Geometry assignment / QC

g-Platform’s geometry application and QC capabilities can provide the user with many advantages:

• Multiple QC displays for geometry assignment
• Highly interactive integration between all views
• Crossplot any 3 trace headers by horizontal/vertical/color axes
• Manipulate trace headers by regular expressions or matrix
• Geometry QC by first-break picking, velocity. animation
• Different attributes calculation

First-break picking

g-Platform comes with interactive manual and robust semi-automatic first-break picking followed by gradient model refraction or TOMO statics solution. This allows for very fast turnaround on seismic 2D/3D projects of any size. Our solution based on scientific, technological and implementation advantages listed below:

First-break picking/tracking:

• Picking in any sorting domain
• Apply LMO or LMO Trend function
• User-friendly manual picking of first energy
• Automatic local phase tracking (for later arrivals)
• Tracking based on 4D Delaunay interpolation (x, y, offset, azimuth)
• Picking in common offset-azimuth super-gather enhancement mode
• Robust automatic picking extrapolation (tracking). Each picked shot covers area of entire patch (highly efficient for large 3Ds)
• Apply filtering sequence within the picking process

REFRACTION STATICS

g-Platform comes with interactive manual and robust semi-automatic first-break picking followed by model-free or layer-based refraction statics solution. This allows for very fast turnaround on seismic 2D/3D projects of any size.

Our solution based on scientific, technological and implementation advantages listed below:

Solver properties

• Global L1-norm inversion
• Fast solving t0 -model implementation based on {x, y, offset, azimuth} parameterization – macro model independent
• Multi-iterative linear equations method
• Surface consistency term (residual refraction statics)
• Coordinate consistency term (especially effective for 4D processing on different geometries)
• Offset dependent slope determination
• Azimuthal term (offset sign in 2D)

RESIDUAL STATICS

2D/3D/4D Residual Statics Solution

Our strategy is surface-consistent and coordinate-based determination of static corrections corresponding to near-surface structure effects not compensated by refraction statics (both high and mid frequency statics). Highly effective parallel implementation allows the processor to reduce project turnaround time whenever precision and accuracy of Geomage residual statics algorithm increases the quality of the final product by stack-power maximization

Our solution based on scientific, technological and implementation advantages listed below:

Model traces

• At each CDP location
• Super-gather / Dip composition
• Construction by global L1-norm inversion
• Flexible processing sequence
• Global L1-norm inversion
• 4D term
• Interactive updates after each iteration

Deconvolution

Geomage’s g-Platform implementation of surface consistent modules have a multi-frequency mode which allows accurate amplitude estimation, equalization and enhancement within the frequency spectrum range.

• Multi-frequency surface consistent amplitude recovery
• Multi-frequency surface consistent deconvolution

Signal processing

g-Platform™ incudes a complete range of noise attenuation and signal enhancement tools:

• Spike / spurious amplitude removal
• FK filtering
• Advanced 2D and 3D linear noise removal modules: FDNA, LNA, Radial transform, Radon
• High resolution radon transform filtering
• FX and FXY random noise removal
• Cadzow rank reduction noise removal
• Spectral Balance and Q compensation
• Surface consistent amplitude correction
• Fully interactive testing inside the seismic loop

Multiple Attenuation

Geomage has developed proprietary techniques optimized for both CPU and GPU clusters, providing multiple removal solutions to meet any data challenge. Multiples, in both land and marine 2D and 3D seismic data, must be taken care of through attenuation. The user can choose which tool to use from the following list, dependent on the multiple generating mechanisms and geological setting.

• True azimuth 3D SRME – models and subtracts multiple energy in 3D true-azimuth domain
• High resolution radon transform demultiple
• High resolution Tau-P domain multiple removal
• Fast radon multiple attenuation
• Shallow water de-reverberation

Velocity analysis

g-Platform™ provides fully integrated and interactive velocity analysis as part of Stack Imaging module. It provides the user with all the necessary tools to create the most accurate stacking velocities and data imaging:

• Gather and common offset gather views with and without NMO applied
• Supergather options to improve semblance and common offset resolution
• High resolution semblance displays interactively tracked to real time updated gather displays
• On the fly adjustable CVS mini stack displays with velocity picking mirrored in semblance mode
• Topographically referenced velocity picking
• Anisotropic 4^th order NMO picking

Stack imaging

g-Platform’s stack imaging module integrates all of the functionality of velocity analysis with a fast data stacking and visualization tool:

• Pick velocities in semblance or mini stack mode and quickly stack the data
• Interactively test mute functions, either by manual gather picks or stretch mute
• Easily save stacks to the database and interactively compare stack versions
• Apply any processing in the sub-sequence to condition the data, deconvolution, noise attenuation, scaling, filtering almost anything
• Multiple subsequence streams to condition data for velocity analysis independent of stacking
• Interactive map display allows velocity analysis at any selected location
• Interactive stack display can be used to examine velocity analysis results at any cdp location
• Partial restack of only the altered areas in velocity revision

Time imaging

Time imaging in g-Platform based Kirchhoff algorithm with variety of unique and powerful functionalities that allow accurate time migration

• Kirchhoff pre/post stack migration from topography
• Picking RMO velocities in migration semblance mode and quickly stack the data
• Interactively test mute functions, angle stacks, offset stacks
• Picking mute function in angle stack mode, allowing comprehensive angle dependent mute
• Automatic scanning of migration velocity percentage
• Easily save stacks to the database and interactively compare stack versions
• Running on CPU or GPU (x 30 factor comparing to CPU )