Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Reexamination Certificate
2011-01-18
2011-01-18
Lobo, Ian J (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Offshore prospecting
C367S021000
Reexamination Certificate
active
07872942
ABSTRACT:
A pressure wavefield and a normal velocity wavefield measured on a smoothly shaped acquisition surface by towed dual-sensor marine seismic streamers are decomposed into up-going and down-going pressure and particle velocity components on an observation level between the acquisition surface and a sea surface of undetermined shape. The up-going and down-going pressure and particle velocity components are extrapolated iteratively in steps from the observation level toward the sea surface. An image point and a reflection coefficient of the sea surface at the image point are determined from the iteratively extrapolated up-going and down-going pressure and particle velocity components.
REFERENCES:
patent: 5835451 (1998-11-01), Soubaras
patent: 6529445 (2003-03-01), Laws
patent: 7123543 (2006-10-01), Vaage et al.
patent: 7768869 (2010-08-01), van den Berg et al.
patent: 2007/0214663 (2007-09-01), Pica
patent: 2008/0089174 (2008-04-01), Sollner et al.
Lasse Amundsen, Tage Rosten, Johan O.A. Robertsson, Ed Kragh; “Rough-sea deghosting of streamer seismic data using pressure gradient approximations”; (2005); Geophysics, vol. 70, No. 1, pp. V1-V9.
Jon F. Claerbout; “Seismic Data Processing with the Wave Equation”; (1976); Fundamentals of Geophysical Data Processing, Chapter 11; pp. 227-263.
Jeno Gazdag; “Wave equation migration with the phase-shift method”; (1978); Geophysics, vol. 43, No. 7, pp. 1342-1351.
Johan O.A. Robertsson, Ed Kragh; “Rough-sea deghosting using a single streamer and a pressure gradient approximation”; (2002); Geophysics, vol. 67, No. 6; pp. 2005-2011.
Joerg Schleicher, Jesse Costa, Amelia Novais; A comparison of imaging conditions for wave-equation shot-profile migration; (2007); SEG Expanded Abstract; pp. 1445-1449.
J.T. Fokkema, P.M van den Berg; “Seismic Applications of Acoustic Reciprocity”; (1993); Elsevier, Chapter 10 “Wavefield Decomposition”, pp. 199-213.
Lobo Ian J
PGS Geophysical AS
Schweppe Charles R.
Thigpen E. Eugene
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