Curvelet域海底电缆多次波压制方法研究  

Research on OBC multiple wave attenuation method in Curvelet domain

作　　者：郝振江 冯飞[2] 王德利[2] 赵伟 

机构地区：[1]中海油研究总院,北京100027 [2]吉林大学地球探测科学与技术学院,长春130026

出　　处：《世界地质》2013年第1期130-136,共7页World Geology

基　　金：国家科技重大专项课题(2011ZX05023-005);国家科技重大专项子课题(2011ZX05023-005-008)联合资助

摘　　要：将检波点置于海底的海底电缆(OBC)地震采集技术面临全体自由表面多次波的困扰。通过采用改进后的SRME方法进行OBC数据自由表面多次波的衰减,SRME方法分为预测和相减过程,在相减过程中采用常规减去法、二维Curvelet阈值相减法以及三维Curvelet阈值相减进行多次波相减。通过模型试算对3种方法进行比较,发现在Curvelet阈值相减法中,对多次波的减去效果更好,尤其是三维Curvelet变换阈值相减的效果更为突出。The ocean bottom cable （OBC） seismic acquisition technique by putting the receiver point at the ocean is facing the problem of interference by free surface multiple wave. We use the improved SRME method to do the OBC data free surface multiple attenuation. The SRME method is divided into forecast and subtraction processes, and conventional minus, 2D and 3D Curvelet threshold value subtractions are often used in subtraction process. Through the comparisons of the three methods by modeling, it is found that the Curvelet threshold subtraction, especially the 3D transform Curvelet threshold value subtraction has better result.

关 键 词：OBC多次波 SRME Curvelet阈值 匹配相减 

分 类 号：P631.4[天文地球—地质矿产勘探]