Removal of surface layer anomaly effects

Details Removal of surface layer anomaly effects Removal of surface layer anomaly effects

1979-01-22

1981-11-03

Birmill, Howard A.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 74, G01V 132

Patent

active

042989663

ABSTRACT:
In marine seismic exploration, the distortion introduced by an anomalous surface layer is removed from seismograms. The surface layer travel time, obtained for example from fathometer readings, is converted to a model depth section of the anomalous surface layer. Another model depth section includes an assigned control layer without the anomaly. From these two depth sections, time corrections are obtained. These time corrections are applied to the seismograms at the time of reflection from each of the subsurface interfaces.

REFERENCES:
patent: 3668618 (1972-06-01), Quay
patent: 3671929 (1972-06-01), Ruehle et al.
patent: 3864667 (1975-02-01), Bahjat
patent: 3940734 (1976-02-01), Blum
"Long Wavelength Static Estimation Geophysics", Booker et al., Geophysics, vol. 41, No. 5, Oct. 76, pp. 939-959.

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