Full waveform inversion of seismic data using partial match filtering
AssigneeCgg Services SAS
InventorsJames COOPER, Andrew RATCLIFFE, Gordon POOLE
Life of this patent
Estimating the term…
Abstract
Methods and apparatuses for seismic exploration of an underground structure obtain improved images by integrating partial match filtering in an FWI. Filtered (auxiliary) data replaces one of the observed data and the synthetic data in the FWI's objective function to avoid cycle skipping.
Claims20
A method for seismic exploration of an underground structure, the method comprising:
- obtaining recorded data which was acquired by probing the underground structure using seismic waves;
- generating synthetic data corresponding to the recorded data, using a model of the underground structure;
- computing a partial match filter, PMF, partially matching the recorded data and the synthetic data;
- generating auxiliary data using the PMF and one of the synthetic and recorded data;
- and
- updating the model based on the auxiliary data,
- wherein the updated model is useable to locate natural resources in the explored underground structure.
An apparatus for seismic exploration on an underground structure, the apparatus comprising:
- an interface configured to obtain recorded data which was acquired during a survey of the underground structure using seismic waves;
- and
- a data processing unit connected to the interface and configured
- to generate synthetic data corresponding to the recorded data, using a model of the underground structure;
- to compute a partial match filter, PMF, partially matching the recorded data and the synthetic data;
- to generate auxiliary data using the PMF and one of the synthetic and recorded data;
- and
- to update the model based on the auxiliary data,
- wherein the updated model is useable to locate natural resources in the explored underground structure.
A computer readable recording medium non-transitorily storing executable codes that when executed by a computer make the computer perform a method for seismic exploration of an underground structure, the method comprising:
- obtaining recorded data which was acquired by probing the underground structure using seismic waves;
- generating synthetic data corresponding to the recorded data, using a model of the underground structure;
- computing a partial match filter, PMF, partially matching the recorded data and the synthetic data;
- generating auxiliary data using the PMF and one of the synthetic and recorded data;
- and
- updating the model based on the auxiliary data,
- wherein the updated model is useable to locate natural resources in the explored underground structure.
Dependencies are inferred from the claim text.