Abstract：Thin-bed thickness can be quantitatively ealculated by using amplitucle information when the seismic waves were recorded in single surface seismic-geological condition and stable shot-receiving condition. However, seismic waves are rarely recorded on such ideal conditions. A new methods for calculating thin-bed thickness witn the use of frequeney information is grogosed as a result of thin-bed model research. This method uses amplitude spectrum values of low freqtaeney contents in seisanic frequency spectrum to determine bed thickness, and needs no special requiretrsent for seismic amplitude. The thin-bed thickness error is minutely analysed which may be caused by thin interbdding and different wavelets. This maethod is proverb feasible.
