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SKUA Structure and Stratigraphy

Modeling without distortion.

Chronostratigraphic slice of SKUA model
In exploration and production, state-of-the-art 3D modeling and construction of 3D grids is similar among competing applications: The conventional technique for constructing a model is pillar-based. Unfortunately, in environments containing Y faults or oblique faults, pillar-based construction requires modifications of the fault geometry and/or removal from the model. The technique introduces deformations of the grid cell geometry, which adversely affect the distribution of petrophysical properties and flow simulation results.

SKUA (Subsurface Knowledge Unified Approach) is a 3D methodology that unifies all subsurface discrete models. SKUA embeds a native, fully-3D description of the faulted volumes. This is achieved by using the UVT Transform, a technology based on the observation that horizons represent geochronologic surfaces. Working with a paleo-geographically correct mesh, geoscientists can model geobodies, reservoir properties and other attributes in their true depositional state without distortion to the current geometry or paleo-geometry.

Other structure and stratigraphy benefits

  • Fast and accurate “true” 3D modeling (without pillars)
  • One “true” 3D model with many direct uses (simulation, basin modeling, inversion, etc.)
  • One model for structure, stratigraphy and reservoir grid
  • Geologically constrained

As a direct output from the SKUA UVT model, it is possible to compute:

  • Displacement maps everywhere on the fault surface
  • Juxtaposition maps
  • Structural maps
  • Shale-gouge ratio and weighted-shale-gouge ratio on faults
  • Deformation of the layers, strain and stress
  • Probability of fracturing and directions of fractures
  • Spill point probability

System Requirements

Interoperability Options
All Epos®-based applications enable interoperability with third-party data stores, including:
  • RESQML 2.0.1
  • OpenWorks® R5000.10
  • GeoFrame® 2012
  • Petrel* 2019 & 2018
  • Recall™ 5.4.2
(*is a mark of Schlumberger )