Version NORSAR-2D -Ray-Modelling Software

NORSAR-2D is now part of the NORSAR Software Suite framework which in addition includes NORSAR-3D, SeisRoX and MDesign.

The new NORSAR-2D Ray Modelling integrated in NORSAR Software Suite is now supplemented by advanced 2-point ray tracing and seismogram generation from the 2020 version. The classic NORSAR-2D ray modelling tool has now taken a further step towards being fully integrated in a user-friendly new framework supporting both Linux and Windows.

NORSAR-2D

• Is a powerful package for ray-based seismic modelling and depth conversion.
• Is flexible, fast, accurate and user-friendly.
• Is ideal for training, teaching, research, as well as industry-scale projects.

Some of the applications:

• Build and depth-convert 2D models.
• Plan and evaluate surveys.
• 2D illumination studies.
• Ray path, event, and attribute analysis.
• AVO/AVA analysis.
• Understand reflections in seismic sections.
• Understand shadow zones in seismic sections.
• 2D seismic processing support.

Improve your understanding of ray propagation in isotropic or anisotropic models. Identify and analyse primaries, multiples, and multiple ray paths using re-tracing functionality.

Generate full elastic simulations of shot gathers and zero-offset sections. Take diffractions and mode conversions into account, and simulate multi-component recording.

Analyse event attributes including AVA and AVO behaviour using cross-plotting, re-tracing, event sub-selection, and ASCII event export.

• One or more 2D lines in either a 2D or 3D project environment.
• Time to depth conversion of interfaces by vertical stretching or image rays.
• Interval velocity estimation from inversion of stacking velocities.
• Import of external horizon and elastic property data in simple ASCII or standard SEG-Y formats.
• Digitizing of horizons from SEG-Y data or bitmap images.
• Pre-processing, resampling and editing of sampled interface or property data using smoothing recommendations as provided by the software.
• Interactive model building, modification and update by mouse control.
• Generation and assignment of property fields and lateral/vertical gradients.
• Integration and upscaling of well logs for property field generation.
• Inclusion of overhang structures, truncations, salt, faults and other model complexities.
• Multiple property field options independently for each layer in the model, including velocity, density, and attenuation as constants, gradients and spline functions.
• Extension for rock physics modelling (VelRock).
• Model export as 2D property grid files for external FD modelling.

• Shots and/or receivers can be anywhere in the model, e.g. at the surface, at constant depth, along wells, along horizons or along towed cables.
• Simple test shooting for defined take-off directions.
• Easy simulation of stacked sections and time-migrated sections.
• Modelling of common-shot gathers for selected targets.
• Inclusion of edge diffracted rays
• Anisotropic ray-modelling for TI media.
• Wavefront construction for efficient generation of travel-time tables.
• Automatic generation of direct and primary ray codes as well as mode conversions.
• No limitation for complex ray code generation (multiples).
• Recording of multiple ray paths, turning rays and multiple receiver components.
• Control of ray tracing parameters for balancing accuracy and efficiency of each modelling run.