有限熵反褶积

Limited entropy deconvolution

本文从传统的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,指出了现行的最小 熵反褶积方法存在的一些问题。针对规范方差模压制弱反射的不足,提出了利用对数变换熵模替代规范方差模 的方法,并将最小熵改为有限熵,使地震记录的熵模向给定的熵模靠近,而不是一味减小熵。此法可有效地减小 对弱反射的压制。实际资料的处理结果证明了该方法的正确性,在减小压制弱反射的前提下,能有效地提高地 震资料的分辨率,较好地保持地震资料的整体能量平衡。此法是经典的最小熵反褶积方法的进一步发展。

Starting from traditional minimum entropy de-convolution, the paper studied the conception of entropy and its concrete meaning in seismic exploration and pointed out some problems existed in current-used minimum entropy deconvolution method. Faced with the disability that the normalized variance norm would suppress the weak reflections , the paper presented the method using the logarithm transform entropy norm to replace the normalized variation norm and changed the minimum entropy to limited entropy, which made entropy norm of seismic records close to given en- tropy norm but did not constantly reduce entropy. The method can effectively reduce suppression of weak reflections. The processed results of real data showed the correctness of the method, which can effectively improve the resolution of seismic data in a precondition of reducing suppression of weak reflections that better keeps the balance of total energy in seismic data. The method is further development of classic minimum entropy deconvolution.