地震资料的有限熵反褶积方法

The limited entropy deconvolution of seismic data

从传统最小熵反褶积方法入手,探讨了熵的概念及其在地震勘探中的具体涵义,指出现行的最小熵反褶积方法存在的一些问题。针对常用"规范方差模"压制弱小反射的不足,提出了利用对数变换熵模来替代的做法。在此基础上提出改以往的"最小熵"为"有限熵"。有限熵方法能有效地提高地震资料的分辨率且不压制弱小反射,可较好地保持地震资料的整体能量平衡,是经典最小熵反褶积方法的进一步发展。

Starting with the traditional minimum entropy deconvolution, the conception of entropy and its specific meanings in seismic prospecting are discussed. Shortcomings of the current minimum entropy deconvolution are pointed out. For the suppression of 'normalized variance norm' to weak reflections, an alternation of 'logarithm transform norm' is proposed. On the basis of that 'minimum entropy' changed to 'limited entropy' is developed. Limited entropy can prevent weak reflections from suppression, improve the resolution, and keep energy balanced to the whole profile. It is a update to the classical minimum entropy deconvolution.