地球物理学进展 ›› 2010, Vol. 25 ›› Issue (4): 1323-1331.doi: 10.3969/j.issn.1004-2903.2010.04.021

• 应用地球物理 • 上一篇    下一篇

AVO属性分析方法的改进及其在煤系地层中的应用

舒梦珵1, 王真理1, 张金强2, 郝天珧1   

  1. 1. 中国科学院地质与地球物理研究所, 北京 100029;
    2. 中国石化石油勘探开发研究院,北京 100083
  • 收稿日期:2009-11-15 修回日期:2010-03-20 出版日期:2010-08-20 发布日期:2010-08-20
  • 通讯作者: 王真理,男,博士,副研究员,长期从事复杂构造成像、储层特征信息提取、地震信号处理以及开发地球物理等方面的研究. (E-mail:jerryw@mail.iggcas.ac.cn) E-mail:shumengcheng@sina.com
  • 作者简介:舒梦珵,男,1985年生,天津人,硕士,主要从事地球物理信息处理与解释.(E-mail:shumengcheng@sina.com)
  • 基金资助:

    国家科技重大专项专题项目《深层有效储集体形成、分布规律与预测技术》(2008ZX05008-003)资助.

Improvement on the method for AVO attribute analysis and its application to coal-bearing strata

SHU Meng-cheng1, WANG Zhen-li1, ZHANG Jin-qiang2, HAO Tian-yao1   

  1. 1. institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029,China;
    2. SINOPEC Exploration & Production Research Institute, Beijing 100083, China
  • Received:2009-11-15 Revised:2010-03-20 Online:2010-08-20 Published:2010-08-20

摘要: 在进行AVO属性分析时,直接应用梯度和截距属性做交会图,往往无法将异常与背景趋势有效的分离开.特别在煤系发育的地层中,由于其顶、底界面通常为良好的波阻抗界面,会形成较强的反射波,从而掩盖周围地层的异常信息.基于以上原因,煤系地层中异常信息的分类提取,尤其是煤层气的识别方法一直备受关注.本文对一项AVO截距斜率交会图技术进行了改进,并深入分析了此方法在煤系地层中的应用.最终本文给出了所选区块不同类型异常的分类方法,并进行了实际验证,结果表明该方法用于异常反演有很好的效果.

Abstract: In the AVO attributes analysis crossplots made by the raw intercept and gradient which are calculated by the pre-stack seismic data cannot separate anomalies from the background trend. Specially, in the coal-bearing strata coal seams typically have so higher elastic impedance than surrounding ones that the anomalous information around them can't be detected since their reflected waves. So the problem, how to detect and identify anomalies, especially that on coal-bed gas is a subject much concerened. This paper focuses on studying the improvement of the method for AVO attribute analysis and shows its application to coal bearing strata. Also we classify the anomalies in the given survey, and test this classification. The result shows that this method can be used in anomaly inversion and get good effect.

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