Relief surface seismic wave forward simulation in desert area and data processing

doi:10.7523/j.issn.2095-6134.2014.06.011

Abstract

Abstract:

Considering the complex sand dune near-surface conditions in desert area,we carry out the forward simulation and data processing study. We present seismic wave numerical simulating algorithm and key parameters used for relief surface case. We introduce the random cave medium to depict the incompact sand dune structure,fill the practical air velocity above the surface,and simulate the seismic data acquisition in desert area. We take practical seismic data in desert area as example and use theoretical model to do the data processing and wave field analysis. The results show that the sand dunes' incompact structure in desert area is the main cause for the low S/N ratio in the pre-stack gather and stacking section. The pre-stack time migration method effectively improves the quality of the migration section and common reflection point gather by the weighted diffraction summation function,which provides certain significance for relief surface practical seismic data processing in desert area.

Key words: desert surface, forward simulation, seismic data processing, signal and noise ratio, data analysis

CLC Number:

P631.4

CHEN Keyang, WU Peixi, ZHANG Dexin, YANG Wei. Relief surface seismic wave forward simulation in desert area and data processing[J]. , 2014, 31(6): 799-805.

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