浅层地震勘探方法在活动断层中的应用——以邯郸市活动断层探测为例

Application of Shallow Seismic Exploration of Active Faults——A Case Study of Handan Active Faults Exploration

摘要:

浅层地震勘探方法在城市活动断层探测中发挥着重要作用，实践表明，浅层地震反射波法可以获取深度十米至几十米的浅层地层反射信号，且大部分反射剖面均可较清楚地揭示出浅部断层位置和断层特征，地震数据处理是准确识别近地表活动断层的重要环节，也是提高资料分辨率和信噪比的有效途径。本文应用邯郸市活动断层浅层地震资料，运用多途径、分步骤的去噪技术和方法，压制干扰，极大地提高了资料的分辨率和信噪比，并对活动断层的典型剖面进行重点研究和验证。

Abstract:

The shallow seismic exploration plays an important role in the detection of active faults in cities. The previous practice shows that the shallow seismic reflection wave method can obtain the reflection signals of shallow strata from a depth of 10 meters to several tens meters. Moreover, most of the reflection profiles can clearly reveal the location and characteristics of shallow faults. On other hand, seismic data processing is also an important link for accurate identification of near-surface active faults, and it is an effective way to improve the data resolution and signal to noise ratio. In this paper, we used shallow seismic data of Handan active fault, with applying multi-path and step de-drying technique and method, by which the interference is suppressed and the signal-to-noise ratio and resolution of the data are greatly improved. Finally, in order to make more progress in data processing of super-layer seismic exploration on active faults, we studied and verified the typical sections of active faults, which can be used for reference in shallow seismic exploration on active faults.