Verfahren zum Herstellen eines synthetischen Seismogramms

摘要

A seismic processing method relating finely sampled data of earth formations, such as that obtained from borehole measurements, to substantially longer wavelength seismic data, such as that obtained from surface seismic surveys or the like, while improving the ease of manipulation and processing speed of seismic processing. In a preferred embodiment, a fine layer model having n layers is defined, with the properties of each fine layer corresponding to the properties of each of n sampling points. An equivalent model is constructed by defining m equivalent layers, where m is substantially smaller than n and the thickness of the thickest of the equivalent layers is substantially smaller than a predetermined dominant wavelength of a seismic signal. Equivalent formation properties are generated for each equivalent layer by combining the sampled formation properties of the fine layers within the respective equivalent layer, preferably in accordance with the equivalent medium theory. A synthetic seismogram is derived from the equivalent model and the seismic signal.