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南海北部洋陆过渡带水深变化剧烈,海底地形崎岖,构造复杂多变,地震勘探中多次波十分发育,常规处理难以取得很好的成像效果.由于方法的局限性,任何一种多次波压制方法都很难彻底地压制全部多次波.本文通过对国家基金委共享航次在南海北部陆缘采集的二维反射地震资料的分析,总结了不同多次波压制技术的优缺点和适用范围,结合滤波类方法和波动理论类方法,综合应用了表面相关多次波衰减法(SRME,Surface Related Multiple Elimination)、τ-p域预测反褶积、高分辨率抛物线Radon变换以及叠后压制残余多次波等方法去除多次波,有效突出了一次反射波,证明了方法的有效性和实用性,同时也形成了针对南海深水资料多次波压制的一种有效的处理流程和方法组合.
Due to the drastic changes of water depth in the transitional zone of the North China Sea in the northern part of the South China Sea, the terrain of the seafloor is rugged and the structure is complex and changeable. The multiple waves in the seismic exploration are well developed and it is difficult to obtain good imaging results by conventional treatment. Due to the limitation of the method, It is difficult to suppress all multiples completely.According to the analysis of two-dimensional reflection seismic data acquired by National Commission for shared voyage on the continental margin in the northern South China Sea, the advantages and disadvantages of different multiples suppression technology and its application range , Combined with the methods of filtering class and wave theory class, the surface-correlated multiple attenuation (SRME), the prediction of τ-p domain deconvolution, the high-resolution parabola Radon transform and the post-stack suppression Multiple waves and other methods to remove multiple waves effectively highlight a reflected wave, which proves the effectiveness and practicability of the method. At the same time, it also forms an effective processing flow and combination of methods for multi-wave suppression of deepwater data in the South China Sea.