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.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2012年第4期66-70,共5页
Coal Geology & Exploration
关键词
复杂地表
煤层气
地震勘探
静校正
层析反演
Complex surface
coalbed methane
seismic prospecting
statics
tomographic inversion
