The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2014
Filed:
Jan. 30, 2012
Partha S. Routh, Katy, TX (US);
Spyridon K. Lazaratos, Houston, TX (US);
Anatoly Baumstein, Houston, TX (US);
Ivan Chikichev, Houston, TX (US);
KE Wang, Sugar Land, TX (US);
Partha S. Routh, Katy, TX (US);
Spyridon K. Lazaratos, Houston, TX (US);
Anatoly Baumstein, Houston, TX (US);
Ivan Chikichev, Houston, TX (US);
Ke Wang, Sugar Land, TX (US);
ExxonMobil Upstream Research Company, Houston, TX (US);
Abstract
Method for speeding up iterative inversion of seismic data () to obtain a subsurface model (), using local cost function optimization. The frequency spectrum of the updated model at each iteration is controlled to match a known or estimated frequency spectrum for the subsurface region, preferably the average amplitude spectrum of the subsurface P-impedance. The controlling is done either by applying a spectral-shaping filter to the source wavelet () and to the data () or by applying the filter, which may vary with time, to the gradient of the cost function (). The source wavelet's amplitude spectrum (before filtering) should satisfy D(f)=fI(f)W(f), where f is frequency, D(f) is the average amplitude spectrum of the seismic data, and I(f) is the average amplitude spectrum for P-impedance in the subsurface region () or an approximation thereof.