Pgs Exploration (uk) Limited

Pgs Americas, Inc.

John Brittan

Ruben D Martinez

Svein Torleif Vaage

Joel G Starr

Roald Gunnar Van Borselen

Gregory Peter Gwyn Fookes

Jeroen Hubertus Maria Hoogeveen

Jaafar Ali

A method is disclosed for processing seismic data from concurrently recorded co-located pressure sensors and geophones. The seismic data are processed by first determining an upgoing wavefield and a downgoing wavefield in the seismic data. Adaptive subtraction is then applied to at least one of the upgoing wavefield and the downgoing wavefield to remove the noise from the signal. In alternative embodiments, the upgoing wavefield can be used as a noise model for the downgoing wavefield or the downgoing wavefield can be used as a noise model for the upgoing wavefield.

Method for processing dual sensor seismic data to attenuate noise

A method is disclosed for separating energy resulting from actuating at least two different seismic energy sources from seismic signals. The sources are actuated to provide a variable time delay between successive actuations of a first one and a second one of the sources. The method includes sorting the seismic signals such that events therein resulting from actuations of the first source are substantially coherent in all spatial directions, coherency filtering the first source coherency sorted signals, sorting the seismic signals such that events therein resulting from actuations of the second source are substantially coherent in all spatial directions, and coherency filtering the second source coherency sorted signals.

Method for separating seismic signals from two or more distinct sources

A method is disclosed for attenuating noise from marine seismic signals caused by a noise in the water. The method includes determining an arrival time of a noise event at each of a plurality of seismic sensors, estimating a position of the noise source from the arrival times, and attenuating the noise event from the signals detected by the seismic sensors.

Method for suppressing noise from seismic signals by source position determination

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Walton-on-Thames, United Kingdom

John Brittan