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US 9,791,578 B2Granted
Apparatus and method for seismic data acquisition with simultaneous activation of clustered vibrators
AssigneeCgg Services SAS
InventorsThomas Bianchi, Julien Meunier, Olivier Winter
Life of this patent
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Abstract
Methods for seismic exploration of a subsurface formation increase productivity by simultaneously actuating closely located vibratory sources. Individual vibrations generated by different sources actuated simultaneously are encoded to enable separation of seismic data corresponding to each of the individual vibrations.
Claims19
A method for seismic exploration of a subsurface formation, the method comprising:
- deploying seismic receivers along receiver lines over the explored subsurface formation;
- grouping vibratory sources in clusters, so that at least one of the clusters includes several vibratory sources that are placed at less than a predetermined distance from one another while vibrating, the predetermined distance being less than an average distance between adjacent receiver lines;
- and
- actuating the clusters cyclically, so that, in each cycle, the vibratory sources within one of the clusters vibrate during a substantially same sweep time, vibrations of the vibratory sources pertaining to the one of the clusters being encoded to enable separation of recorded seismic data into subsets corresponding to the seismic vibrations.
1 more element
A method for seismic exploration of a subsurface formation, the method comprising:
- deploying seismic receivers along receiver lines over the explored subsurface formation;
- grouping vibratory sources in clusters, so that at least one of the clusters includes several vibratory sources that are placed less than a predetermined distance from one another while vibrating, the predetermined distance being less than an average distance between adjacent receiver lines;
- and
- actuating the clusters cyclically to produce seismic vibrations propagating in the subsurface formation, so that, in each cycle, the several vibratory sources in the at least one of the clusters vibrate during a substantially same sweep time, to generate seismic vibrations encoded to enable, for vibration frequencies higher than a threshold frequency, separation of recorded seismic data into subsets corresponding to each of the vibratory sources.
1 more element
Dependencies are inferred from the claim text.