Cgg Services Sas

Cgg Services Sa

Cécile Berron

Eric Forgues

Julien Cotton

John James Sallas

Julien Meunier

Thomas Bianchi

Benoit De Cacqueray

Michael Beilles

Thierry Klein

Philippe Herrmann

A method for improving a 4-dimensional (4D) repeatability by modifying a given path to be followed by a source during a seismic survey. The method includes receiving the given path at a control device associated with a vehicle that caries the source; following the given path during a first seismic survey that is a baseline survey for the 4D seismic survey; deviating from the given path to follow a new path when encountering an obstacle on the given path; and updating the given path, based on the new path, to obtain an updated given path when a deviation condition is met.

Method and seismic vibrator guidance system based on a field acquired trajectory

A system and method for performing seismic exploration with multiple acquisition systems is disclosed. The method includes configuring a first seismic source located outside of an exclusion zone and configuring a second seismic source located inside of the exclusion zone. The method further includes obtaining a first seismic dataset corresponding to a first seismic signal emitted by the first seismic source and obtaining a second seismic dataset corresponding to a second seismic signal emitted by the second seismic source. The method further includes combining the first and second datasets to create a complete dataset covering a survey area and creating a seismic image of a subsurface of the survey area.

System and method for performing seismic exploration with multiple acquisition systems

A system and method for generating simultaneous plural frequencies in seismic exploration is disclosed. The method includes configuring a seismic source to emit a seismic signal that includes multiple frequencies emitted substantially simultaneously. The method additionally includes identifying a plurality of frequencies to include in the seismic signal and determining an amplitude of the seismic signal. The method further includes obtaining a seismic dataset corresponding to the seismic signal emitted by the seismic source and creating a seismic image of a subsurface of a seismic survey area.

System and method for generating simultaneous plural frequencies in seismic exploration

A system and method for discontinuous spectrum emission in seismic exploration is disclosed. The method may include determining a minimum frequency to be emitted by a seismic source in a frequency spectrum. The method may further include selecting a maximum frequency to be emitted by the seismic source in the frequency spectrum. The method may include identifying a portion of the spectrum between the minimum frequency and the maximum frequency where a reduced signal will be emitted by the seismic source. The method may finally include emitting, by the seismic source, a seismic signal according to the frequency spectrum and the identified portion of the frequency spectrum with the reduced signal.

System and method for discontinuous spectrum emission in seismic exploration

The disclosed method includes receiving resulting signals emanating from a subterranean formation, wherein the resulting signals are caused by signals emitted from seismic sources. The method further includes dividing the resulting signals into a plurality of sub-samples. The method includes determining a frequency content of one or more of the sub-samples and assigning a weight to or more components of the frequency content of the sub-sample to produce a weighted frequency content of the sub-sample, wherein the assigned weight is based, at least in part, on an estimate of the amount of noise present in the frequency content of the sub-sample. The method further includes combining the weighted frequency contents of the sub-samples to produce a weighted sample. The method further includes determining one or more properties of the subsurface formation based, at least in part, on the weighted sample.

Subterranean formation monitoring using frequency domain weighted analysis

Apparatus, computer instructions and method for controlling an energy output of a source array to be used in a seismic survey for illuminating a subsurface. The method includes generating a model (&#x3b2;) based on up-going (U) and down-going (D) components of seismic waves generated by source elements that form the source array; calculating the amplitudes and phases of each source element based on the model (&#x3b2;); and driving the source array based on the calculated amplitudes and phases for the source elements so that a ghost generated by the source array is reduced at emission.

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Massy, France

Cécile Berron