基于连续小波变换Teager-Kaiser能量在储层预测中的应用

Continuous wavelet transform Teager-Kaiser energy application in reservoir prediction

Teager-Kaiser能量算子是一种用来分析单频信号局部离散性非线性能量密度比较有效的方法.不同类型地质体以及含油气储层将引起地震信号的能量密度产生异常,基于连续小波变换Teager-Kaiser能量就是利用这个特征进行储层预测.本文采用连续小波变换(CWT)的多尺度分辨属性和Teager-Kaiser能量算子相结合的办法进行储层预测,该方法得到的结果和20多口井的实钻资料非常吻合,能有效地刻画砂体的边界特征,平面展布和横向上的非均匀性,同时还得到一定的沉积相特征.通过理论以及实际资料分析表明基于连续小波变换Teager-Kaiser(WAVETK)能量可以作为一种有效的方法进行储层预测.

Wavelets transform Teager-Kaiser energy is a much more local nonlinear energy estimate valid for monofrequency signals.Various types of geological body and reservoir will lead the abnormal of energy from seismic original which Wavelet transform Teager-Kaiser energy used to detect reservoir.This article jointed multiresolution of Wavelet transform and TeagerKaiser energy to detect geological features,the result obtained by the method mentioned above is very coincide to data of more than twenty wells.The boundary,distributed shape and Lateral heterogeneity of geological body in research region can be depicted very well, meanwhile,the characteristics of sedimentary facies from the result can also be depicted.Therefore,it shows that Wavelets transform Teager-Kaiser energy can be used as a valid method to depict geological features by the theoretical and practical data analysis.