Shaanxi Coalfield Geophysical Surveying and Mapping Co., Ltd.
Key Laboratory of Coal Exploration and Comprehensive Utilization, Ministry of Land and Resources

地震勘探技术已经发展成为一种较为成熟的地质勘探手段并应用于地质勘探,为了进一步提高二维地震勘探资料对较大断层构造平面位置和落差的控制精度以及三维地震资料对小断层的控制精度,介绍了S变换谱分解技术的基本原理,构建断层落差不同大小的构造地质模型进行地震正演模拟,采用S变换谱分解技术对正演的地震资料进行处理分析。通过对比地质模型及正演地震时间剖面和S变换谱分解后的谱分解地震剖面,分析认为断层构造在谱分解后的频率域反映更清晰,并将该技术应用到实际二、三维地震资料中,取得了较可靠的地质成果。

geological exploration. In order to further improve the control accuracy of two-dimensional seismic data for the plane positionand drop of large fault structures and three-dimensional seismic data for small faults, the basic principle of S-transform spec-tral decomposition technology is introduced. The structural geological models with different magnitude of fault drop are con-structed to simulate the forward seismic data, and the S-transform spectral decomposition technique is used to process andanalyze the forward seismic data. By comparing the geological model with the forward seismic time section and the spectraldecomposition section after S-transform spectral decomposition, the analysis shows that the fault structure reflects more clear-ly in the frequency domain after spectral decomposition, and application of this technique to the actual two - and three-di-mensional seismic data has obtained more reliable geological results.