地球物理学进展 ›› 2018, Vol. 33 ›› Issue (4): 1721-1725.doi: 10.6038/pg2018AA0142

• 应用地球物理学Ⅱ(海洋、工程、环境、仪器等) • 上一篇    下一篇

部分共反射面元叠加技术在海上数据中的应用

王志亮1,孙小东2,*(),王旭谦3,李振春2,倪雪灿3,张敏2   

  1. 1. 中海石油(中国)有限公司天津分公司,天津 300452
    2. 中国石油大学(华东),山东青岛 266580
    3. 中海油田服务股份有限公司物探事业部,天津 300459;;
  • 收稿日期:2017-09-21 修回日期:2018-06-22 出版日期:2018-08-20 发布日期:2018-09-14
  • 通讯作者: 孙小东 E-mail:wanliliuyun@163.com
  • 作者简介:王志亮,1979年生,高级工程师,研究方向为地震资料采集处理.(E-mail: wangzhl5@cnooc.com.cn)
  • 基金资助:
    国家科技重大专项课题基金(2016ZX05024-003-011);国家自然科学基金(41574098,41504100);中央高校基本科研业务费专项资金(18CX02059A)

Pre-stack data enhancement by partial Common Reflection Surface (CRS) stack

WANG Zhi-liang1,SUN Xiao-dong2,*(),WANG Xu-qian3,LI Zhen-chun2,NI Xue-can3,ZHANG Min2   

  1. 1. CNOOC (Chinese) Company Limited,Tianjin Branch,Tianjin 300452, China
    2. School of Geosciences, China University of Petroleum,Shandong Qingdao 266580, China
    3. Geophysical Division of China Oilfield Services Limited, Tianjin 300459, China
  • Received:2017-09-21 Revised:2018-06-22 Online:2018-08-20 Published:2018-09-14
  • Contact: Xiao-dong SUN E-mail:wanliliuyun@163.com

摘要:

本文对共反射面元(CRS)叠加方法做改进,利用得到的波场参数来提高叠前地震资料的质量.利用CRS波场参数做部分CRS叠加,对菲涅尔带内的多个相邻CMP道集做倾角、曲率等校正后合并为一个道集即CRS超道集,可以补齐缺失地震道,实现叠前数据规则化,并提高信噪比.从而使得叠前道集中的同相轴尤其是来自深层的反射有更好的连续性,有利于识别和追踪.提高质量后的叠前道集可用于后续的速度分析、叠加、偏移等常规处理中,效果好于原始CMP道集.模型和实际数据的计算结果验证了该方法的正确性和有效性.该方法在低信噪比资料的处理中将会有广阔的应用前景.

关键词: 波场参数, CRS超道集, 数据规则化, 信噪比

Abstract:

In this paper, the technology of Common Reflection Surface (CRS) stack is modified so that a new pre-stack data enhancement method by kinematic wave-field parameters obtained from Common Reflection Surface (CRS) stack is introduced. Using CRS parameters from partial CRS stack (correct several CMP gathers in a CRS super-gather and output as one CMP gather) seismic trace supplement and pre-stack data regularization can be applied. Meanwhile, signal to noise ratio is also be improved. As a result reflection events especially from deep region in pre-stack gathers have better continuity and are more easier to be identified. Pre-stack gathers with improved quality can be applied in successive conventional processes such as velocity analysis, stack, migration and so on. Its result is much better than original CMP gather, which is verified by test on synthetic and real data. It is hopeful that this method has promising application in low S/N field data later on.

Key words: wave-field parameters, CRS super-gather, data regularization, signal to noise ratio

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