Joint full wavefield inversion of P-wave velocity and attenuation using an efficient first order optimization
US10459096B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2017 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Feb 2, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F17/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for iteratively inverting seismic data to jointly infer a model for at least P-wave velocity and attenuation parameters of the subsurface, the method including: jointly inverting the P-wave velocity and attenuation parameters with an iterative visco-acoustic full wavefield inversion process, wherein the iterative visco-acoustic full wavefield inversion process includes computing a gradient of an objective function, the objective function measuring a misfit between all or part of the seismic data and corresponding model-simulated seismic data; for each of the P-wave velocity and attenuation parameters, computing a search direction in model space from the gradient; determining line search step sizes α and β for the search directions for the P-wave velocity and attenuation parameters, respectively, wherein a ratio of the step sizes is a function of the P-wave velocity parameter; and using the step sizes α and β and the search directions for each of the P-wave velocity and attenuation parameters, computing a new search direction in model space, then performing a line search along the new search direction to arrive at a new step size, and using the new step size and the new sea…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.