基于S变换谱分解技术地震勘探断层解释  

Seismic exploration fault interpretation based on S-transform spectral decomposition technique

作　　者：薛海军 李亮 汶小岗 吴大林 武浩 郭庆 XUE HaiJun;LI Liang;WEN Xiaogang;WU Dalin;WU Hao;GUO Qing(Shaanxi Coalfield Geophysical Surveying and Mapping Co.,Ltd.,Xi’an 710005,China)

机构地区：[1]陕西省煤田物探测绘有限公司,陕西西安710005 [2]自然资源部煤炭资源勘查与综合利用重点实验室,陕西西安710026

出　　处：《陕西煤炭》2024年第11期87-91,161,共6页Shaanxi Coal

摘　　要：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。Seismic exploration technology has been developed into a more mature geological exploration means and applied to geological exploration.In order to further improve the control accuracy of two-dimensional seismic data for the plane position and drop of large fault structures and three-dimensional seismic data for small faults,the basic principle of S-transform spectral decomposition technology is introduced.The structural geological models with different magnitude of fault drop are constructed to simulate the forward seismic data,and the S-transform spectral decomposition technique is used to process and analyze the forward seismic data.By comparing the geological model with the forward seismic time section and the spectral decomposition section after S-transform spectral decomposition,the analysis shows that the fault structure reflects more clearly in the frequency domain after spectral decomposition,and application of this technique to the actual two-and three-dimensional seismic data has obtained more reliable geological results.

关 键 词：地震勘探 断层构造 S变换 谱分解 

分 类 号：P631[天文地球—地质矿产勘探]