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HAVANA - The Fault Modeling Tool

HAVANA is a software tool for describing faults and their impact on fluid flow in petroleum reservoirs. HAVANA can be used for:
  • Studies of flow effects on all fault scales.
  • Adding faults to simulation grids by displacing grid cells or by modifying transmissibility multiplicators.
  • Studies of the geometric uncertainty of the faults on volumes.
HAVANA is unique in its way of representing the faults. Each fault is described by:
  • The fault plane geometry.
  • The displacement along the fault plane.
  • The volume influenced by the fault.
  • A fault operator that is able to:
    • Displace a 2D surface or 3D corner-point grid.
    • Reverse the displacement to remove a fault from a 2D surface or 3D grid.
The pictures show a corner-point grid including a portion of the Statfjord field. In the yellow figure, faults have been removed.
In the red figure, major faults have been added and in the green figure, numerous additional smaller faults have been added.
(Pictures by Chris Townsend, Shell.)
Click here to see larger version of fault picture


In HAVANA faults are not just simple planes or surfaces, but objects with properties that can act on, and modify, reservoir models.

Havana modules are:

HAVANA Basic:

Subseismic faults are modelled as an elliptic fault plane embedded in an ellipsoidal volume. The number of subseismic faults is typically large (thousands) and faults may appear in clusters around larger faults. The figure illustrates a relay ramp controlled by the two larger faults. Orientation, displacement, and size distributions may follow fractal laws. 		Picture

HAVANA Sealing:

Sealing properties along the fault planes can be obtained using SGR, SSF or a homogeneous distribution. Sealing properties can be represented as transmissibility multipliers or as permeability field modifiers in simulation grids. 		Picture

HAVANA Structural Uncertainty:

The figure illustrates the increased variability in production profiles including petrophysical and structural uncertainty. HAVANA offers a possibility for running multiple scenarios for investigating this uncertainty. 		Picture

HAVANA Large Faults:

Larger faults cannot be described by simple elliptic fault planes so a more complex geometry is needed. The fault planes are therefore described using "fault sticks". The displacement will act on a volume around the fault planes. The figure illustrates a branching fault. 		Picture

Contacts:

Contact Per Rĝe or Petter Abrahamsen.
Last modified: Wed Oct 09 12:50:27 CET 2007