Deblending using a structural-oriented median filter

Abstract

We propose to use a structural-oriented median filter to attenuate the blending noise along the structural direction. The principle of the proposed approach is to first flatten the seismic record in local spatial windows and then to apply a traditional median filter (MF) to the third flattened dimension.The key component of the proposed approach is the estimation of the local slope, which can be calculated by first scanning the NMO velocity and then transferring the velocity to the local slope. Both synthetic and field data examples show successful performance using the proposed approach.