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SKUA Structure and Stratigraphy

Modeling without distortion.

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