Research and Application of Frequency Dependent AVO Analysis for Gas Recognition
详细信息
- 责任者：Cheng Bingjie (State Key Laboratory of Oil and Ga Reservior Geology and Exploitition ; CDUT ; Chengdu 610059 ; China) ; Xu Tianji
- 刊名：Chinese Journal of Geophysics
- 出版年：2012
- 卷期：55(2)
- 关键词：AVO技术 ; AVO techniques ; 深层气 ; deep gas ; 四川盆地 ; Sichuan Basin
- 页码：p.608-613
- 图表：2 illus., 22 refs.
- 分类号：1600
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
Based on the theory of conventional AVO technology,the calculation method of frequency dependent AVO attributes takes advantage of physical parameters in multi-scale fracture media model which shows frequency dependent characters,establishes the mathematical relationship between reflection coefficient and frequency,derives the function of AVO attributes such as intercept,gradient,hydrocarbon factor,fluid factor,pseudo-Poisson ratio which are all related with frequency.Using the inversion method and geologic,seismic,and logging data,we obtained frequency dependent AVO attributes with higher precision,developed frequency dependent AVO technology for gas recognition by analysis of gas sensitive attributes.A case study of this technology with seismic data from the deep formation in southwest China provides robust indications for reservoir prediction and gas detection,detected high quality gas reservoir zone with porosity greater than 4%from highly tight rock matrix where the porosity is generally 1~4% and the permeability is generally lower than 0.06×10-3μm2.Practical application of frequency dependent AVO technology provides important technical support for solving the difficult problem of gas recognition and improving logging yield ratio.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |