基于双相介质理论的煤层甲烷预测技术

Prediction technology of coal bed methane based on double-phase media theory

基于双相介质理论研究了双相各向同性介质中的纵波方程，并对煤层甲烷进行地震波动方程的数值模拟．正演得到的叠后记录双相介质的反射波振幅明显弱于单相介质，表现出低频共振、高频衰减及固相位移与流相位移为反相的特性．与地震资料和实际开采资料对比吻合较好．

The dilatational wave equations in double-phase isotropy media was researched based on double-phase media theory and numerical modeling of seismic wave equation for coal bed methane was made. The after-fold records showed that the reflection amplitude of double-phase media is obviously weaker than that of single-phase media, and the characteristics of low frequency resonance and high frequency attenuation with the reverse solid and fluid ohase displacement. The theor results reach good fit comparing to seismic data and real mining data.