Finite‐difference simulation of elastic waves propagation in multiscale media on the base of local grid refinement

Guilbot, J.; Khaidukov, V.; Landa, E. A.; Reshetova, Galina; Tcheverda, Vladimir

doi:10.1190/1.3059297

Cited by 1 publication

(1 citation statement)

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“…This idea have been improved for elastic wave simulation (Jastram and Tessmer 1994;Pitarka 1999;Hayashi et al 2001;Wang et al 2001), but the flexibility and accuracy of these methods are insufficient since the spatial grid-size variation is limited to single direction and grid-size ratio is restricted under three. The variable-grid FD schemes then have been developed with grid-size variation in both spatial dimensions (Zhu et al 2007;Li et al 2008;Guilbot 2008). However, the computational efficiency is still not good enough because of unchanged time step.…”

Section: Introductionmentioning

confidence: 99%

Finite-difference modeling with variable grid-size and adaptive time-step in porous media

Liu

Yin

2014

Earthq Sci

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Forward modeling of elastic wave propagation in porous media has great importance for understanding and interpreting the influences of rock properties on characteristics of seismic wavefield. However, the finite-difference forward-modeling method is usually implemented with global spatial grid-size and time-step; it consumes large amounts of computational cost when small-scaled oil/ gas-bearing structures or large velocity-contrast exist underground. To overcome this handicap, combined with variable grid-size and time-step, this paper developed a staggered-grid finite-difference scheme for elastic wave modeling in porous media. Variable finite-difference coefficients and wavefield interpolation were used to realize the transition of wave propagation between regions of different grid-size. The accuracy and efficiency of the algorithm were shown by numerical examples. The proposed method is advanced with low computational cost in elastic wave simulation for heterogeneous oil/gas reservoirs.

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