基于复数道地震记录的匹配追踪算法及其在储层预测中的应用

摘要

匹配追踪算法是一种高精度的非线性的时频分析方法.该方法自从提出以来在地球物理学领域得到了广泛的应用.在以前的应用中,作者们都是在实信号的基础上对算法原理作了适当的简化.本文在复数地震道的基础上,基于复Morlet子波,阐述了匹配追踪算法的原理及其算法实现过程,并给出了具体的算法流程图.通过与传统的时频分析的比较,验证了该算法具有较高的时频分析精度.对于实际资料的应用表明,该算法能够很好的显示储层的位置与边界.%Matching pursuit is a nonlinear high-precision time-frequency analgsis method. It has made a wide range of applications in the field of geophysics since its proposition. All the previous implementations are based on real wavelets and real seismic traces. This paper describes the principle of matching pursuit based on complex Morlet wavelet and complex seismic traces. Furthermore, the flow chart of this algorithm is given. Comparisons with traditional time frequency methods show that the proposed matching pursuit method has higher accuracy. The real data applications show that the proposed method can better display the locations and boundaries of reservoirs.