Li Xin1,2, Wang Zhenli1,2,4, Chen Yu-hong2,3, Duan Qiu-liang1
1. Institute of Geology and Geophysics,Chinese Academy of Sciences, Beijing 100029, China;
2. Key Laboratory of Petroleum Resource Research,Chinese Academy of Sciences, Beijing 100029, China;
3. Oil and Gas Resource Research Center
Abstract：There are some drawbacks in curvature calculation based on L2 norm.Using 2D median filtering or distance-weighted median filtering,this conventional method leads fitting surface deformation and large curvature errors for data with anomalies.To solve this problem,seismic curvature calculation based on Huber norm is proposed in this paper,which treats large residuals with L1 norm and small residuals by L2 norm.Model tests suggest that the method can describe more fine properties about abnormal values and jump values than the least squares method.Field data tests indicate that finer and more accurate seismic curvature results can be obtained by the method.
