SKUA Modeling Platform

A Step-Change in Modeling


Sub-surface modeling is an essential prerequisite for accurate volumetrics, whether static or dynamic; however, the task of transforming interpretation to a 3D model has been always tedious. SKUA introduces a revolutionary approach that preserves interpretation data while greatly simplifying modeling as well as all the processes that use a model, such as 3D restoration, 3D fault seal analysis, velocity modeling, flow simulation and mapping.
 

A new approach to an old problem

 

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 the UVT Transform, geoscientists can model geobodies, reservoir properties and other attributes in their true depositional state without distorting the current geometry or the paleo-geometry.

Workflow optimization

A UVT model can be used to construct (typically in one step):

  • Velocity models for imaging
  • Geological grids for geostatistical simulation of rock properties, computed directly from the UVT model without any additional user interaction
  • Reservoir grids for reservoir simulation extracted directly from the UVT model. The only optional user interaction is the definition of potential alignment to faults.
  • Consistent structural maps
  • Geomechanical grids for geomechanical simulation (with a link to Abaqus) or coupled flow-geomechanical simulations
  • 4D basin modeling grids (combining SKUA model and 3D restoration in Kine3D®-3)
  • Paleo-flattening of seismic volumes to perform interpretation QC and UVT model QC

UVT Transform®

Any particle of sediment observed today in the geological domain G holds a series of properties, such as:

  • The coordinates (x,y,z) where (x,y) are the geographical coordinates and (z) is the altitude as observed today;
  • The coordinates (u,v,t) where (t) is the geological time of deposition of the particle and (u,v) are its paleo-geographic coordinates at geological time (t).

The (x,y,z) coordinates and the (u,v,t) paleo-coordinates so defined are intimately linked to each other by the following three functions:

u = u(x,y,z) ; v = v(x,y,z) ; t =t (x,y,z)

The functions u(x,y,z), v(x,y,z) and t(x,y,z) allow any location (x,y,z) in the geological domain G to be transformed into a location (u,v,t) in the depositional domain G*: Such a transformation is called UVT Transform.

Geologically constrained volume modeling

The SKUA UVT model is geologically constrained by a series of rules. These include:

  • Dip/azimuth information anywhere in the volume. Example: Well dip meter data or surface dip measurements provide internal layer geometry information used by the UVT Transform.
  • Well path information. Example: The layer geometry is constrained by the fact that a particular section of the well path did not intersect the top or base of the layer.
  • Fault type (normal, inverse) information. Example: Ensuring that horizon contacts do not cross on the fault plane.
  • Sequential stratigraphic rule and erosion rules. Example: Ensure that the horizon was not deposited in a particular area.
  • Intra-formation chrono-stratigraphy. Similar to dip meter data, intra-layer picks can be used to better control the UVT Transform, which in turn provides better alignment between the UVT space and the seismic signal, a condition sine-qua-non of correctly merging well and seismic information away from the wells.

System Requirements

System Requirements Processing
  • 64-bit, for x64 architecture processors
  • Microsoft® Windows® 7, XP, Vista
  • Red Hat® Enterprise Linux® 5.3 and above, 6.0 and above
  • CUDA/GPU functionality requires NVIDIA® Quadro® 4000 or above graphics card
Interoperability Options

All Epos®-based applications enable interoperability with third-party data stores, including:

  • OpenWorks® 2003.12
  • OpenWorks R5000
  • GeoFrame® 4.5
  • OpenSpirit® 3.2.3