论文部分内容阅读
查明煤层瓦斯富集区域,对可能的瓦斯突出点进行预报,是当前煤矿生产中亟待解决的重要课题.利用地震P波对裂缝性地层所表现出的方位各向异性特征和AV0特征,应用地震P波方位/角度信息评价煤层裂隙发育带.通过对阳泉新景煤矿三维地震资料的处理,获得4个方位的偏移数据体和8个方位/角度的偏移数据体,从中提取了3种对煤层裂隙响应灵敏的地震属性,综合利用3种地震属性计算出裂隙的发育密度.预测结果表明,利用P波方位/角度信息比仅利用P波方位信息评价煤层裂隙发育带更具有优势,它能同时利用煤层反射波的各向异性特征和AVO特征,更有利于进行煤层的岩性解释.
Identifying the gas-rich area of coal seam and forecasting the possible gas outburst is an important issue to be solved urgently in the current coal mine production.Using the azimuthal anisotropy and AV0 characteristics of the seismic P wave to the fractured strata, Seismic P wave azimuth / angle information is used to evaluate the coal seam fracture development zone.Through processing the 3D seismic data of Xinjing Coal Mine in Yangquan, four offset data bodies and eight azimuth / offset data bodies are obtained, and 3 The results show that the use of P-wave azimuth / angle information is more advantageous than using only P-wave azimuth information to evaluate the fracture development zone of coal seam, It can also make use of the anisotropy characteristics and AVO characteristics of coal seam reflected waves and is more conducive to lithology interpretation of coal seams.