吉林大学学报(地球科学版) ›› 2021, Vol. 51 ›› Issue (2): 597-606.doi: 10.13278/j.cnki.jjuese.20200111

• 地球探测与信息技术 • 上一篇    

基于f-x EMD波场分离的绕射多次波压制方法

王睿1, 王德利1, 胡斌1, 王铁兴1, 王通2, 崔亚龙3   

  1. 1. 吉林大学地球探测科学与技术学院, 长春 130026;
    2. 中国地质科学院地球物理地球化学勘查研究所, 河北 廊坊 065000;
    3. 吉林省中地岩土工程有限公司, 长春 130000
  • 收稿日期:2020-05-04 发布日期:2021-04-06
  • 作者简介:王睿(1991-),男,博士研究生,主要从事多次波压制方法研究,E-mail:752201089@qq.com
  • 基金资助:
    国家科技重大专项项目（2016ZX05026-002-003）；国家自然科学基金项目（41374108）

Diffracted Multiple Elimination Based on f-x EMD Wavefield Separation

Wang Rui1, Wang Deli1, Hu Bin1, Wang Tiexing1, Wang Tong2, Cui Yalong3   

  1. 1. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China;
    2. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, Hebei, China;
    3. Jilin Zhongdi Geotechnical Engineering Co. LTD, Changchun 130000, China
  • Received:2020-05-04 Published:2021-04-06
  • Supported by:
    Supported by the National Nature Science Foundation of China(2016ZX05026-002-003) and the National Natural Science Foundation of China(41374108)

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摘要： 自由表面多次波压制（SRME）方法是海洋地震数据处理中的关键步骤。当存在崎岖海底条件时，绕射波十分发育，常规SRME算法很难将复杂绕射多次波有效消除。对压制效果较差的多次波进行成因分析，首先基于f-x EMD波场分离算法，将全数据分解为反射部分和绕射部分，再对其进行多次波预测，获得绕射预测多次波子集：反射-绕射预测多次波、绕射-反射预测多次波和绕射-绕射预测多次波。然后，改进常规SRME算法的迭代过程，在SRME的迭代过程中使用与原数据中多次波更加匹配的绕射多次波子集进行多次波压制。与常规SRME算法的对比结果表明，改进的SRME算法在理论数据和实际数据处理中对多次波的压制都取得更好的效果。

关键词: 自由表面多次波压制, f-x EMD波场分离, 反射-绕射预测多次波, 绕射-反射预测多次波, 绕射-绕射预测多次波

Abstract: Surface-related multiple elimination (SRME) is a key step in marine seismic data processing. However, under rough seabed conditions, diffractions are well developed,and the conventional SRME can hardly eliminate complex diffracted multiples. To analyze the causes of multiples with poor suppression effect, firstly we proposed wavefield separation based on f-x EMD to separate the whole data into a reflection part and a diffraction part, so that the multiple prediction can be carried out with these different subsets of the input data, and then the new subsets of predicted multiples can be obtained as reflected-diffracted predicted multiples, diffracted-reflected predicted multiples, and diffracted-diffracted predicted multiples. Further, we modified the interactive process of the conventional SRME by using the better matched diffracted multiple subsets to eliminate multiples. Compared with the conventional SRME, our improved SRME achieved better multiple attenuation results in both synthetic data and field data.

Key words: surface-related multiple elimination, f-x EMD wavefield separation, reflected-diffracted predicted multiples, diffracted-reflected predicted multiples, diffracted-diffracted predicted multiples

中图分类号: 

  • P631.4
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