利用VSP提高地震资料处理质量的新途径

New Way to Improve Seismic Data Processing with VSP

为了改善地面地震资料反褶积处理质量,针对地震资料因地面接收干扰严重,衰减和吸收作用较大,难以真正反映地震波在地下各个深度地层传播的地震子波,不能得到精确的反褶积算子的问题,通过利用VSP测井在潜水面以下激发、井下不同深度地层接收的特征,从VSP资料中提取该反褶积算子,并用于叠后地面地震资料反褶积处理中。结果表明,此方法可明显提高叠后处理剖面的分辨率,改善同相轴的连续性,加强波阻特征,并最终使叠后处理剖面质量得到较大的改进。

In view of the fact that seismic data are hard to exactly reflect seismic wavelet traveled from strata of various depths and to get precise deconvolution operator due to serious disturbance in surface receiver and greater decay and absorption, VSP logging is adopted, picking-up the operator from it, and applied the deconvolution processing of post-stack seismic data. Results show that this technique can be used to remarkably improve the resolution of post-stacked profile, continuity of event and intensify wave impedance in order to finally improve the quality of post-stack processed profile.