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讨论了地震剖面上常见的“层断波不断”现象。通过小波理论中的多尺度分析 ,对此现象进行了研究 ,恢复出了断点信息 ,拓宽了地震资料的应用范围。通过在MB地区的勘探实践 ,总结出从“层断波不断”的现象中判别断点位置的方法 :①在目的层上下方 ,检查地震波形在横向上有无能量的变化 ,如果有 ,则该处有断点可能性极大。在此基础上再查看这种现象在相邻测线上是否有连续性。②如果这种现象在空间具有连续性 ,但还不能清楚反映断点信息 ,则只能依据小波理论对资料进行叠后的进一步处理。建议在处理地震资料时 ,尽可能慎用依据信号的统计原则提高地震资料信噪比的模块 ;或在使用这些模块时 ,尽可能使用相对较少的地震道信息 ,以防止绕射波或其它有用信息遭到大的破坏。图 2参 3
This paper discusses the phenomenon of “constant layer fault” in the seismic section. Through the multi-scale analysis in wavelet theory, this phenomenon has been studied, the breakpoint information has been recovered, and the application range of seismic data has been widened. Based on the exploration practice in the area of MB, this paper summarizes the method of judging the position of the breakpoint from the phenomenon of “layer break-off”: (1) Check whether there is any change of energy in the horizontal direction in the upper and lower layers of the target layer; if so, There is a great possibility of a breakpoint. On this basis, check whether this phenomenon is continuous on the adjacent survey line. ② If the phenomenon of continuity in space, but can not clearly reflect the breakpoint information, you can only rely on the wavelet theory of post-stack further processing of the data. It is recommended to use as much caution as possible when dealing with seismic data to improve the signal-to-noise ratio of seismic data based on the statistical principles of the signal. Or, when using these modules, use relatively few trace information as much as possible to prevent diffraction or other Useful information has been greatly damaged. Figure 2 reference 3