Volumetric and non-volumetric sources-based seismic survey and method
AssigneeCgg Services SAS
InventorsEric FORGUES, Francois-Xavier GRESILLON, Julien COTTON
Life of this patent
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Abstract
A seismic survey system for surveying a subsurface. The system includes a volumetric land source buried underground for generating P-waves; a non-volumetric land source buried underground for generating P- and S-waves; plural receivers distributed about the volumetric and non-volumetric land sources and configured to record seismic signals corresponding to the P- and S-waves; and a controller connected to the volumetric land source and the non-volumetric land source and configured to shot them in a given pattern.
Claims20
A seismic survey system for surveying a susburface, the system comprising:
- a volumetric land source buried underground for generating P-waves;
- a non-volumetric land source buried underground for generating P- and S-waves;
- plural receivers distributed about the volumetric and non-volumetric land sources and configured to record seismic signals corresponding to the P- and S-waves;
- and
- a controller connected to the volumetric land source and the non-volumetric land source and configured to shot them in a given pattern.
A method for combining traces related to a surveyed subsurface for enhancing clarity of the subsurface, the method comprising:
- receiving first traces corresponding to a volumetric source;
- receiving second traces corresponding to a non-volumetric source, wherein the first and second traces correspond to the surveyed subsurface;
- extracting from the first traces, third traces that correspond to near offset reflections and transmissions and the third traces contain substantially P-waves;
- replacing with the third traces, in the second traces, fourth traces that correspond to the near offset reflections and transmissions, wherein the fourth traces include both P- and S-waves;
- and
- using the obtained combination of second traces and third traces to generate a final image of the subsurface.
A method for conducting a surveying of a subsurface, the method comprising:
- deploying plural receivers;
- burying a volumetric source underground;
- burying a non-volumetric source underground;
- shooting the volumetric and non-volumetric sources;
- and
- combining first traces corresponding to the volumetric source with second traces corresponding to the non-volumetric source to generate a final image of the subsurface.
Dependencies are inferred from the claim text.