基于小波变换的功率谱方法及其在沉积单元界面定量划分中的应用  

A power spectrum method based on wavelet transformation and its application in quantitatively dividing interfaces of sedimentary unit

作　　者：闫建平[1] 蔡进功[1] 李尊芝[2] 

机构地区：[1]同济大学海洋地质国家重点实验室 [2]中国石油化工股份有限公司胜利油田分公司

出　　处：《中国海上油气》2008年第2期96-98,共3页China Offshore Oil and Gas

摘　　要：常用的依据多尺度小波变换系数二维平面图及三维立体时频色谱图不同周期的振荡性特征所反映出的小波尺度值来划分地层不同尺度的沉积旋回界面的方法,在读数提取时存在误差并且不够直观。提出了一种基于小波变换的功率谱来提取反映层序级别尺度的方法。应用结果显示,该方法能够有效地定量划分不同级别沉积单元的界面。Conventionally, the wavelet scale values, which are derived from different period oscillations in two and three dimension time-frequency diagrams of multi-scaled wavelet transformation coefficients, are used to divide different-scaled interfaces of sedimentary cycles. However, this method has errors in picking up readings and is not directly perceivable. Therefore, a new method is developed, which can obtain scales of sequence orders based on wavelet power spectrum. Its applications have indicated that this method is able to effectively divide interfaces of sedimentary units with different orders.

关 键 词：功率谱 小波变换 多尺度 沉积单元界面 定量划分 

分 类 号：O174.4[理学—数学] V221[理学—基础数学]