Baker Hughes Corporation

Rdsp I L.p.

Rock Solid Images, Inc.

Sven Treitel

Otto N Fanini

M Turhan Taner

Neil Hargreaves

Eric Withjack

A computer-implemented method for processing a seismic trace of a subterranean region comprising: (a) deriving a seismic wavelet for a time-window of seismic trace; (b) generating a model for the subterranean region corresponding to that time-window comprising a plurality of seismic reflectors by comparing the seismic wavelet with the time-window of the seismic trace to identify locations for the seismic reflectors, wherein the locations of the seismic reflectors are subject to a separation constraint requiring neighboring seismic reflectors to be separated by at least a minimum separation threshold which is greater than a separation corresponding to a sampling interval for the seismic trace; (c) defining a model seismic wavelet having a model seismic wavelet amplitude spectrum with a frequency bandwidth which is greater than that of the seismic wavelet amplitude spectrum determined for the time-window of the seismic trace; and (d) generating a model of the time-window of the seismic trace for the subterranean region based on the plurality of seismic reflectors of the model for the subterranean region corresponding to that time window and the model seismic wavelet.

Geophysical surveying

A method is disclosed for calculating the quality factor Q from a seismic data trace. The method includes calculating a first and a second minimum phase inverse wavelet at a first and a second time interval along the seismic data trace, synthetically dividing the first wavelet by the second wavelet, Fourier transforming the result of the synthetic division, calculating the logarithm of this quotient of Fourier transforms and determining the slope of a best fit line to the logarithm of the quotient.

Method for determining formation quality factor from seismic data

Time lapse seismic measurements of a laminated reservoir including sands and shales are processed to determine changes in the laminated reservoir. An initial petrophysical model is obtained at a wellbore from measurements made with a multicomponent resistivity logging tool. Changes in the amplitude versus offset behavior of the reflections from the top of the reservoir are indicative of changes in fluid saturation and/or formation pressure.

Growing community of inventors

Tulsa, OK, United States of America

Sven Treitel