2.5-D finite-element seismic modeling
- Petroleum Univ., Beijing (China)
2.5-Dimensional (2.5-D) seismic modeling deals with the propagation of 3-D seismic wavefield in 2-D media. The theory of 2.5-D wave propagation has its conceptual origin early, and Bleistein (1986) gives an excellent overview to earlier work. Liner (1991) gives a 2.5-D acoustic wave equation. Based on the equation presented by Liner, the author derives the correspondence finite element equation, develop the computer software of 2.5-D seismic modeling, and obtain good synthetic seismograms of 2.5-D modeling. In addition, by comparison of the result of 2-D and 2.5-D seismic modeling, it is indicated that the characteristics of 2-D wavefield is very different from that of 3-D wavefield. The result of this simulation is also compared to the analytical solution, which shows sufficient accuracy of the method. 2.5-D seismic modeling can correctly simulate the characteristics of 3-D seismic wave propagation and its computer CPU time is only a little longer than 2-D seismic modeling.
- OSTI ID:
- 93094
- Report Number(s):
- CONF-941015--
- Country of Publication:
- United States
- Language:
- English
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