Abstract：
In tomographic statics seismic data processing, it is crucial to determine an optimum base for a near-surface model. In this paper, we consider near-surface model base determination as a global optimum problem. Given information from uphole shooting and the first-arrival times from a surface seismic survey, we present a near-surface velocity model construction method based on a Monte-Carlo sampling scheme using a layered equivalent medium assumption. Compared with traditional least-squares first-arrival tomography, this scheme can delineate a clearer, weathering-layer base, resulting in a better implementation of datuming correction. Examples using synthetic and field data are used to demonstrate the effectiveness of the proposed scheme.
YANG Kai,ZHOU Xing,LI Hui et al. Near-surface velocity model construction based on a Monte-Carlo scheme[J]. APPLIED GEOPHYSICS, 2012, 9(4): 475-482.
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2012, Vol. 9 
