瓦斯突出煤和非突出煤AVO响应的比较

英文篇名：AVO Response Comparison between Gas Outburst Coal and Non Outburst Coal
中文刊名：中国煤炭地质
英文刊名：Coal Geology of China
作者：杜文凤 ; 彭苏萍 ; 王珂 ; 勾精为 ; 刘进凯
英文作者：Du Wenfeng1 ; Peng Suping1 ; Wang Ke2 ; Gou Jingwei1 and Liu Jinkai1(1.State Key Laboratory of Coal Resources and Safe Mining ; CUMTB ; Beijing 100083 ; 2.School of Geophysics and Oil Resources ; Yangtze University ; Jingzhou ; Hubei 434023)
中文关键词：瓦斯突出煤 ; 非突出煤 ; AVO ; 煤层 ; 厚度
英文关键词：gas outburst coal ; non outburst coal ; AVO ; coal seam ; thickness
出版日期：2010-06-25
机构：中国矿业大学(北京)煤炭资源与安全开采国家重点实验室;长江大学地球物理与石油资源学院;
年：2010
期：06
出版单位：中国煤炭地质

摘要

基于Zoeppritz方程,对煤层进行AVO正演模拟,得到煤层的AVO响应曲线。瓦斯突出煤与非突出煤的AVO响应对比表明,无论是瓦斯突出煤还是非突出煤,其顶界面AVO响应在总体上表现为地震振幅绝对值随偏移距增加而减小的特点,但是瓦斯突出煤的截距绝对值要大于非突出煤的截距绝对值,瓦斯突出煤的斜率要大于非突出煤的斜率。煤层厚度变化会对AVO响应产生影响,当瓦斯突出煤和非突出煤的厚度相同时,瓦斯突出煤的截距绝对值大于非突出煤;当厚度不同时,瓦斯突出煤的斜率大于非突出煤的斜率。瓦斯突出煤与非突出煤的AVO响应差异,可为地球物理参数进行煤与瓦斯突出危险性预测以提供技术参考。
Based on Zoeppritz equation,the AVO response curve of coal seam can be obtained by forward modeling.AVO response comparison between gas outburst coal and non outburst coal shows that the top interface AVO response both the gas outburst coal and non outburst coal,in general,presents seismic amplitude absolute value decrease when offset become large,but the coal gas outburst intercept absolute value and the slope is greater than non outburst coal.Changes in seam thickness have an impact on the AVO response,when the coal seam thickness is the same,the intercept absolute value of coal-gas outburst is greater than the non outburst coal;when the thickness is different,and the slope of the coal gas outburst is greater than the non outburst coal.AVO response differences between gas outburst coal and non outburst coal can provide for a technical reference in coal and gas outburst risk forecast by geophysical parameters.

引文

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