Modeling and field studies show that sand dunes exhibit vertical velocity profiles. Ignoring this property in processing seismic data collected over sand dunes can lead to errors. In this study, I present a V(z) function derived from Hertz-Mindlin and Gassmann theories and use it to calculate the refraction static correction in a sand dune. I then compare this static correction to that calculated while assuming a vertically homogenous sand dune. Modeling results show that the absolute error due to ignoring the dune’s vertical velocity profile does not exceed 6% for sand dunes with porosities, water saturations, and thicknesses ranging 0.2-0.7, 0-0.9, and 0-200 m, respectively.


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