【摘要】 三江盆地多次波形成的主要因素是区内存在一套反射很强的平行不整合地层(穆棱组),并且还发育大量高速煤层。本文从时空域、拉冬域、频率域及自相关等多个方面对多次波的地球物理特征进行了较详细的分析,发现了多次波在本区存在的规律性,并应用拉冬域、频率域正、反变换及自适应多次波切除等方法对多次波进行了分离和研究。表明拉冬域分离效果最好。在此工作的基础上,开发了一套多次波去除技术,由于该技术是在频率域应用拉冬正变换技术,提高了多次波的聚焦性能,并将滤波函数与相干技术相结合,从而实现自适应去除多次波的目的,而且稳定性很好。更多还原

【Abstract】 The main reason forming multiple in Sanjiang basin is existence of a set of parallel inconformity layers (Muleng Formation) with strong reflectivity.Meanwhile, a great deal of high-velocity coal seam is developed. From many aspects such as time-space domain, Radon domain, frequency domain and autocorrelation, the paper analyzed in detail the geophysical feature of multiple, discovered regularity the multiple existed in the region and used forward and inverse transform in Radon and frequency domains as well as adaptive multiple muting for separation and study. It is shown that the effects of separation in Radon domain are better. On that basis, we developed a set of multiple-eliminated technique. Because the technique is Radon transform technique applied in frequency domain, which improves the focus property of multiple; combining filtering function with coherent technique, the aim of adaptive multiple-elimination is fulfilled, which has good stability.更多还原