Pseudo-offset migration
AssigneePGS Americas, Inc.
InventorsWeizhong Wang, Long Don Pham
Life of this patent
Estimating the term…
Abstract
A method of migration of a seismic data is disclosed. The data include a data point having an input source location, an input receiver location, and a scatter point associated therewith. The method includes determining a projected source location, and determining a projected receiver location. The seismic data point is mapped from an input travel time to a projected travel time. A pseudo-offset is determined based on the projected travel time and the data point is mapped to the pseudo-offset.
Claims41
A method of migrating an input seismic data point having an input source location and an input receiver location, a scatter point, and an image location associated therewith, the method comprising:
- determining a pseudo-offset, the pseudo offset including a pseudo source location and a pseudo receiver location;
- and
- mapping the seismic data point to the image location based at least in part on the pseudo-offset.
A method of migration of a seismic data point having an input source location, an input receiver location, and a scatter point associated therewith, the method comprising:
- determining a projected source location;
- determining a projected receiver location;
- mapping the seismic data point from an input travel time to a projected travel time;
- determining a pseudo-offset based on the projected travel time;
- and
- mapping the data point to the pseudo-offset.
A method for performing velocity analysis on a seismic gather, the method comprising:
- computing a moveout travel time based on an initial model;
- computing an intermediate travel time;
- mapping the gather from the moveout travel time to the intermediate travel time;
- and
- scanning for velocities based on the intermediate travel time.
A system for migrating an input seismic data point having an input source location and an input receiver location, a scatter point, and an image location associated therewith, the system comprising:
- means for determining a pseudo-offset the pseudo offset including a pseudo source location and a pseudo receiver location;
- and
- means for mapping the seismic data point to the image location based at least in part on the pseudo-offset.
A system for migration of a seismic data point having an input source location, an input receiver location, and a scatter point associated therewith, the system comprising:
- means for determining a projected source location;
- means for determining a projected receiver location;
- means for mapping the seismic data point from an input travel time to a projected travel time;
- means for determining a pseudo-offset based on the projected travel time;
- and
- means for mapping the data point to the pseudo-offset.
A system for performing velocity analysis on a seismic gather, the system comprising:
- means for computing a moveout travel time based on an initial model;
- means for computing an intermediate travel time;
- means for mapping the gather from the moveout travel time to the intermediate travel time;
- and
- means for scanning for velocities based on the intermediate travel time.
Dependencies are inferred from the claim text.