【摘要】 烃渗漏蚀变带"磁亮点"是近年来发展起来的一种直接找油的新技术,随之出现了不少用于提取"磁亮点"的方法,本文主要探讨了提取"磁亮点"的高阶统计量方法。文中主要对高阶统计量的有关性质进行了研究,并且从理论上证明了高阶统计量不仅可以完全抑制信号中的高斯有色噪声影响,而且还能提供功率谱所没有的相位信息,表明高阶统计量比功率谱方法更具优越性。文中还分析了由烃渗漏蚀变带产生的"磁亮点"的统计特征,表明了高阶统计量用于提取"磁亮点"的可行性。最后,将此法用于巴彦浩特盆地航磁资料提取"磁亮点"。结果表明,高阶统计量方法与宽度幅值特征滤波方法相似,而且效果更好,高阶统计量方法在地球物理信号分析中一定会得到更加广泛的应用。更多还原

【Abstract】 The"magnetic bright spot" appeared in hydrocarbon-penetrated alteration zone is a new developed direct hydrocarbon detector technology in recent years and along with this many new methods used for detection of "magnetic bright spot" appeared. The paper mainly discussed the method of high-order statistics aimed at picking up "magnetic bright spot". The paper mainly studied the highorder-statistics-related natures and proved theoretically that high-order statistics not only totally suppressed the impact of Gauss color noises in signal, but also provided phase information the power spectrum haven’t, which showed that the high-order statistics is more superior to power spectrum method. The paper also analyzed the statistic characters of "magnetic bright spot" produced by hydrocarbon-penetrated alteration zone and showed the feasibility using high-order statistics for detection of "magnetic bright spot". Finally,the method is used to pick up "magnetic bright spot" from aeromagnetic data in Bayanhaot basin. The results showed the high-order statistics method is similar to width amplitude character filtering method but has better results. The high-order statistics method can find wide application in geophysical signal analysis.更多还原