基于Hilbert-Huang变换的测井曲线自动分层方法  

Automatic Stratification of Well Logging Curves with Hilbert-Huang Transform

作　　者：覃瑞东 潘和平[1] 郭博[1] 刘宇涛[1] 杨怀杰[1] 

机构地区：[1]中国地质大学(武汉)地球物理与空间信息学院,武汉430074

出　　处：《地质科技情报》2017年第2期258-264,共7页Geological Science and Technology Information

基　　金：国家高技术研究发展计划("863"计划)项目(2014AA06A608)

摘　　要：利用Hilbert-Huang变换方法得到测井曲线各个固有模态函数的瞬时频率,将测井曲线的瞬时频率变化剧烈的点作为层界面位置,从而实现测井曲线自动分层。首先构建并分析了一个理想信号,证实了Hilbert-Huang变换作为分层方法的有效性和优越性,然后将这种方法应用到实际的测井资料中进行自动分层,并给出了根据Hilbert-Huang变换进行测井曲线自动分层的具体步骤,对比了不同参数和方法下的分层结果。分层结果显示,一般前三个分量的分层结果与实际结果符合较好。将HilbertHuang变换的分层结果与其他方法分层结果相比较发现,该方法不需设定过多的分层参数就可以准确地识别层界面,分层点具有明确的物理意义,而且得到的是不同尺度的分层结果,相比于传统分层方法更加准确和高效。The object of this study is to stratify the well logging curves automatically by utilizing the Hil- bert-Huang transform to obtain the instantaneous frequencies of every single IMF. The basis of Hilbert- Huang transform is to find the location where instantaneous frequencies vary tremendously. Firstly, an ide- al signal is generated and analyzed to investigate the validity and superiority of this stratification proce- dure. Then this process is applied into the automatical stratification of field logging data to identify the stratigraphic formation interfaces. The concrete stratification steps are proposed in this paper before com- paring the results of different stratification parameters and methods. The consequences show that Hilbert- Huang transform can recognize the interface more accurately and efficiently, and results acquired from the first three components are in good agreement with actual situation. Furthermore, the result of Hilbert- Huang transform is of different scales and has a specific physical meaning at the same time, which makes it of great advantages compared with other traditional stratification methods.

关 键 词：自动分层 HHT 瞬时频率 测井曲线 层界面 

分 类 号：P631[天文地球—地质矿产勘探]