CPC G01V 1/301 (2013.01) [G01V 1/282 (2013.01); G01V 1/303 (2013.01); G01V 2210/614 (2013.01); G01V 2210/64 (2013.01); G01V 2210/679 (2013.01)] | 15 Claims |
1. A method for seismic exploration using a visco-acoustic full wave inversion, FWI, the method comprising:
obtaining seismic data for an explored subsurface formation;
determining an initial velocity model associated with the explored subsurface formation;
performing a first visco-acoustic FWI to obtain a quality factor, Q, model, using the initial velocity model;
performing at least one second visco-acoustic FWI to update the velocity model and the Q model using a frequency-dependent velocity to reduce cross-talk between Q and velocity; and
using a combination of the velocity model and the Q model to identify natural resources in the explored subsurface formation and/or to plan an exploitation thereof,
wherein a reference velocity, which corresponds to a reference frequency and is based on the initial velocity model, is input to the first and the at least one second visco-acoustic FWI, and
the first visco-acoustic FWI is performed on a subset of the seismic data in a frequency band different from the reference frequency so as to minimize phase differences.
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