Robust Q estimation using surface seismic data

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Authors

Joakim Oscar Blanch 

Abstract

Direct wave arrivals are the most robust signals to determine velocity and consequently they have been used for almost a century in hydrocarbon exploration. The reason is simple as the arrivaltime is explicitly available and provide a direct measurement of the average velocity of the sub-surface ray-path. These signals have not been extensively used to estimate attenuation or Q. One reason may be that very few robust methods have been developed to estimate Q from these signals. The common method to estimate Q using data acquired from VSP measurements is relying on spectral ratios. This method is in general quite reliable whenever there is a signal that has a reasonably broad spectral support. I will show how a variation on the spectral ratio method that provides equal results while more robust and how it can be adapted for surface seismic measurement.

DOI

https://doi.org/10.31223/osf.io/zpx2w

Subjects

Applied Mathematics, Computational Engineering, Earth Sciences, Engineering, Geophysics and Seismology, Numerical Analysis and Computation, Physical Sciences and Mathematics

Keywords

seismic Q inversion

Dates

Published: 2020-07-30 09:52

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License

GNU Lesser General Public License (LGPL) 2.1

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