摘要
针对VTI介质和海洋大炮检距地震数据反射波同相轴不能严格满足双曲时距关系,一次波和多次波能量在Radon域中聚焦性较差,多次波的压制效果不理想的问题,通过在双曲Radon变换积分路径中引入各向异性参数η,描述VTI介质和海洋大炮检距地震数据的时距曲线关系,在Radon域中有效聚焦一次波和多次波能量。同时,引入基于共轭导向梯度(CGG)算法的各向异性高分辨率Radon变换,基于L_1范数对模型空间进行稀疏约束,提高Radon变换的分辨率。模型数据和海上大炮检距实际资料测试表明,该方法能够很好地压制多次波。
For VTI media, large offset reflection events in marine seismic cannot meet hyperbolic time distance relationship, and primary wave and multiple wave energy cannot well focus in the Radon domain, which leads poor multiple attenuation. We propose an approach to solve this problem. First we introduce the anisotropic parameters into the time distance relationship when we describe VTI medium and marine large offset seismic time-distance curve relationship, so that the primary wave and multiple wave energy can focus well in the Radon domain. Then based on L1 norm sparse constraint in the model space, we introduce anisotropic high-resolution Radon transform based on conjugate guided gradient (CGG) algorithm to improve the Radon transform resolution. Tests on model and real data show that the proposed approach can effectively attenuate multiples. © 2016, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2016年第4期665-669,2,共5页
Oil Geophysical Prospecting
基金
国家自然科学基金(41204086
41374122)联合资助
关键词
各向异性
RADON变换
高分辨率
多次波压制
Anisotropic media
Anisotropy
Mathematical transformations
Seismology
Wave energy conversion
