Reverse time migration noise removal using a depth-dependent wavenumber filter
AssigneeAramco Services Company
InventorsHong Liang, Houzhu Zhang
Life of this patent
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Abstract
Examples of methods and systems are disclosed. The methods may include obtaining a seismic data regarding a subsurface region of interest, wherein the seismic data comprises a plurality of time-space waveforms. The methods may also include obtaining a seismic velocity model. The methods may further include determining a migrated seismic image based on the plurality of time-space waveforms and the seismic velocity model. The method may still further include generating a filtered seismic image by applying a depth-dependent attenuation operator to the migrated seismic image and determining a drilling target in the subsurface region based on the filtered seismic image.
Claims20
A method, comprising:
- obtaining a seismic data regarding a subsurface region of interest, wherein the seismic data comprises a plurality of time-space waveforms;
- obtaining a seismic velocity model;
- determining a migrated seismic image based on the plurality of time-space waveforms and the seismic velocity model;
- generating a filtered seismic image by applying a depth-dependent attenuation operator to the migrated seismic image;
- and
- determining a drilling target in the subsurface region based on the filtered seismic image.
A non-transitory computer-readable medium comprising computer-executable instructions stored thereon that, when executed on a processor, cause the processor to perform:
- obtaining seismic data regarding a subsurface region of interest, wherein the seismic data comprises a plurality of time-space waveforms;
- obtaining a seismic velocity model;
- determining a migrated seismic image based on the plurality of time-space waveforms and the seismic velocity model;
- generating a filtered seismic image by applying a depth-dependent attenuation operator to the migrated seismic image;
- and
- determining a drilling target in the subsurface region based on the filtered seismic image.
A system, comprising:
- a seismic acquisition system configured to record seismic data regarding a subsurface region of interest, wherein the seismic data comprises a plurality of time-space waveforms;
- and
- a seismic processor configured to receive the seismic data and to:
- obtain a seismic velocity model,
- determine a migrated seismic image based on the plurality of time-space waveforms and the seismic velocity model,
- generate a filtered seismic image by applying a depth-dependent attenuation operator to the migrated seismic image, and
- determine a drilling target in the subsurface region based on the filtered seismic image.
Dependencies are inferred from the claim text.