Tomographically enhanced full wavefield inversion
US10698126B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2017 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Apr 30, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A computer-implemented method for updating a physical properties model of a subsurface region in an iterative inversion of seismic data using a gradient of a cost function that compares the seismic data to model-simulated data, said method comprising: obtaining a contrast model of a subsurface physical parameter that is sensitive to data dynamics and a kinematic model of a subsurface physical parameter; determining a gradient of a cost function using the contrast model and the kinematic model, wherein the cost function compares seismic data to model-simulated data; updating the kinematic model using a search direction derived from the gradient; adapting the contrast model according to an update to the kinematic model performed in the updating step; iteratively repeating the determining, updating, and adapting steps until a predetermined stopping criteria is reached, and generating a subsurface image from a finally updated kinematic model; and using the subsurface image to prospect for hydrocarbons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.