HorizonCube

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Dip-steered auto-tracker to create a dense set of horizons

HorizonCube is a game-changing technology that impacts every level of seismic interpretation. A HorizonCube consists of a dense set of correlated 3D stratigraphic surfaces that are assigned a relative geological age.  The technology was initially developed for sequence stratigraphic interpretation and as such was part of the SSIS plugin where it was called chronostratigraphy. Because the technology has a much wider application range the HorizonCube became a separate plugin in v.4.2. Henceforth SSIS is an add-on to the HorizonCube that focuses on sequence stratigraphic interpretation and Wheeler transformations.

Other applications of the HorizonCube include:

Detailed geologic model building
Low frequency model building for seismic inversions
Well correlations.

In the HorizonCube we typically create hundreds of chrono-stratigraphic horizons per sequence. Each sequence is bounded by mapped top and bottom horizons. Chrono-stratigraphic horizonsare either modeled (stratal slicing (also known as proportional slicing), parallel to upper - and parallel to lower horizon), or auto-tracked. The second generation 3D auto-tracker algorithm implemented in the HorizonCube tracks the dip/azimuth field to generate horizons that are typically separated by one sample at the starting position.

Optionally the user can smooth the dip-field and thus reduce the impact of random noise. An advantage of dip-steered auto-tracking is that dip fields are more continuous than amplitude fields. This is as opposed to conventional autotrackers that pick amplitudes and which lead to a set of patchy horizons rather than a set of continuous, chronologically consistent horizons.

To create a HorizonCube the user has to supply:

A steering cube (created by the Dip-Steering plugin)
At least two mapped bounding horizons
Mapped fault planes (optional).

Bounding horizons are either imported, or mapped in OpendTect. Here the user has two options: to use OpendTect's conventional amplitude & similarity auto-tracker, or to use the new dip-steered auto-tracking algorithm incorporated in the HorizonCube. The advantages of the latter are speed and watertight intersections at fault planes.

Also conventionally mapped / imported horizons can be made watertight at intersections with a new horizon trimming tool that comes with the HorizonCube plugin.

More information

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Articles - HorizonCube
Brochure - HorizonCube
HorizonCube applications

HorizonCube
Well Correlation Panel
SSIS
Dip-Steering
Neural Networks
CCB Fluid Contact Finder
Velocity Model Building
SynthRock
Seismic Spectral Blueing
Seismic Coloured Inversion
Seismic Feature Enhancement
Seismic Net Pay
Workstation Access
Petrel Access
PDF3D
Deterministic & Stochastic Inversion
PSDM Kirchhoff
PSDM Tomography
CLAS Lite
XField