Methods and apparatus for the generation and transmission of...

Details Methods and apparatus for the generation and transmission of... Methods and apparatus for the generation and transmission of...

G - Physics

01

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349/13

G01V 1/02 (2006.01) G01V 1/04 (2006.01) G01V 1/147 (2006.01) G01V 1/22 (2006.01)

Patent

CA 1093199

ABSTRACT OF THE DISCLOSURE Methods and apparatus for generating and transmitting seismic signals for the purpose of seismic exploration are disclosed, The signals are force pulses shaped to have a spectrum constrained to the range of frequencies which are necessary for penetration to desired depths within the earth and for resolution of the geological reflection surfaces therein, These pulses are provided in a non-repetitive or aperiodic train, constructed to produce a transmitted energy spectrum whose mean energy extends smoothly at a sub- stantially constant level over the spectrum frequency range, notwithstanding that the repetition frequency of the pulses may be swept over a frequency band much narrower than the spectrum range, The transmitted spectrum can exhibit an auto-correlation function having a major lobe which is predominant over any side lobes, corresponding to a desired level of resolution of the geological reflection surfaces.

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