薄互层油藏模型黏弹性波方程正演模拟研究

英文篇名：Forward simulation of viscoelastic wave equation in thin-interbedded reservoir model
中文刊名：石油地球物理勘探
英文刊名：Oil Geophysical Prospecting
作者：狄帮让 ; 裴正林 ; 夏吉庄 ; 王慧 ; 毕丽飞
英文作者：Di Bang-rang1 ; Pei Zheng-lin1 ; 2 ; Xia Ji-zhuang3 ; Wang Hui3 and Bi Li-fei3.1.CNPC Key Lab of Geophysical Exploration ; China University of Petroleum Beijing City ; 10083 ; China2.Beijing North Lintai Petroleum Technology Co. ; Ltd ; Beijing City ; 100192 ; China3.GRI of Shengli Oilfield Co. ; Ltd ; Dongying City ; Shandong Province ; 257022 ; China
中文关键词：薄互层 ; 黏弹性 ; 质心频率 ; 小波瞬时衰减 ; Q值 ; 非均匀介质
英文关键词：thin-interbed ; viscoelasticity ; centroid frequency ; wavelet instantaneous attenuation ; Q-value ; non-homogeneous medium
出版日期：2009-10-15
机构：中国石油大学CNPC物探重点实验室;北京北方林泰石油科技有限公司;胜利油田有限公司物探研究院;
年：2009
期：05
出版单位：石油地球物理勘探

摘要

本文采用质心频率法和小波瞬时衰减系数法反演计算了薄互层油气储层的Q值,建立了薄互层油气储集体黏弹性介质模型。采用非均匀介质中黏弹性波方程交错网格高阶有限差分法进行了黏弹性波和弹性波正演模拟。数值模拟试验表明,黏弹性波模拟的油气水AVO响应与弹性波模拟的油气水AVO响应存在明显差异。黏弹性波方程数值模拟能够更加真实模拟实际地震波场。纵波和转换波偏移剖面与正演模型吻合很好。
The paper used centroid frequency method and wavelet instantaneous attenuation coefficient method for Q-value inversion in thin-interbedded reservoir and created viscoelastic medium model of thin-interbedded reservoir.The staggered grid high-order finite-difference algorithm of viscoelastic wave equation in non-homogeneous medium was used to carry out forward simulation of viscoelastic and elastic waves.The numeric simulation showed that there is significant difference in AVO response of oil,gas and water between using viscoelastic wave simulation and using elastic wave simulation.The numeric simulation of viscoelastic wave equation is able to more realistically simulate the practical seismic wavefield and migrated sections of P-and PS-converted waves are coincident to forward models.

引文

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