Method of controlling the quality of seismic data migration by using the generalized radon transform description
AssigneeSchlumberger Technology Corporation
InventorsChristophe Laurent, Di Cao
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Abstract
The present invention relates to a method of controlling the quality of seismic data that has been migrated using the generalized Radon transform, the method serving to pass between a seismic data space and a migrated image space, in which method a parameter table is calculated giving, for a seismic wave going from a point of the image to a source or a sensor, its path length, its travel time, and the angles of incidence of the wave at the beginning and at the end of the path, and in which correspondence is established between at least one zone of a first one of said two spaces and at least one zone of the second space, by using said parameter table to fill in a correspondence table QCimage.
Claims20
A method of processing seismic data comprising the steps of:
- a) filtering seismic data to generate a seismic data space;
- b) migrating the seismic data space using a point-by-point migration method to create a migrated data image;
- c) building a parameter table comprising parameters for at least one wave in the seismic data;
- d) using the parameter table to establish a correspondence between at least one zone in the seismic data space and at least one zone in the migrated image space;
- and
- e) using the correspondence to verify the quality of the migration.
A method of processing seismic data comprising the steps of:
- a) generating two spaces, wherein the first of the two spaces is generated by filtering the seismic data and the second of the two spaces is created by migrating the first space using a generalized Radon transform;
- b) pointing to a zone in one of the two spaces;
- c) projecting the pointed-to zone into the other of the two spaces;
- d) building a parameter table using ray tracing;
- e) using the parameter table to establish a correspondence between the pointed-to zone in the one of the two spaces and the projected pointed-to zone in the other of the two spaces;
- and
- f) using the correspondence to verify the quality of the migration.
A method of processing seismic data comprising the steps of:
- a) generating two spaces, wherein the first of two spaces is generated by filtering the seismic data and the second of the two spaces is created by migrating the first space using a generalized Radon transform;
- b) pointing to a zone in one of the two spaces;
- c) projecting the pointed-to zone into the other of the two spaces;
- wherein the pointed-to zone comprises a set (NZ) of intervals (Zi), each interval comprising a trace (T), a start of interval (td), and an end of interval (tf);
- d) building a parameter table using ray tracing for each trace (T) extending from a source (S) to a sensor (C);
- e) using the parameter table to establish a correspondence between the pointed-to zone in the one of the two spaces and the projected point-to- zone in the other of the two spaces, wherein the parameter table is used to build a correspondence table QCimage;
- and
- f) using the correspondence to verify the quality of the migration.
Dependencies are inferred from the claim text.