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单道地层剖面仪中采用回波迭加处理是提高地层穿透深度的一条新途径。由于回波迭加是在非共深度点条件下进行的,因此,回波迭加处理的信噪比提高因海底下地层倾斜而有一定的限制,本文导出了单道地层剖面仪回波速加处理的计算表达式。实时回波迭加处理机方案是,N个随机存取存贮器中的最老回波数据(与第1次声源发射相对应)被最新回波数据(与第N+1次声源发射相对应)所替换,由此可以得到相继N次发射的回波信号的输出,实时的回波速加处理机的输出传输给实时图象记录器。该迭加处理机成功地应用于我国第一台DDC-1深地层剖面仪,并获得了显著的效果。现场探测表明,8次回波迭加,可以使DDC1-1的地层穿透深度从600米增加到1000米。文中给出了对比探测(迭加和不迭加对比)地层剖面图。
The use of echo superposition in single-zone formation profiler is a new way to increase the depth of formation penetration. Because echo superposition is carried out under non-common-depth point conditions, the signal-to-noise ratio of echo superposition processing has some limitations due to sub-subterranean formation inclination. In this paper, Processing the calculation expression. The real-time echo superposition processor solution is that the oldest echo data (corresponding to the first sound source emission) among the N random access memories is replaced by the latest echo data (corresponding to the N + 1th sound source Emitting corresponding to the replacement), which can be N times the echo signal is transmitted, the output of the real-time echo speed processor added to the real-time image recorder. The superposition processor successfully applied to China’s first DDC-1 deep layer profiler, and achieved remarkable results. On-site surveys show that 8 times of echo overlap can increase the DDC1-1 formation penetration from 600 meters to 1000 meters. The paper gives the contrast exploration (superimposed and not superimposed contrast) stratigraphic profiles.