Inverting wavelets
Invert a wavelet and then import it into GeoSyn (or another seismic program such as Kingdom) to deconvolve (filter) a seismic section.
Deconvolving a seismic section using an inverted wavelet removes phase and amplitude distortions that are introduced by various earth processes. These distortions prevent the peak of a wavelet from aligning with zero time.
To invert wavelets:
1. From the Edit menu, select Wavelet
properties (
).
The Wavelet Properties
dialog box opens.
2. Click Invert to the right of the Invert Wavelet option.
The Wavelet Inversion dialog box opens.
3. In the top-right of the dialog box, click Select and choose an existing wavelet to invert from the GeoSyn project.
4. Alter the Inversion Parameters to apply inversion criteria, clicking Update to see what change a given setting has on the preview wavelet displayed in the Inverted Wavelet pane.
The Show radio buttons enable you to display either a wavelet or spectrum i the Wavelet Inversion dialog box.
5. Click Next to save the wavelet to either the GeoSyn library or to disk.
6. Using the Wavelet Inversion Save dialog box, type wavelet details and then click either Add to Library or Export to File, and then click Close.
7. From the Edit menu in the main GeoSyn display, select Seismic Properties.
The Seismic Properties dialog box opens.
8. Using the Seismic Properties dialog box, click the Processing tab, and then to the right of the Deconvolve using Inverted Wavelet option, click either Library or Import and then import the inverted wavelet created above.
It is automatically applied to your seismic.