Compagnie Generale De Geophysique

Cgg Veritas Sa

Cggveritas Services S.a.

Seabed Geosolutions B.v.

Philippe Herrmann

Risto Siliqi

Gilles Lambare

Patrice Guillaume

Nicolas Bousquie

Eric Suaudeau

Halim Dariu

A marine node for recording seismic waves underwater. The node includes a spherical body made of a material that has a density similar to a density of the water so that the body is buoyant neutral; a first sensor located in the body and configured to record three dimensional movements of the node; a second sensor located in the body and configured to record pressure waves propagating through the water; and one or more cables connected to the first and second sensors and configured to exit the body to be connected to an external device. The body is coupled to the water.

Water-coupled underwater node for seismic surveys

The invention relates to a method of seismic data processing, wherein the data includes a set of seismic traces, with each trace including a signal that has been recorded by a sensor after having been propagated in a subsurface area, with the signal being defined by an amplitude as a function of time, including the steps of:

Method of seismic data processing

The invention relates to a method of processing seismic data, the said seismic data comprising a gather of seismic traces organized according to one or several acquisition parameters, comprising the steps of:

Seismic data processing method for RMO picking

The invention relates to a method of processing seismic data, the said seismic data comprising a gather of seismic traces organised according to one or several acquisition parameters, comprising the steps of:

The invention relates to an estimate of the seismic illumination fold (x, p) in the migrated 3D domain at an image point x, for a dip of vector p characterized in that the illumination fold I (z, p; s, r) is estimated for each (source s, receiver r) pair in the seismic survey, by applying the following steps:&#x2014;determination of the reflection travel time t(&#xb7;x(p);s&#xb7;r) from the source s to the specular reflection point z, on the plane reflector passing through the image point x and perpendicular to the dip vector p, and then return to the reflector r; starting from the diffraction travel time t(&#xb7;z;s&#xb7;r) from the source to the said image point x and then return to the reflector r;&#x2014;incrementing the said illumination fold I (X, p; s, r) related to the said (source s, receiver r) pair as a function of the difference between the diffraction travel time t(x;s,r) and the reflection travel time tr(xr(p)issr).

Method of estimating the illumination fold in the migrated domain

The invention relates to a method of processing seismic data comprising a gather of seismic traces organised according to one or several acquisition parameters, each trace comprising a seismic signal defined by an amplitude as a function of time or depth, the method comprising the steps of: a) defining a base of elementary functions of the acquisition parameter(s), b) orthogonalising said elementary functions so as to define a base of orthogonal elementary functions c) for a given time or at a given depth, determining combination coefficients defining a combination of the orthogonal elementary functions, said combination being an estimator of a variation in the amplitude of the seismic signal as a function of the acquisition parameter(s).

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Villepreux, France

Philippe Herrmann