Phase Rotation With Diagnostics

If you open the Phase Rotation function from a fence display, you can use the diagnostics features to analyze your line tie.

Understanding the Phase Rotation With Diagnostics Window

The blue curve is the normalised cross-correlation function, while the red curve is the envelope amplitude of the cross-correlation function. If two seismic lines are perfectly tied, the cross-correlation curve will be symmetrical about zero time and the largest peak of the envelope will be positive and symmetrical about zero time.

Using the Phase Diagnostics

Define your area of interest by specifying a start and end time under Time Window or move the grey bar on your seismic to bracket your time range.
Select which Reference Line you which to use.
Enter the number of traces to use in the cross-correlation analysis under Average Traces.
Apply a bulk shift to center the largest peak of the envelope about zero time. The seismic will update dynamically. Apply a phase rotation to make the cross-correlation curve symmetrical about zero time.
Click <OK> to exit, and save the phase correction on the fly. Alternatively, click <Cancel> to exit without saving changes. You will probably have to re-pick your data after phase corrections.

You can also click the <Bulk Diff> and <Phase Diff> correction buttons in the lower right-hand corner of the window. These are an estimate of the bulk shift and phase difference between the seismic lines.

What do you want to do?