【摘要】 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.更多还原

【Abstract】 It is an important problem to be urgently settled that the coal-bed methane enriched area must be detected and the possible gas outburst position should be predicted during the coal mine production.Based on the azimuth anisotropy and AVO property of seismic P-waves to fractured strata,coal fractures are evaluated by seismic azimuth/incident angle information.After 3D seismic P-wave data in Xinjing coalmine,Yangquan,are processed,4 azimuth migration cubes and 8azimuth/incident angle migration cubes are obtained from which3 attributes responded to coal fracture sensitively are extracted,and then,fracture density are comprehensively calculated by attributes.It is indicated by the predicted result that the method of evaluating coal fractures with seismic P-wave azimuth/incident angle information has superior to the one with seismic P-wave azimuth information only.This method can use the anisotropy and AVO property of the coal reflection simultaneously and is advantageous to the lithology interpretation of coal beds.更多还原