Method and system for more efficient checkpointing strategy in cross correlating (316) a
forward (328) and backward (308) propagated wave such as in migrating (326) or inverting …

Method for reducing the time needed to perform geophysical inversion by using
simultaneous encoded sources in the simulation steps of the inversion process. The …

Methods and systems for processing microseismic waveforms. The methods and systems
provide determining a measure of waveform fit in the frequency-domain comprising …

A method, including: obtaining a velocity model generated by an acoustic full wavefield
inversion process; generating, with a computer, a variable Q model by applying pseudo-Q …

Method for simultaneous full-wavefield inversion of gathers of source (or receiver) encoded
(30) geophysical data (80) to determine a physical properties model (20) for a subsurface …

Method for simultaneous full-wavefield inversion of gathers of source (or receiver) encoded
geophysical data to determine a physical properties model for a subsurface region …

Method for simultaneous full-wavefield inversion of gathers of source (or receiver) encoded
geophysical data to determine a physical properties model (118) for a subsurface region …

Method for converting seismic data to obtain a subsurface model of, for example, bulk
modulus or density. The gradient of an objective function is computed (103) using the …

An improved method for reducing the accuracy requirements on the starting model when
performing multi-scale inversion of seismic data (65) by local objective function optimization …

Method for acquiring, at reduced acquisition cost, seismic data using simultaneous, field-
encoded sources in the field (702), and then constructing pseudo source-records (703) that …