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US 9,310,503 B2Granted
Methods to process seismic data contaminated by coherent energy radiated from more than one source
AssigneeWesternGeco L.L.C.
InventorsSusanne Rentsch, Wouter Gerrit Brouwer
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Abstract
This invention discloses methods of processing data using a computer to separate out geophysical exploration response at receivers corresponding to one source among many sources by determining at least one spatio-temporal variant directional propagation attribute of the responses at receivers corresponding to the one source and by decomposition or filtering process using the determined attribute.
Claims16
A method comprising:
- receiving data representing energy sensed by receivers in response to energy being produced by a plurality of seismic sources;
- determining a dependence of at least one directional propagation attribute of the sensed energy on at least one of time and space;
- processing data in a processor-based machine to sort the data based at least in part on the determined dependence and attributing a portion of the sensed energy to a given seismic source of the plurality of seismic sources based at least in part on the sorted data;
- and
- processing the sorted data to determine information about a geological formation,
- wherein processing the data in the processor-based machine to sort the data based at least in part on at least one directional propagation attribute and attributing a portion of the sensed energy to the given seismic source of the plurality of seismic sources comprises:
- using a matching pursuit-based technique to determine the at least one directional propagation attribute;
- or
- determining the at least one directional propagation attribute based on an inline and a crossline slowness.
6 more elements
A system comprising:
- data storage storing data representing energy sensed by the receivers in response to energy being produced by a plurality of seismic sources;
- and
- a processor to determine a dependence of at least one directional propagation attribute of the sensed energy on at least one of time and space, sort the data based at least in part on the determined dependence, and attribute a portion of the sensed energy to a given seismic source of the plurality of seismic sources based at least in part on the sorted data,
- wherein said at least one processor processes the sorted data to determine information about a geological formation and the processor:
- uses a matching pursuit-based technique to determine the at least one directional propagation attribute;
- or
- determines the at least one directional propagation attribute based on an inline and a crossline slowness.
4 more elements
Dependencies are inferred from the claim text.