应用Hilbert Huang变换方法研究等时小层划分及对比

 小层对比是油田开发过程中的基础性工作,其对比精度和准确性关系到是否能发现以前漏掉的一些储集层。为了提高小层对比精度，文中提出了应用Hilbert Huang变换方法提取等时小层的“三瞬”参数响应特征进行等时小层划分及对比的方法:首先用经验模态分解（EMD）方法对测井资料进行处理，得出不同尺度的固有模态函数(IMF)；然后根据区域等时小层边界标定的要求，对不同尺度大小的固有模态函数进行Hilbert变换，提取出反映等时小层边界特征的瞬时频率、瞬时振幅、瞬时相位等（三瞬）参数；最后利用高分辨率剖面重建技术对瞬时频率进行重构，得到Hilbert谱。利用“三瞬”参数的周期旋回变化及Hilbert谱特征可标定小层的界面并在旋回的控制下进行等时小层对比。此法已在长庆油区应用，表明该方法是有效的。

Application of Hilbert-Huang transform to study classification and correlation of isochrone substratum

Substratum correlation is basic work in oil-field development,its precision and accuracy determines if the missed reservoirs can be found or not.For raising the precision of substratum correlation,application of Hilbert-Huang transform in extraction of three instantaneous parameters to conduct isochrone substratum classification as well as the correlation methods were introduced in this paper as below:at first using empirical mode decomposition method to process well logging data and obtaining intrinsic mod...