Fugro-LCT Software^© > 3D Modelling

3D Modelling with 3MOD^©

3MOD is an interactive, horizon-based program for producing realistic geologic models that satisfy known geologic, seismic, and observed gravity gradient and magnetic data. A model displays as a series of stacked grids, each representing the depth to a particular geologic horizon. You can specify the density, susceptibility, and velocity between these horizons in a variety of ways to create and alter the model.

3MOD uses a Fast Fourier Transform (FFT) approach, enabling interactive procedures. Changes occur to the model in real-time. Potential field response calculates immediately, allowing rapid convergence to an acceptable geologic model. A semi-automatic, iterative inverse mode to improve the structural model is also included.

3MOD model showing 3 cross sections. The cross sections display both the structure and the density variations.	Model cross section showing the model horizons (solid lines) with SEG-y data in the background. Densities are overlaid and given a semi-transparent
Example of a 3D Salt model. In addition to modelling salt, 3MOD is an excellent tool for modelling and imaging other geological structures, e.g. volcanics, near vertical faults, carbonate reefs, graben structures, etc.

 

Additional 3MOD Features

• Linked to JI-3MOD, Fugro Gravity & Magnetic Services’ new Joint Inversion routine
• Import and export of voxets for modelling variable density, susceptibility and velocity.
• Calculation on either an irregular or flat observational surface
• Complex density and susceptibility properties
• Model editing along a cross section or in map view with local regridding.
• Linked to LCTSEIS-3D for improved density inversion

3MOD^© models are created with the sub-program MAK3MOD^©.

 

Joint Inversion with JI-3MOD^©

A program to simultaneously manipulate gravity, gravity gradient & magnetic data.

• Inverts on any combination of gravity, the gravity gradient and magnetic data
• Tuned for Falcon AGG data
• Whole-surface inversion eliminates “pinnacle” noise.

 

Seismic Integration with LCTSEIS-3D^©

A program to manipulate velocity, density and susceptibility voxets.

• Converts seismic velocity volumes to density volumes and vice versa
• Forward calculates the gravity/magnetic field based upon a density/susceptibility volume
• Inverts density based upon an observed gravity

 

3D Modelling with S3MOD^©

Three-dimensional gravity and magnetic fields modelling program that:

• Creates contour-based models, allowing bodies to have arbitrary shapes
• Provides rapid modelling of complex geologic features, such as salt domes and reefs