| 摘要: |
| 本文介绍了小波变换的基本原理和步骤,探讨了测井信号小波变换在层序地层划分中的方法和地质意义。对南海北部莺歌海盆地D14井黄流组自然伽马(GR)测井信号利用Daubechies小波系db5小波进行了一维连续小波变换和一维离散小波变换。根据其时频色谱图特征和高频离散系数曲线特征,将黄流组一段划分出1个长期旋回、3个中期旋回和9个短期旋回。显示出小波变换在测井层序地层划分中较高的分辨率、在识别地质作用中的隐蔽旋回特征的优势。实践证明,将一维连续小波变换和一维离散小波变换进行综合分析,更有利于不同级次的层序旋回识别。 |
| 关键词: 小波变换 层序地层 测井信号 莺歌海盆地 |
| DOI： |
| 附件 |
| 投稿时间：2011-02-18修订日期：2011-03-23 |
| 基金项目: |
|
| An application of the wavelet transformation to sequence stratigraphy: A case study of the Huangliu Formation in the Yinggehai Basin, northern South China Sea |
| WANG Ya-hui, ZHAO Peng-xiao, ZUO Qian-mei, ZHONG Ze-hong, LI Jun-liang |
(1. Zhanjiang Branch, CNOOC, Zhanjiang 524057, Guangdong, China;
2. Zhanjiang Laboratory Center, CNOOC, Zhanjiang 524057, Guangdong, China) |
| Abstract: |
| The present paper gives an introduction of the terminology, principle, method and significance of the wavelet transformation in sequence stratigraphic division. The gamma-ray logging data for the D14 well in the Yinggehai Basin are explored with the aid of db5 wavelet in one-dimensional continuous wavelet transformation and one-dimensional discrete wavelet transformation, respectively. One long-term cycle, three medium-term cycles and nine short-term cycles are discriminated for the first member of the Huangliu Formation according to the time-frequency chromatogram and high-frequency discrete coefficient curves. The results of the study show that the wavelet transformation may provide a tool for the division of high-resolution logging sequence stratigraphy and recognition of subtle sequence cycles. The integration of one-dimensional continuous wavelet transformation and one-dimensional discrete wavelet transformation will be more favourable for the recognition of sequence cycles of varying orders. |
| Key words: wavelet transformation sequence stratigraphy logging signal Yinggehai Basin |
