【摘要】 合成地震记录制作中的质量控制将最终决定地震地质层位标定的精度.为此,在分析合成地震记录原理基础上,从三个环节对合成地震记录制作进行质量控制:①通过测井数据精确计算反射系数;②提取与地震资料频谱一致、波形和相位稳定的地震子波;③在获得高精度速度场的基础上,从波组、波形、振幅、频率和相位特征等方面进行匹配调整等.通过对各个环节的研究分析,提出了一整套行之有效的质量控制方法,提高合成地震记录的精度,达到层位标定对合成地震记录精度的要求.更多还原

【Abstract】 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.更多还原