US 7,558,154 B2
	Method of and apparatus for processing seismic data
Dirk-Jan Van Manen, Oslo (Norway); Johan Olof Anders Robertsson, Oslo (Norway); and Aslaug Strommen Melbo, Oslo (Norway)
Assigned to WesternGeco L.L.C., Houston, Tex. (US)
Appl. No. 10/501,271 PCT Filed Jan. 09, 2003, PCT No. PCT/GB03/00052 § 371(c)(1), (2), (4) Date May 01, 2006, PCT Pub. No. WO03/058276, PCT Pub. Date Jul. 17, 2003.
Claims priority of application No. 0200560.1 (GB), filed on Jan. 11, 2002.
Prior Publication US 2007/0002688 A1, Jan. 04, 2007
This patent is subject to a terminal disclaimer.
Int. Cl. G01V 1/28 (2006.01)

U.S. Cl. 367—43  [702/17]

15 Claims

1. A method of processing multi-component seismic data obtained from seismic signals propagating in a medium, the method comprising the steps of: selecting a first portion of the seismic dab containing only events arising from critical refraction of seismic energy; and determining a first calibration filter from the first portion of the seismic data, the first calibration filter being to calibrate a first component of the seismic data relative to a second component of the seismic data.