a robust geological model of the prospect. Model the intersection of fault and horizon surfaces to produce a gapless 3D structural framework. Structure is continuous around the fault-fault intersections. No requirement for a tabulation of fault to fault relationships.
     

    3D Stratigraphic infill Modelling: Based on the 3D structural framework and stratigraphic rules derived from well data, infill the structural model with reservoir-scale layers to define the position of reservoir intervals at the fault. Infill stratigraphy between wells is governed by a blend of the stratigraphic rules from the wells that are natural neighbours to the point in question. The intersection of infill stratigraphy with faults follows the same structural consistency procedures as for the seismic or depth converted horizons.
     

    QC Faulted Cellular Models: Predicting the effects of faults on production depends on modelling the correct cell juxtapositions across faults in geocellular models. Comparison of cellular model-derived juxtapositions (visualized using TransGen) with those predicted by TrapTester T7 is an efficient and effect way to quality check the cellular model. This approach also allows comparison and adjustment of TransGen predicted cellular Shale Gouge Ratios with those of TrapTester T7.

    For further details about our Seismic Interpretation consulting services, please contact our consultancy team.

 



 
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