Claritas / Overview / Features / Velocity Analysis

GLOBE Claritas Velocity Analysis

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The interactive GLOBE Claritas Velocity Analysis (CVA) application is an excellent tool for velocity analysis of onshore or offshore data. The current stack (or range of in-lines) is displayed, and the user can then perform CVS, CVG or semblance analyses in real-time, on any part of the seismic section. The stacks corresponding to each constant velocity are displayed in a movie-like manner by sliding the cursor.

Stacking velocity picks can then be made on the basis of reflector continuity and are directly saved to disc and displayed in the interactive ISOVELS graphical velocity editor. A stack comparison window may be used to check the improvement in the final stack, as the picks are made. Semblance analyses can also be quickly performed and analysed at regular intervals, which is the most efficient method for larger data-sets; for high-resolution data, you can concentrate on important data areas with densely-spaced CVS analyses.

CVA Application

Semblance analysis may also be performed with the VELSPEC module, which can analyse individual CDPs or groups of CDPs and output the velocity semblance maps as colour plots, or to disc as seismic traces. The SQC application may then be used to display the semblance traces stored on disc, from which the user may pick velocity functions with the mouse, semi-automatically.

The HVA module may be used for horizon-based velocity analysis. It tracks along a series of previously digitised horizons and extracts the semblance maxima within pre-set limits, to produce a densely sampled velocity map along specified horizons.