【摘要】 传统的地震解释主要是观测地震振幅及相位的变化,但是地震振幅也会掩盖地下介质中真实的地质情况.在许多情况下,重要的地质信息可能是通过与振幅特征无关的奇异性参数来传递的.本文提出奇异性指数,即Hlder指数α(又被称为Lipschitz指数),可以作为一种新的地震属性,它能够准确反映数据中的奇点的位置和奇异性强度.Hlder指数α是对某一点上或某一点周围很小的范围内的奇异性强度的度量,大的α值表示低的奇异性(或高的正则性).研究表明α可以作为一种自然的能够精确刻画地层边界的地震属性.本文根据这一思想,对合成和实测的地震数据进行了小波基础上的多尺度分析研究,结果表明由本文的算法得到的α提高了对地层边界划分的能力,而这些地层界面在传统的地震振幅显示则不明显.更多还原

【Abstract】 Seismic interpretation is traditionally based on reflection or amplitude. However, amplitude can also disguise the true nature of subsurface geology and blur stratigraphy boundaries. In many cases important information is carried by singularities that are not necessarily associated to a certain amplitude pattern. We present the Hlder exponent (α) as a new seismic attribute which captures locations and strengths of irregularities in data. The Hlder exponent (α) is a measure of singularity strength defined at or around a point. Higher α indicates a higher degree of regularity. We demonstrate that α is a natural attribute for delineating stratigraphy boundaries due to its excellent ability in detecting detailed geologic features from seismic data. We test our concept and wavelet-based multiscale analyzing algorithm on both synthetic and seismic data, and show that α improves our ability in the delineation of stratigraphy layers that would be otherwise vague in the original amplitude display. α has the potential to bring a major breakthrough in seismic data interpretation.更多还原