地震资料分辨率若干问题的探讨

地震资料分辨率的准确表征是提高分辨率研究的难点和关键之一。针对正演模拟资料、实际地震资料、井间地震资料,本文从客观量化角度对地震资料分辨率与频谱特征参数的关系进行了研究。结果表明:地震资料分辨率可由地震子波更准确表征;在有效频带范围内,主频和优势频带随着分辨率的提高逐渐向高频端移动,地震资料高频信息增多的同时,其低频特征参数表示的低频信息相应减少;地震资料分辨率的表征呈现复杂性、多样性和系统性。

Discussion of Some Questions on Resolution for Seismic Data

The accurate characterization of seismic data resolution is very difficult to achieve and its one of the keys to improve seismic data resolution.The relation between resolution and spectrum parameters is studied objectively and quantitatively for forward modeling seismic data,real seismic data,and crosswell seismic data.The resultsshow that the seismic wavelet can characterize resolution more accurately than itself for seismic data,with the increase of resolution,the dominant frequency and its bandwidth shift to the high frequency bandwidth within the effective bandwidth,and the characterization of resolution is complicated,diversified and systematic.