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南黄海以往一般采用单时窗合成地震记录,即对测井曲线求得反射系数与理论子波进行褶积,但由于地层浅部和深部的频率不同,导致合成地震记录和实际地震剖面吻合得不好。提出了对地震资料采用分时窗提取子波合成地震记录的方法,从井旁地震道提取地震子波进行频谱分析,地层浅部和深部地震子波的主频和波形不同,并考虑时延特性,采用分析结果的地震子波进行分时窗合成地震记录。与以往用单时窗合成地震记录相比,分时窗合成地震记录提高了合成地震记录与地震波组的吻合度和分辨率。
In the past, the single-time window synthetic seismogram was generally used in the southern Yellow Sea to convolve the reflection coefficient and the theoretical wavelet obtained from the well logging curve. However, due to the different frequencies in the shallow and deep strata, the synthetic seismogram coincides with the actual seismic section not good. This paper presents a method to extract seismograms from seismic data by using time-window method to extract seismograms. Spectrum analysis is made by extracting seismic wavelets from the seismogram beside the well. The dominant frequency and waveform of seismic wave in shallow and deep seams are different, Characteristics, time-windowed synthetic seismograms using seismic wavelet of analysis results. Compared with the previous synthetic seismic records using single-time windows, time-sharing window synthetic seismograms improve the coincidence and resolution of synthetic seismic records and seismic wave groups.