宋建勇^1,,
王官超²,
王大兴³,
李劲松¹,
石玉梅¹,
叶月明⁴
1. 中国石油勘探开发研究院, 北京 100083
2. 中国石油大学(北京), 北京
3. 中国石油长庆油田分公司勘探开发研究院, 西安 710021
4. 中国石油杭州地质研究院, 杭州 310023

基金项目: 中国石油天然气集团有限公司"十三五"基础研究项目（2018A-3306），长庆油田5000万吨持续高效稳产关键技术研究与应用（2016E-503），国家自然科学基金项目（41504110，41504105），中国石油集团公司直属院所基础研究及战略储备技术研究基金（2018D-500816）资助


详细信息

作者简介: 宋建勇, 男, 1982年生, 高级工程师, 目前从事地震波正演、偏移及反演方面研究.E-mail:songjy82@petrochina.com.cn

中图分类号: P631

收稿日期:2018-01-23
修回日期:2019-06-26
上线日期:2019-08-05

Inversion of elastic reflection traveltime based on the decoupled wave-equations

SONG JianYong^1,,
WANG GuanChao²,
WANG DaXing³,
LI JinSong¹,
SHI YuMei¹,
YE YueMing⁴
1. Research Institute of Petroleum Exploration & Development, CNPC, Beijing 100083, China
2. China University of Petroleum(Beijing), Beijing 102249, China
3. Research Institute of Petroleum Exploration & Development, PCOC, Xi'an 710021, China
4. PetroChina Hangzhou Research Institute of geology, Hangzhou 310023, China


MSC: P631

--> Received Date: 23 January 2018
Revised Date: 26 June 2019
Available Online: 05 August 2019


摘要
摘要:基于常规弹性波动方程的反射波走时反演结合走时和反射波信息可以有效的摄取模型参数中的低波数成分，然而纵横波之间的耦合效应以及纵横波速度对波场的敏感性差异，导致反演的非线性问题增强.为此本文研究了基于解耦波动方程的反射波走时反演，并提出改进的时移互相关目标函数，分别隐式计入射波场快照与反传波场快照的时移量，很大程度的降低了纵波、横波之间的耦合关系，并提高纵横波速度低波数信息的反演质量.最后模型测试证明了本文方法的正确性.
关键词: 纵横波解耦/
反射波走时反演/
全波形反演/
时移互相关

Abstract:In this paper, the inversion method of elastic reflection wave travel time is studied. In this method, the low wavenumber components in the model parameters can be effectively obtained by combining the travel time and reflected wave information. Considering the coupling effect between P-S waves and the sensitivity of P-S wave velocities on the wave field in elastic wave inversion, we further develop an inversion method of reflection wave travel time inversion based on decoupled wave equations. Combining with time-shift cross-correlation misfit function, this method implicitly calculate the compressional and shear wave travel time, respectively. The coupling relationship between P-and S-waves is reduced to a great extent and the inversion quality of the velocity of P-S waves is improved. Finally, model tests prove the correctness of this method.
Key words:Decoupling of compressional and shear waves/
Reflection travel-time inversion/
Full waveform inversion/
Time shift correlation



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