Marine adaptive source system

G - Physics – 01 – V

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349/9

G01V 1/38 (2006.01) G01V 1/04 (2006.01)

Patent

CA 1089972

DETERMINATION OF REFLECTIVITY AND WATER DEPTH FOR FIRING MARINE SOURCES AS AN INVERSE DISTORTION OPERATOR Abstract of the Disclosure In marine seismic exploration, seismograms recording reflected energy generated from conventionally fired sources are used to measure the characteristics of the medium through which the energy passed. These measurements are converted into control parameters for the sources. When the sources are fired under control of these parameters, seismograms having enhanced reflections are produced. As an example, simultaneously fired sources produce seismograms which axe used in the measurement of water bottom reflectivity and water depth. The measured reflectivity and water depth are converted into a time domain operator representative of the inverse of the reverberation distortion in the water layer. The array of sources is then fired in a sequence which produces an acoustic pressure wave having the inverse time domain characteristics. The sources are alternately fired simultaneously and in groups producing said inverse time domain operator.

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