The small-scale forward modeling method for large models based on the wave equation. (2nd December 2015)

• Record Type: Journal Article
• Authors: Pu, Yitao; Yin, Xingyao; Cao, Danping; Zhang, Chong
• Is Part Of: Journal of geophysics and engineering. Volume 12:Number 6(2015:Dec.)
• Page Start: 988
• Page End: 995
• Publication Date: 2015-12-02
• Subjects: small-scale modeling -- variable grids method -- PML boundary -- acoustic wave; Geophysics -- Periodicals; Prospecting -- Geophysical methods -- Periodicals; Engineering -- Periodicals; 622.1505
• DOI: 10.1088/1742-2132/12/6/988
• Languages: English
• ISSNs: 1742-2132

Abstract

Abstract: The small-scale modeling of an underground geological model can avoid the equivalent large-scale assumptions and show the seismic reflection characteristics more precisely. Considering the large number of perfectly matched layer (PML) boundaries in small-scale modeling of large models, we analyze the absorption effect of the PML boundary in different spatial spacing, and apply variable-grid technology to small-scale seismic modeling. Using small grids to compute the model region and large grids to compute the PML boundary, we successfully reduce the amount of PML boundary layers in small-scale seismic modeling. This method can reduce data storage and improve computational efficiency dramatically.