US 8,300,498 B2 · Method for dynamic aperture determination for three-dimensional surface-related multiple elimination

Abstract

Dips are calculated for a series of sets of adjacent multiple contribution traces, from seismic data representative of subsurface formations, in the vicinity of a boundary of an aperture of a multiple contribution gather, the seismic data acquired by deploying a plurality of seismic sensors proximate an area of the earth's subsurface to be evaluated, the seismic sensors generating at least one of an electrical and optical signal in response to seismic energy. The boundary of the aperture of the multiple contribution gather is recursively extended, based on the calculated dips. Multiple contribution traces in the multiple contribution gather with the extended aperture boundary are stacked to generate predicted multiple traces. The predicted multiple traces are subtracted from the seismic data to generate surface-related multiple attenuated data useful for imaging the subsurface formations.

Claims15

Dependent claims

A method for transforming seismic data into noise-attenuated data, comprising:

predicting multiple traces in seismic data representative of subsurface formations by the following:
calculating dips for a series of sets of adjacent multiple contribution traces, from seismic data acquired by deploying a plurality of seismic sensors proximate an area of the earth's subsurface to be evaluated, the seismic sensors generating at least one of an electrical and optical signal in response to seismic energy, in the vicinity of a boundary of an aperture of a multiple contribution gather;
recursively extending the boundary of the aperture of the multiple contribution gather, based on the calculated dips;
and
stacking multiple contribution traces in the multiple contribution gather with the extended aperture boundary to generate predicted multiple traces;
and
subtracting the predicted multiple traces from the seismic data to generate surface-related multiple attenuated data useful for imaging the subsurface formations.

4 more elements

A method for geophysical prospecting, comprising:

disposing a marine seismic streamer in a body of water;
responsive to signals recorded at receivers in the marine seismic streamer, calculating seismic traces representing physical wavefields traveling in the body of water incident on the receivers;
correcting for surface-related multiples by transforming the seismic traces into predicted multiple traces, the transforming comprising:
calculating dips for a series of sets of adjacent multiple contribution traces in the vicinity of a boundary of an aperture of a multiple contribution gather;
and
recursively extending the boundary of the aperture of the multiple contribution gather, based on the calculated dips;
stacking multiple contribution traces in the multiple contribution gather with the extended aperture boundary to generate predicted multiple traces;
and
recording the predicted multiple traces,
subtracting the predicted multiple traces from the seismic traces to generate surface-related multiple attenuated traces.

7 more elements

A computer readable medium with a computer program stored thereon, the program having logic operable to cause a programmable computer to perform steps comprising:

calculating dips for a series of sets of adjacent multiple contribution traces in the vicinity of a boundary of an aperture of a multiple contribution gather;
and
recursively extending the boundary of the aperture of the multiple contribution gather, based on the calculated dips.

Dependencies are inferred from the claim text.

Method for dynamic aperture determination for three-dimensional surface-related multiple elimination

Life of this patent

Method for dynamic aperture determination for three-dimensional surface-related multiple elimination

Life of this patent

Abstract

Claims15