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浅地层地震剖面自动解译法比传统的人工目视解译法具有更大的优势,不仅可以快速地处理和解译地震剖面,且结果更为客观.本文从青藏高原黑海的原始剖面数据—SEG-Y数据文件出发,以优化的变长滑动时窗能量比法为基础,采用均值曲线法提取地层边界点,最后进行边界点的连续性检验,通过Matlab编程达到浅地层地震剖面的自动解译.变长滑动时窗的时窗取值范围、均值曲线法中峰值提取窗口大小是影响解译精度的关键参数.一系列的参数化方案实验与对比分析表明,当变长滑动时窗的取值范围在2~20之间,均值曲线峰值提取窗口大小取值在70~80之间时,黑海剖面自动解译得到的地层界线与人工解译得到的地层界线相似程度大于0.65,提取的边界点在界线附近的密集度大于0.8.利用这组参数在剖面解译时能够获得明显的地层界线,与通过钻孔和传统的人工目视解译法获得的地层界线基本吻合,相似度高,且连续性好,黑海其他两条剖面的解译效果也验证了这组参数的可靠与适用性.这组参数对其他地区的剖面数据的适用性还有待进一步研究,实验研究表明对剖面原始数据进行降噪等预处理后,这一自动解译方法可以拓展应用,同时能进一步提高解译的精度.
The method of automatic interpretation of shallow seismic profile has more advantages than traditional artificial visual interpretation, which can not only process and interpret the seismic profile quickly, but also get a more objective result.In this paper, we use the original profile data of the Black Sea in the Qinghai- SEG-Y data file, based on the optimized variable-length sliding window energy ratio method, the mean-curve method is used to extract the boundary points of the stratigraphy. Finally, the continuity of the boundary points is verified and the automatic solution of the shallow stratigraphic seismic profiles is achieved through Matlab programming The time window of variable length sliding window and the size of peak extraction window in mean curve method are the key parameters that affect the accuracy of interpretation.A series of experiments and comparative analysis of parametric schemes show that when the variable length sliding window When the value of the peak extraction window is between 70 and 80, the similarity between the stratigraphic boundaries automatically interpreted by the Black Sea section and the artificial interpretation boundaries is greater than 0.65, and the extracted The density of the boundary points near the boundary line is greater than 0.8. By using this set of parameters, obvious stratigraphic boundaries can be obtained when the profile is interpreted, as well as by drilling and traditional manual visual interpretation The stratigraphic boundaries are basically consistent, high similarity and good continuity, and the interpretations of the other two profiles of the Black Sea also verify the reliability and applicability of this set of parameters.The applicability of this set of parameters to profile data in other regions remains to be determined Further research and experimental studies have shown that this method of automatic interpretation can be extended and the accuracy of interpretation can be further improved after noise reduction and other preprocessing of the original profile data.