Monitoring of source signature directivity in seismic systems
AssigneeCgg Services SAS
InventorsJulie SVAY, Yuan NI, Cheikh NIANG
Life of this patent
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Abstract
Methods and systems for generating a stability indicator associated with source directivity between shots and based on a signature are described. The stability indicator is computed by comparing a reference directivity cube to a source directivity cube using a partitioned intensity uniformity (PIU) metric. In another aspect, the stability indicator can be normalized to produce a scalar stability indicator expressed in percentage.
Claims20
A method for monitoring the stability of source directivity between shots, based on an image registration metric of a source signature and generating a stability indicator, said method comprising:
- computing a current source directivity cube;
- selecting a portion of said current source directivity cube for analysis;
- computing a reference directivity cube within said portion;
- computing a partitioned intensity uniformity (PIU) metric based on said reference directivity cube and said portion of said source directivity cube;
- using said PIU metric to generate said stability indicator;
- and
- outputting said stability indicator.
A method for generating a stability indicator, said method comprising:
- computing a source directivity cube and a reference directivity cube;
- computing a partitioned intensity uniformity (PIU) metric using at least a portion of the source directivity cube and the reference directivity cube;
- using said PIU metric to generate said stability indicator;
- and
- outputting said stability indicator.
A system for generating a stability indicator based on an image registration metric of a source signature associated with seismic data, system comprising:
- seismic data;
- one or more processors configured to execute computer instructions and a memory configured to store said computer instructions wherein said computer instructions further comprise:
- a cube component for generating directivity cubes;
- a partitioned intensity uniformity (PIU) component for generating a PIU metric based on said directivity cubes;
- a stability indicator component for comparing said PIU metric to a predetermined threshold value and generating a stability indicator;
- and
- an output component for outputting said stability indicator.
Dependencies are inferred from the claim text.