Quantative seismic data analysis provider Sharp Reflections has upgraded its proprietary software PreStack Pro to expand its capabilities in the 4D domain.
Quantative seismic data analysis provider Sharp Reflections has upgraded its proprietary software PreStack Pro to expand its capabilities in the 4D domain.
The 6.2 update, developed in partnership with Equinor, improves pre-stack seismic analysis and production-based seismic interpretation.
Launched in early 2020, the project is aimed at developing PreStack Pro’s 4D processing and analysis functionalities, establishing an interactive framework for the efficient handling of time-lapse seismic data. With all volumes now organised into a single multi-vintage object, 4D visualization, post-processing and amplitude analysis are all streamlined.
PreStack Pro 6.2 introduces Vintage as a new data-type, used to organize pre-stack angle stacks or gathers into a single multi-dimensional volume with angle/offset and vintage as gather axes. All processing and data analysis algorithms automatically loop over all vintages, allowing users to execute multi-vintage workflows in one simple step.
New Difference-in-Viewer functionality has been introduced to interactively calculate the difference between any two time-lapse surveys in both section and map view. Users set one vintage as a baseline, and automatically display differences between any other monitor volume. This new capability dramatically improves overall efficiency and data organization by eliminating the need to calculate and manage difference volumes. Difference-in-Viewer functionality is not restricted to 4D applications, and can be used to compare different processing flows, or to quickly display amplitude changes with offset or angle.
Match filtering has been improved with Global Filter Matching, to estimate and apply one filter to match two seismic volumes. This complements the Trace-by-Trace Matching algorithm released in PreStack Pro 6.0. Filters can be specified as output, manipulated using other PreStack Pro algorithms, and then reapplied to the seismic volume.
Several existing algorithms have also been improved. RMO/NMO now supports vintage or azimuthally varying velocity and Eta-fields. Align2 now includes new modes for aligning time-lapse data. EPS3D and ECED3D allowing auxiliary dip-volumes as input to better control dip-steered noise removal across vintages.
Users can now interactively pick seed points and display auto tracked horizons by linking the 3D Viewer with Horizon Tools.
Bill Shea, CEO of Sharp Reflections said: ‘With pre-stack gathers now available in a single volume, data organisation is vastly improved, leading to accelerated insights and improved context. For the first time, our users can quickly see where the changes are happening and analyse these in more detail without the need for manual calculations or comparisons.’
