王永强^1,,
王华忠^1,,,
孙维蔷¹,
胡英²,
张才²
1. 同济大学海洋与地球科学学院波现象与智能反演成像研究组, 上海 200092
2. 中国石油勘探开发研究院, 北京 100083

基金项目: 国家重点研发计划变革性技术关键科学问题重点专项(2018YFA0702503)，国家重点研发计划深海关键技术与装备重点专项(2019YFC0312004)，国家自然科学基金(41774126)和国家科技重大专项(2016ZX05024-001，2016ZX05006-002)资助


详细信息

作者简介: 王永强, 男, 1989年生, 硕士, 同济大学海洋与地球科学学院, 研究方向为海上多次波压制与成像.E-mail: king573@foxmail.com

通讯作者: 王华忠, 男, 1964年生, 教授, 主要从事地震波传播、地震数据分析和地震波反演成像方面的研究工作.E-mail: herbhuak@vip.163.com

中图分类号: P631

收稿日期:2020-04-26
修回日期:2021-02-23
上线日期:2021-04-10

Ghost wave prediction and attenuation method using coding and decoding

WANG YongQiang^1,,
WANG HuaZhong^1,,,
SUN WeiQiang¹,
HU Ying²,
ZHANG Cai²
1. Wave Phenomena and Intelligent Inversion Imaging Group(WPI), School of Ocean and Earth Science, Tongji University, Shanghai 200092, China
2. Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China


More Information

Corresponding author: WANG HuaZhong,E-mail:herbhuak@vip.163.com

MSC: P631

--> Received Date: 26 April 2020
Revised Date: 23 February 2021
Available Online: 10 April 2021


摘要
摘要:高分辨率的宽带地震勘探技术是最近几年海上油气地震勘探的热点问题，鬼波压制是其中的核心议题.石油工业界，除了提出各种压制鬼波的采集方式外，资料处理过程中压制鬼波的方法也在不断地推陈出新.源、检鬼波的存在使得反射子波的有效频带变窄，成像分辨率降低，且干扰后续的自由表面多次波压制、FWI等.不同于常规的鬼波压制模型，本文基于编码与解码理论框架，用编码建立起鬼波预测模型，在Bayes反演框架下建立起解码估计一次波、从而压制鬼波的方法.基于此鬼波预测模型及相应反演理论的鬼波压制方法对鬼波的压制更为彻底.理论模型数据与实际资料测试结果验证了本文提出的理论框架和方法技术的有效性与优越性.
关键词: 宽带地震/
编码与解码/
鬼波预测模型/
鬼波影响因素/
贝叶斯反演/
鬼波压制

Abstract:Broadband seismic technology has been one of the hottopics recently in marine oil and gas seismic exploration, and the key is the ghost wave suppression. Apart from introducing new acquisition modes, the deghosting methods inthe data processing stage have been put forward. The existence of receiver/source ghosts, as coherent noises, fattens the wavelet, decreases the resolution of the image, and disturbs the subsequent multiple suppression and FWI.Different from the traditional ghost suppression model, in the paper, a new deghosting method which is based on coding and decoding theory is presented. A new ghost prediction model based on coding is built and then the Bayesian estimation theory is used to decode the ghost wave and the primaries using this model. Based on this model, the ghost wave will be attenuated thoroughly. Synthetic data and field data tests demonstrate its efficiency and advantages.
Key words:Broadband seismic exploration/
Coding and decoding/
Ghost prediction modeling/
Ghost influence factors/
Bayesian inversion/
Ghost attenuation



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