Patent ID: 6687619
Filing Date: 2004-02-03
Classification: G01V

Abstract:
A method of seismic surveying using vibrational seismic energy sources activated by sweep signals, the method comprising:(a) selecting a plurality of seismic energy sources to be used for surveying and a second number of sweep segments in excess of said first plurality; (b) selecting a third plurality of a highest order harmonic to be attenuated from processed data acquired using said seismic sources; (c) defining a sweep signal associated with each of said sources, each sweep signal comprising a plurality of sweep segments, each sweep segment of each seismic source having a determined phase; (d) driving each said source with its associated sweep signal to generate seismic waves propagating into the earth and recording a seismic signal in response thereto; and (e) processing said recorded seismic signal using an augmented signal comprising at least one of: i) said sweep signal concatenated with at least one of said plurality of sweep segments and ii) said recorded seismic signal added with at least one sweep segment of said recorded seismic signal, wherein said recorded seismic signal is associated with each seismic source to produce a processed plurality of processed seismic signals, each of said plurality of processed seismic signals associated with a different one of said seismic sources and having harmonics up to said selected third plurality attenuated.