用VSP资料提取子波对地面地震记录作整形反褶积

Shape deconvolution of surface-seismic data using VSP wavelet,

选择与地面地震记录接近的 VSP 资料提取子波 b(t),经快速傅氏变换求得 B(f),将|B(f)|平滑滤波成|(f)|后作为滤波因子对 B(f)进行滤波,再经反傅氏变换,即可得到与地面地震记录子波最为接近的子波 d(t)。然后求取零相位整形因子,再对地震记录作整形反褶积及一些保持高信噪比的处理,便可输出高分辨率的零相位地震剖面。

The wavelet d(t) which is very similar to the wavelet of surface- seismic data can be obtained by①extracting wavelet b(t)from the VSP data that resemble the corresponding surface-seismic data; ②making fast Fourier transform of b(t)to get B(1);③smoothing |B(f)| into |B(f)|;④filtering B(f)using filtering operator |B(f)|;⑤perform- ing inverse Fourier transform of the filtering result. Then a high-resolution zero phase seismic section can be obtained by (1)acquiring zero-phase shaping operator,(2)doing shape decon- volution of surface-seismic data and (3)performing high S/N process- ing of the seismic data.