摘要
反射槽波能够探测煤层中的小构造,但反射槽波信噪比低,探测效果不理想。为改进成像质量,分析了适用于反射槽波的预处理技术,从理论和实际应用两方面,通过三维槽波数值模拟和实际数据处理应用,验证了反射槽波绕射波偏移方法的有效性。结果表明:应用绕射波偏移方法时,需对反射槽波做Hilbert变换,使之适应槽波的特殊情况;绕射偏移时只需要一个速度,槽波速度基本恒定,槽波绕射偏移方法相对地面地震有独特优势。
The reflected in-seam waves can detect the small structure in the coal seam.At present,the researches onthe reflected in-seam waves exploration are less at home and abroad,and the signal-to-noise ratio is low.In order toimprove the image quality,the diffraction migration imaging method of reflected in-seam waves was investigated.Thepreprocessing technologies suitable for reflected in-seam waves were analyzed.Based on three-dimensional numericalsimulations and actual data processing,the feasibilities of reflected in-seam waves were demonstrated for both theoreticalmodels and practical applications.The results showed that reflected in-seam waves should do the Hilberttransform when diffraction migration imaging was used.The in-seam wave velocity is approximately constant and thediffraction migration requires only one velocity,constituting the unique advantages of reflected in-seam waves.
作者
姬广忠
JI Guangzhong(China Coal Research Institute, Beijing 100013, China;Xi’an Research Institute of China Coal Technology & Engineering Group Corp., Xi’an 710077, China)
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2017年第1期121-124,共4页
Coal Geology & Exploration
基金
国家科技重大专项课题(2011ZX05040-002)~~
关键词
反射槽波
绕射偏移
煤层
断层
reflected in-seam waves
diffraction migration
coal seam
fault
