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US 9,069,091 B2Granted
Generating sweep sequences
AssigneeWesternGeco L.L.C.
InventorsKambiz Iranpour, Staffan Eriksson, Christer Hoerlin
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Abstract
A technique includes generating one or more sweep sequences for one or more seismic vibrators for a seismic survey and evaluating a cost for the sequence(s). The technique includes perturbing the sequence(s) and continuing the evaluation and perturbing until the cost is within a limit or a maximum number of perturbations is reached.
Claims8
A method comprising:
- generating a plurality of broadband pseudorandom sweep sequences for seismic vibrators for a seismic survey;
- perturbing the sequences to provide a candidate perturbed state of the sequences;
- evaluating a cost for the perturbed state of the sequences;
- selectively reverting the sequences back to a previous state or accepting the candidate perturbed state based at least in part on the cost;
- continue perturbing, evaluating and selectively reverting or accepting until the cost is within a limit or a maximum number of perturbations is reached;
- and
- actuating a plurality of vibrators, each following one of the sweep sequences.
4 more elements
A method comprising:
- generating broadband pseudorandom sweep sequences for a-seismic vibrators for a seismic survey;
- perturbing the sequences to provide a candidate perturbed state of the sequences using a simulated annealing method;
- evaluating a cost for the perturbed state of the sequences;
- selectively reverting the sequences back to a previous state or accepting the candidate perturbed state based at least in part on the cost;
- continue perturbing, evaluating and selectively reverting or accepting until the cost is within a limit or a maximum number of perturbations is reached;
- and
- actuating the vibrators following the sweep sequence.
4 more elements
Dependencies are inferred from the claim text.