SKUA-GOCAD Saturation Modeling

A guided workflow for building 3D compartmentalized saturation models

Facies-based 3D saturation height model in SKUA-GOCAD
 
The Paradigm® SKUA-GOCAD™ fluid saturation workflow provides a guided process for building 3D models of initial water saturation, taking into account reservoir heterogeneities and compartmentalization.

Many advanced methods are provided to define transition zones. Multiple methods can be combined for a single model by defining a different method for each compartment and/or lithology.  The same functions applied to the reservoir model can be applied to wells, to create saturation curves at well resolution that can be compared to the available saturation logs or core data.

Compartmentalization

Compartments are defined on top of the SKUA volume model using different criteria (faults, property ranges, polygons, etc.). Faults can be defined as sealing or non-sealing, reservoir zone by reservoir zone. The computation of properties such as the Smear Gauge Ratio in our Fault Seal Analysis module helps the user specify this information. Faults can be extended to “close” blocks if necessary. Polygons and property cut-offs can also be used to define different sub-regions of the model.

Once defined, a given compartmentalization methodology or scenario can be reapplied to any grid; for example, to both the geologic grid and the flow simulation grid.

Saturation modeling features

  • Takes into account irreducible saturations and transition zones
  • Multiple methods, including:
    • Height functions
    • Leverett J-functions
    • Thomeer and capillary functions
    • User-defined equations
  • Modeling zones defined using:
    • Lithology and rock-type classes
    • Reservoir compartments
  • Multiple compartments and contact scenario management
  • Scale-independent definition of compartments/contacts/saturation functions
  • Faulted contact management

Saturation modeling benefits

  • Easy setup of reservoir compartments using fault sealing/non-sealing properties
  • A workflow-driven definition of water saturation functions