3D elastic wave equation forward modeling based on the precise integration method

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Abstract The Finite Difference (FD) method is an important method for seismic numerical simulations. It helps us understand regular patterns in seismic wave propagation, analyze seismic attributes, and interpret seismic data. However, because of its discretization, the FD method is only stable under certain conditions. The Arbitrary Difference Precise Integration (ADPI) method is based on the FD method and adopts an integration scheme in the time domain and an arbitrary difference scheme in the space domain. Therefore, the ADPI method is a semi-analytical method. In this paper, we deduce the formula for the ADPI method based on the 3D elastic equation and improve its stability. In forward modeling cases, the ADPI method was implemented in 2D and 3D elastic wave equation forward modeling. Results show that the travel time of the reflected seismic wave is accurate. Compared with the acoustic wave field, the elastic wave field contains more wave types, including PS- and PP- reflected waves, transmitted waves, and diffracted waves, which is important to interpretation of seismic data. The method can be easily applied to elastic wave equation numerical simulations for geological models.

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	DUAN Yu-Ting
	HU Tian-Yue
	YAO Feng-Chang
	ZHANG Yan

Key words： Arbitrary difference precise integration method elastic waves wave equation seismic numerical simulation

Received: 2011-04-22;

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This research is supported by the National Science and Technology Major Project of China (Grant No. 2011ZX05004-003, 2011ZX05014-006-006), the National Key Basic Research Program of China (Grant No. 2013CB228602), and the Natural Science Foundation of China (Grant No. 40974066).

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DUAN Yu-Ting,HU Tian-Yue,YAO Feng-Chang et al. 3D elastic wave equation forward modeling based on the precise integration method[J]. APPLIED GEOPHYSICS, 2013, 10(1): 71-78.

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