Ground-roll suppression based on the second generation Curvelet transform
Dong Lie-qian1, Li Zhen-chun1, Wang De-ying1, Liu Lei2, Gao Jun-wei3
1. School of Geosciences of China University of Petroleum(East China), Qingdao, Shandong 266555, China;
2. Shengli Well Logging Co., Dongying, Shandong257096, China;
3. No 2 Gas Production Plant, Changqing OilfieldCompany, Petrochina, YuLin, Shaanxi 719000, China
Abstract：In view of the loss of effective signal of conventional ground-roll removal techniques,in this paper we develop a new multi-scale and multi-directional method of removing ground roll based on the second generation Curvelet transform.Firstly,the seismic data is assigned to multiple scales and directions by Curvelet transform.According to different characteristics of ground rolls and waves in different scales and different directions,a flow of ground-roll removal based on multi-curvelet transform is devised.Making full use of the characteristic of non-overlapping in Curvelet domain,Curvelet coefficient that only contains ground rolls is processed.Finally we get the ground roll removal data.Applying this method to synthetical data and real field data sets indicates that it can suppress ground rolls,meanwhile,also greatly maintain signals.The method is proved to be an effective and preserved-amplitude denoising approach.
董烈乾, 李振春, 王德营, 刘磊, 高君微. 第二代Curvelet变换压制面波方法[J]. 石油地球物理勘探, 2011, 46(6): 897-904.
Dong Lie-qian, Li Zhen-chun, Wang De-ying, Liu Lei, Gao Jun-wei. Ground-roll suppression based on the second generation Curvelet transform. OGP, 2011, 46(6): 897-904.
