煤体中直立裂隙的多波地震响应及预测  

The Multi-Components Seismic Response of Vertical Fracture in Coal Beds and Its Probing

作　　者：何兵寿[1] 彭苏萍[2] 张会星[1] 张晓明[1] 

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]中国矿业大学(北京),北京100083

出　　处：《地质学报》2008年第10期1416-1421,共6页Acta Geologica Sinica

基　　金：国家重点基础研究发展规划“973”项目(编号2002CB211707);国家高技术研究发展计划“863”项目(编号2006AA06Z203)资助的成果

摘　　要：裂隙探测是煤层气勘探开发与煤矿安全生产的重要研究内容。规则发育的直立裂隙在理论上可等效为具有水平对称轴的横向各向同性(HTI)介质,本文通过正演记录研究了HTI介质的多波地震响应,分析了裂隙发育方位对横波偏振特性的影响规律,在此基础上分析了利用横波记录的方位角道集获取地下裂隙参数的可行性与基本原理,为便于工业应用,文中研究了一种基于两个水平分量叠加剖面的角度扫描法求取地下目标煤层的裂隙发育方位。实际资料处理证明了该方法的准确性与可靠性。Fracture detection plays an important role in combed methane exploitation and coal mine safe production. The well-developed vertical fractures are theoretically equivalent to transversely isotropic media with a horizontal symmetry （HTI）. Using seismograms of HTI model, the paper studies multicomponent seismic response of vertical fractures in coal beds, and polarization characteristics of P-SV wave. Based on the analysis above, this study analyzes practicability and mechanics of fracture azimuth inversion method using azimuth gather for the purpose of industrial application. The paper proposes a fracture parameters inversion technique using the stack profile of two horizontal components to gain occurrence of fractures of coal beds underground, and this method has been proved to be precise and reliable in field data processing.

关 键 词：多波多分量 裂隙 转换波 横波分裂 横向各向同性 

分 类 号：P631.4[天文地球—地质矿产勘探]