石油学报 ›› 1994, Vol. 15 ›› Issue (2): 11-20.DOI: 10.7623/syxb199402002

• 地质勘探 • 上一篇    下一篇

AVO多参数反演在气层检测和储层定量研究中的应用

沈凤1, 钱绍新2, 刘雯林2, 韩文杰2   

  1. 1. 中国地质科学院研究生院;
    2. 石油勘探开发科学研究院
  • 收稿日期:1992-03-12 修回日期:1993-09-15 出版日期:1994-04-25 发布日期:2013-07-08
  • 作者简介:沈凤,女,1965年10月生.1986年毕业于华东石油学院.现为中国地质大学博士生.通讯处:西安石油学院.邮政编码:710061.

THE APPLICATION OF AVO MULTIPLE PARAMETER INVERSION IN GAS SAND DETECTION AND RESERVOIR QUANTITATIVE EXAMINATION

Shen Feng1, Qian Shaoxin2, Liu Wenlin2, Han Wenjie2   

  1. 1. China Academy of Geosciences, Graduate School;
    2. Research Institute of Petroleum Exploration and Development, Beijing
  • Received:1992-03-12 Revised:1993-09-15 Online:1994-04-25 Published:2013-07-08

摘要: 利用Aki和Richards的近似方程进行多种AVO岩性参数的反演,可获得零偏移距纵波剖面、横波剖面、纵波和横波相对速度剖面、气层指示剖面和截距与斜率乘积剖面,用于地质解释.为了获取定量的岩石物理参数,将反演得到纵波零偏移距剖面和经重采样后的反射横波剖面进行合成声波测井处理,得到纵、横波速度剖面.利用纵、横波速度与孔隙度和泥质含量的数学模型及已得到的纵、横波速度,定量计算储层的孔隙度和泥质含量,并得到相应的孔隙度和泥质含量剖面.利用不同地区的两个研究实例,按S.R.Rutherford对气藏的定义对其进行分类,并利用AVO反演结果说明其不同的AVO特征.并系统地说明了上述剖面在气藏检测和储层定性→定量解释中的应用.

关键词: 反演, 参数, 剖面对比, 定量分析, 综合解释

Abstract: AVO lithologic parameters can be inverted with the help of Aki and Richards formula and the Singular Value Decomposition(SVD) method.Inversion can provide following sections:Zero-offset reflectivity section of p-wave,reflectivity section of S-wave,relative velocity sections of p-wave and S-wave, identification sections of gas sandstone. P-wave and S-wave velocities,used in reservoir prediction and detection. Synthetic sonic log can be obtainedby sampled S-wave section,a procession of the synthetic accoustic profile obtained through acombination of Zero-offset,P-wave profile and the resample reflective S-wave profile relationships between p-wave and S-wave velocities in clastic rocks,clay contents and porositiesare estimated and their sections are achieved.The paper shows the application of these sections in geological interpretations and detection of gas sandstone which have different AVO characteristics. Case study has confirmedthat the qualitative to quantitative interpretation methods are effective.

Key words: inversion, parameter, profile correlation, quantitative analysis, comprehensive interpretation