Quality control methods of synthetic seismograms

Quality control(QC) of synthetic seismograms is the key for subtle horizon interpretation.Based on the analysis of the synthetic seismogram principle,this paper suggests three steps of quality control:① exact calculation of reflect coefficients from well logging data;② extracting a wavelet which is consistent with seismic well side trace in spectrum,waveform and phase;and ③ based on high precision velocity field,matching synthetic seismograms with seismic well side trace according to wave group,waveform,amplitude,frequency and phase characteristics.Here a full suite of QC methods is presented,which advances the precision of synthetic seismograms and meets the needs of horizon interpretation.