地球物理学进展 ›› 2010, Vol. 25 ›› Issue (1): 71-75.doi: 10.3969/j.issn.1004-2903.2010.01.012

• 开发地球物理专题 • 上一篇    下一篇

薄(互)储层的反射系数谱AVO分析

吴飞勇1;马培元2;黄明亮2   

  1. (1.中石油辽河油田公司勘探开发研究院,盘锦 124010; 2.东方地球物探公司辽河分公司,盘锦 124010)
  • 收稿日期:2009-05-23 修回日期:2009-09-08 出版日期:2010-02-20 发布日期:2010-02-20
  • 通讯作者: 吴飞勇

Thin reservoir AVO analysis of spectral reflection coefficient

WU Fei-yong1;MA Pei-yuan2;〓HUANG Ming-liang2   

  1. (1.Exploration & Development Research Institute, Liaohe Oilfield, PetroChina,Panjin 124010,China;
    2. Bureau of Geophysical Prospecting Liaohe Company,Panjin 124010,China)
  • Received:2009-05-23 Revised:2009-09-08 Online:2010-02-20 Published:2010-02-20

摘要: 针对油气田开发中薄互层认识难的问题,提出从AVO分析解决困难,克服现有方法在反射系数公式中无厚度变量、时间域计算反射系数谱受采样率限制的不足,运用两个界面间位移与应力关系,从频率域地震波传播方程推导了任意入射角和薄层厚度下的反射系数谱.确定了薄层的几何特性、物理特性与地震响应间的关系,为研究薄层厚度、速度对薄层弹性波反射系数的影响提供了一定的理论基础.

Abstract: AVO analysis is suggested for solving to solve the difficulty in identification of thin alternating layers in exploration of oilfields. It can improve the current method that has no thickness variable in the formula of reflective and is limited by sampling rates in calculation of the coefficient in the time of domain. Using the relationship of stress and displacement on two interfaces, this paper derives the spectrum of reflective coefficient for any incidence angle and thiekness of thim layer based on the equation of seismic wave propagation in the frequency domain. It determines the relationship between geometry, physical progerties and seismic response. The result provides a theoretical basis for the study of effects of thin-layer thickness and velocity on the coefficient.

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