复杂地表初至层析地震静校正技术及其应用  

Research and application of first arrival tomographic static technique in complex surface area

作　　者：张胤彬[1,2] 潘冬明[3] 胡明顺[3] 李永铭[4] 李娟娟[3] 

机构地区：[1]山西省煤炭地质物探测绘院,山西晋中030600 [2]中南大学地球科学与信息物理学院,湖南长沙410083 [3]中国矿业大学资源与地球科学学院,江苏徐州221008 [4]中国水电顾问集团贵阳勘测设计研究院,贵州贵阳550081

出　　处：《煤田地质与勘探》2012年第4期66-70,共5页Coal Geology & Exploration

摘　　要：复杂地表条件的煤层气地震勘探资料处理对静校正有较高要求。折射静校正具有较好的静校正效果,但对于地表起伏大、纵横向速度变化剧烈的复杂地区则难以取得较好的效果。建立横向速度变化大且基岩裸露的地震模型进行理论试算,分析了层析静校正的特点及适用条件,指出了层析静校正中应该注意的关键问题。实例验证结果表明:层析静校正更适合复杂地表煤层气地震资料的处理。Refraction static technology has good effect on statics correction,but it is difficult to get preferable effect in the complex region with rolling suface and dramatic velocity changes in vertical and horizontal direction.A forward model with large horizontal velocity change and bared bedrock was built and computed in t his paper to analyze the characteristics and application conditions of tomographic static correction.The key problems of tomographic statics we should pay attention to were pointed out.The results showed that tomographic static correction method was more suitable for coalbed methane seismic data processing of areas with complex surface,which has significant meaning for improving precision of coalbed methane seismic exploration.

关 键 词：复杂地表 煤层气 地震勘探 静校正 层析反演 

分 类 号：P631[天文地球—地质矿产勘探]