Translations:Layer-cake model/5/en
A synthetic seismogram is an artificial seismic-reflection record made by assuming that a wavelet travels through an assumed earth model (Anstey, 1960[1]; Kelly et al., 1976[2]; Shtivelman and Loewenthal, 1989[3]). A 1D synthetic seismogram (without multiple reflections) can be obtained by convolving a wavelet with a reflectivity function. A reflectivity function consists of a series of spikes that indicates the sign and magnitude of the reflection coefficient of each interface. The reflectivity usually is calculated for normal-incidence wave motion on the basis of changes in velocity and in density. Often, only velocity changes are considered because density information frequently is unavailable. Alternatively, some empirical relationship between density and velocity can be assumed.
- ↑ Anstey, N. A., 1960, Attacking the problems of the synthetic seismogram: Geophysical Prospecting, 8, 242–259.
- ↑ Kelly, K., R. Ward, S. Treitel, and R. Alford, 1976, Synthetic seismograms, a finite difference approach: Geophysics, 41, 2–27.
- ↑ Shtivelman, V., and D. Loewenthal, 1989, Construction of the generalized one-dimensional synthetic seismograms by a three-step extrapolation procedure: Geophysics, 54, no. 8, 1050–1053.