Seismic RMS depth conversion


Depth conversion with seismic processing RMS velocities is supported in VelocityManagerII.

VelocityManager II supports both SEGY formatted seismic velocities and ASCII formatted velocities, in a very wide range of formats through the flexible FDL™ processing route.

At its core the process is designed to minimise the problems which can introduced to the process through inherent data uncertainties. This is achieved through a rigorous "keying" for the velocities to the interpreted horizons and recompilation of the interval velocities, in preparation of the well calibration and depth conversion. Both 3D and 2D data sets are fully supported, and all data is validated by default, any problems are recorded to the project report.

2D data is fully supported.

The process is user-friendly, even under the most demanding of circumstances. Careful quality control of the input data and the resultant interval velocity grids is fully supported, before optional well calibration and depth conversion.

Grid Spectrum Analysis is a very effective grid data display, editing and correction function. It supports very rapid grid editing and correction where the grid values include non viable Z values.

A key application of the spectrum analysis is to the interval velocity grid for example, where they have been derived from stacking velocity data, it will reveal velocity values which are outside a viable range for the interval velocities. High and low values can be easily removed and rebuilt, through interactive control of the spectral analysis dialogue.

Spatial grid Filtering. Filtering can have application in removing high frequency noise in the interval velocity grids form RMS seismic velocities. Noise in interval velocities can be safely removed where the spatial frequencies of the noise are higher than the "natural" limit of the data which is controlled by the stacking process. This can be achieved in VelocityManager very easily without violating the real data, as illustrated below. The high frequency noise is effectively removed.

A high performance Matrix filter with a shaped and weighted operator is designed to give intuitive control and highly effective in splitting the wavelength spectrum into high an low pass elements for close quality control.

Interval velocity before and after filter noise reduction.


Move mouse pointer over map below to illustrate the filtered velocity grid.

Illustration of filtered velocity grid




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