应用Hilbert-Huang变换方法研究等时小层划分及对比  

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

作　　者：徐敬领[1] 王贵文[1] 刘洛夫[1] 张春花[1] 薛宗安[1] 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京100029

出　　处：《石油地球物理勘探》2010年第3期423-430,共8页Oil Geophysical Prospecting

基　　金：中石油国家科技重大专项(2008ZX05020)"复杂油气藏测井综合评价技术;配套装备与处理解释软件"资助

摘　　要：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。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 mode function with different scales,then according to the requirement for regional isochrone substratum boundary calibration,conducting Hilbert transform to intrinsic mode function with different scales and extracting 'three instantaneous' parameters (instantaneous frequency,instantaneous amplitude and instantaneous phase) which reflect the characteristics of isochrone substratum boundary,at last applying high resolution section reconstruction technique in reconstructing instantaneous frequency and obtaining Hilbert spectrum.The cyclic changes for 'three instantaneous' parameters and the Hilbert spectrum characteristics can be used to conduct calibration of substratum boundary and correlation of isochrone substratum under the control of the cycle.The method has being utilized in Changqing oil-field,it is proved that the method is effective.

关 键 词：测井资料 HILBERT-HUANG变换 等时小层划分及对比 “三瞬”参数 经验模态分解 固有模态函数 

分 类 号：TE122.2[石油与天然气工程—油气勘探]