多分量地震资料层位对比

CONSISTENT MATCHING BY THE MULTICOMPONENT SEISMIC METHOD

随着勘探技术的发展和勘探目标要求的提高,多分量地震勘探方法越来越被人们所重视。转换波的层位对比一直是多分量地震勘探的难点之一,尤其是在缺乏横波测井资料的情况下,对比就更加困难。通过转换波正演模拟,识别出转换波的波形特征,这为层位对比奠定理论基础。在正演模拟理论和试验基础的指导下,通过由粗到细、由已知到未知的方法,结合层位对比的五项原则和正演模拟验证,完成G区二维三分量地震资料的层位对比,取得了良好的效果,为后续进一步的解释打下了坚实的基础。

The multicomponent seismic method becomes more and more attractive with the development of seismic exploration techniques and the increase of target complexity.In this paper,according to the forward modeling of converted wave,waveform attributes of converted wave and P-wave are identified,which can be referenced when the converted wave and P-wave seismic profiles are to be matched.Seismic profiles' matching is one of the most difficult points of multicomponent seismic exploration,especially when lacking of S-wave well-logging data.Combined with the Five Matching Rules,C-wave and P-wave seismic profiles were matched effectively in this paper by means of matching from roughness to detail,from known to unknown.With this method,a satisfied PP and PS wave consistent matching result was achieved in the block G,which lays substantial foundation for the later interpretation.