Method of processing seismic data acquired by means of multi-component sensors
AssigneeCggveritas Services SA
InventorBruno Gratacos
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Abstract
The invention relates to a method of processing seismic data acquired by means of a sensor having at least three geophone components, characterized in that estimators are determined which are combinations of these components making it possible to isolate the various data depending on whether they correspond to propagation with reflection or with conversion. The estimators find application in particular for determining a sensor reconstruction according to which the operators to be applied to the various components of the sensor are determined in such a way as to minimize the deviation between reference data and data obtained by applying the estimators to the sensor reconstruction, the operators thus determined being applied to the data acquired.
Claims11
A method of processing seismic data corresponding to first arrival waves and to waves reflected or converted by the seismic horizons, the seismic data being acquired by an omnitilt sensor having at least three geophone components with an angular orientation φψ, wherein estimators are determined which are combinations of these components, wherein various data are isolated, through the estimators, depending on whether they correspond to propagation with reflection or with conversion by the seismic horizons, and wherein operators to be applied to the various components of the sensor are determined for determining a sensor reconstruction, the operators being those that minimize a deviation between reference data and data obtained by applying the estimators to the sensor reconstruction, the operators thus determined being applied to the data acquired,
- said operators used to reconstruct the orientation of at least one geophone of the omnitilt sensor along at least one desired axis.
A method of processing seismic data acquired by means of a sensor having at least three geophone components, determining estimators, wherein said estimators are determined which are combinations of these components, wherein various data are isolated, through the estimators, depending on whether they correspond to propagation with reflection or with conversion, said estimators used to reconstruct the orientation of at least one geophone along at least one desired axis.
A method of processing seismic data, at least a portion of said data comprises first arrival waves and waves reflected or converted by the seismic horizons, the seismic data acquired by an omnitilt sensor having at least three geophone components, each geophone component has an angular orientation φψ, said method comprises the steps of:
- determining estimators, wherein said estimators comprises combinations of said geophone components;
- isolating at least a segment of said data using said estimators, said isolation depends on whether said portion of said segment corresponds to propagation with reflection or with conversion by the seismic horizons;
- determining operators for obtaining a sensor reconstruction, wherein said operators are determined to minimize the deviation between reference data and data obtained by applying the estimators to the sensor reconstruction;
- and
- applying said determined operators to the acquired seismic data, said application used to reconstruct the orientation of at least one geophone along at least one desired axis.
Dependencies are inferred from the claim text.