论文部分内容阅读
在酒西盆地山地勘探中,其地震地质条件极为复杂,主要表现为地表变化剧烈和地下为大倾角逆掩推覆构造,由此导致地震记录信噪比低、各种干扰波发育和近地表静校正问题严重。由于有效波较弱或完全被噪音所覆盖,加上宽线采集施工,给地震资料处理带来了很大的难度。这里从分析原始资料入手,提出了针对静校正问题和低信噪比问题的处理对策和关键技术。在此基础上,试验了多种宽线叠加方法,经对比最终选定了横向三维大面元叠加方式。通过应用效果进行分析,总结出一套山地宽线地震资料处理的实用方法。
In the mountainous exploration of Jiuxi basin, the seismic geological conditions are extremely complicated, mainly due to the violent change of surface and the overturning of the deep concealed thrust nappe structures, resulting in low signal-to-noise ratio of seismic records, development of various interference waves and near-surface Static correction is a serious problem. As the effective wave is weak or completely covered by noise, combined with wide line acquisition and construction, the seismic data processing has brought great difficulty. Here we start with the analysis of the original data and put forward the countermeasures and key technologies for the problem of static correction and low signal-to-noise ratio. On this basis, a variety of wide-line superposition methods were tested, and finally the transverse three-dimensional large-area superposition method was selected. Through the analysis of application effects, a set of practical methods for processing broadband seismic data in mountainous areas is summarized.