Loading patent…
AssigneeExxonMobil Upstream Research Company
InventorsJerome R. Krebs, John E. Anderson, Ramesh Neelamani, Charlie Jing, David Hinkley, Thomas A. Dickens, Christine E. Krohn, Peter Traynin
Estimating the term…
Method for reducing the time needed to perform geophysical inversion by using simultaneous encoded sources in the simulation steps of the inversion process. The geophysical survey data are prepared by encoding (3) a group of source gathers (1), using for each gather a different encoding signature selected from a set (2) of non-equivalent encoding signatures. Then, the encoded gathers are summed (4) by summing all traces corresponding to the same receiver from each gather, resulting in a simultaneous encoded gather. (Alternatively, the geophysical data are acquired from simultaneously encoded sources.) The simulation steps needed for inversion are then calculated using a particular assumed velocity (or other physical property) model (5) and simultaneously activated encoded sources using the same encoding scheme used on the measured data. The result is an updated physical properties model (6) that may be further updated (7) by additional iterations.
A computer-implemented method for inversion of measured geophysical data to determine a physical properties model for a subsurface region, comprising:
A computer implemented method for iterative inversion of measured geophysical data to determine a physical properties model for a subsurface region, comprising simultaneously simulating encoded gathers of the measured geophysical data, each gather being encoded with a different encoding signature selected from a set of non-equivalent encoding signatures, wherein in some or all of the iterations, different encoding signatures are used compared to the preceding iteration.
Dependencies are inferred from the claim text.