基于测井数据小波变换和Hilbert-Huang变换的地层层序划分与对比

Stratigraphic Sequence Division and Correlation of Wavelet and Hilbert-Huang Transform Based on Well-logging Data

测井资料应用于地层层序研究的实例很多,一般选取能够敏感反映沉积堆积过程的GR或AC曲线作为研究基础,多注重测井曲线形态及幅值特征的应用。在前人所做工作的基础上,本文首先利用数学方法构建了测井仿真分段信号,然后利用一维连续小波变换和Hilbert-Huang变换对仿真信号进行了分析,验证了这两种方法的有效性及提出了两种分析方法的异同点。在此基础上,利用两种方法的结合对济阳坳陷惠民凹陷中钱斜14井沙河街组段的GR曲线进行了分析与层序划分,将其划分为三个三级层序。

There are many examples to apply well-logging data to stratigraphic sequence. Generally GR or AC curve which can sensitively reflect the accumulation of deposition process is selected for a basic research and it is emphasized on the application of well-logging curve shape and amplitude characteristics. This paper first constructed the well-logging simulated segment signal using mathematical methods based on the previous works and then analyzed on the simulated signal with one-dimensional continuous wavelet and Hilbert-Huang transform to verify the effectiveness of the two methods and present the similarities and differences between them. On this basis, a combination of two methods was applied in 14 wells of the Shahe street segment of Huimin and Jiyang Qianxie to analyze GR curve and stratigraphic sequence to be divided into three sequences.