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物探与化探  2021, Vol. 45 Issue (1): 140-148    DOI: 10.11720/wtyht.2021.2470
  方法研究·信息处理·仪器研制 本期目录 | 过刊浏览 | 高级检索 |
粘弹介质叠前四参数同步反演及应用
刘浩杰1, 陈雨茂1, 王延光1, 宗兆云2, 吴国忱2, 侯庆杰1,3
1.中国石油化工股份有限公司胜利油田分公司 物探研究院,山东 东营 257022
2.中国石油大学(华东) 地球科学与技术学院,山东 青岛 266580
3.胜利石油管理局 博士后科研工作站,山东 东营 257000
Prestack four-parameter synchronous inversion method based on viscoelastic medium theory and its applications
LIU Hao-Jie1, CHEN Yu-Mao1, WANG Yan-Guang1, ZONG Zhao-Yun2, WU Guo-Chen2, HOU Qing-Jie1,3
1. Geophysical Research Institute,Sinopec Shengli Oilfield Company,Dongying 257022,China
2. School of Geosciences,China University of Petroleum,Qingdao 266580,China
3. Working Station for Postdoctoral Scientific Research,Shengli Oilfield,Dongying 257000,China
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摘要 

叠前地震资料中包含纵波速度、横波速度、密度和吸收衰减系数等弹性及粘弹性信息,其中吸收衰减属性对储层物性及流体性质尤为敏感。本文从粘弹介质精确Zoeppritz方程出发,基于介质分解理论通过公式推导及近似,建立了包含纵波速度、横波速度、密度和吸收衰减系数的纵波反射系数特征方程,利用贝叶斯反演框架,实现了叠前纵波速度、横波速度、密度、衰减四参数同步反演。模型与实际资料反演效果均表明了该方法的可靠性。该方法较好应用于胜利油田东部海上探区的油气识别,相比于常规弹性介质流体因子,四参数同步反演方法得到的吸收衰减系数能更准确地表征油气的分布。

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刘浩杰
陈雨茂
王延光
宗兆云
吴国忱
侯庆杰
关键词 叠前反演粘弹性介质四参数同步反演流体识别储层预测    
Abstract

Prestack seismic data contain elastic and viscoelastic information such as P-wave velocity,S-wave velocity,density and absorption attenuation parameters,among which absorption attenuation property is particularly sensitive to reservoir physical properties and fluid properties.Based on the accurate Zoeppritz equation of viscoelastic medium and the theory of medium decomposition,the authors established the characteristic equation of P-wave reflection coefficient including P-wave velocity,S-wave velocity,density and absorption attenuation parameters.Furthermore,under the constraint of Bayesian inversion framework,the simultaneous inversion of prestack four parameters was realized.The reliability of the method was verified by the trial of forward model.Finally,the method was applied to oil and gas identification in the eastern offshore exploration area of the Shengli Oilfield.Compared with things of the fluid factor based on elastic medium,the absorption and attenuation parameters obtained by the four-parameter simultaneous inversion method can more accurately characterize the distribution of oil and gas.

Key wordsprestack inversion    viscoelastic medium    four-parameter simultaneous inversion    fluid identification    reservoir prediction
收稿日期: 2019-10-09      修回日期: 2020-09-10      出版日期: 2021-02-20
ZTFLH:  P631.4  
基金资助:胜利油田科研攻关项目“非均质储层频变地震预测技术研究”(YKW1905);中石化股份公司科研攻关项目“致密油藏甜点地震精细描述及物性参数预测”(PE19008-6);胜利石油管理局博士后科研课题“致密油藏物性参数定量表征及有利储层预测”(YKB1907)
作者简介: 刘浩杰(1976-),男,研究员,长期从事地震资料分辨率提高、岩石物理、地震反演、软件系统开发等方面的工作。
引用本文:   
刘浩杰, 陈雨茂, 王延光, 宗兆云, 吴国忱, 侯庆杰. 粘弹介质叠前四参数同步反演及应用[J]. 物探与化探, 2021, 45(1): 140-148.
LIU Hao-Jie, CHEN Yu-Mao, WANG Yan-Guang, ZONG Zhao-Yun, WU Guo-Chen, HOU Qing-Jie. Prestack four-parameter synchronous inversion method based on viscoelastic medium theory and its applications. Geophysical and Geochemical Exploration, 2021, 45(1): 140-148.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2021.2470      或      https://www.wutanyuhuatan.com/CN/Y2021/V45/I1/140
Fig.1  第一类AVO纵波反射系数随入射角的变化关系
a—Qp=10;b—Qp=20;c—Qp=50;d—图a局部放大;e—图b局部放大;f—图c局部放大
Fig.2  基于粘弹介质叠前四参数同步反演方法流程
Fig.3  Marmousi2模型正演参数
a—纵波速度;b—横波速度;c—密度;d—Q
Fig.4  Marmousi2模型四参数同步反演结果
a—纵波速度;b—横波速度;c—密度;d—Q
Fig.5  实际工区地震剖面及叠前反演剖面
a—地震剖面;b—弹性反演流体因子;c—吸收衰减系数
Fig.6  实际工区吸收衰减参数连井剖面
a—上升盘连井剖面;b—下降盘连井剖面
Fig.7  实际工区四参数同步反演沿NgI层切片
a—纵波速度;b—横波速度;c—密度;d—吸收衰减系数
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