1. School of Resources and Environment, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450046, China; 2. School of Geephysics and Mearsurement-control Technology, East China University of Technology, Nanchang, Jiangxi 330013, China
Abstract:In marine seismic data,the ghost contaminates primary waves,reduces data resolution,and sometimes even produces false events.Ghost removal during migration for better geological interpretation is one of the challenges in marine seismic exploration at present.In this paper we propose a deghosting approach with Gauss beam migration.Firstly,the Gaussian beam migration algorithm of common shot gathers is put forward.Then compensation terms for source and receiver ghosts are added to the migration formula.At the same time,an appropriate algorithm is given to ensure the stability in order to compensate ghost effects.Finally,numerical experiments demonstrate the feasibility and effectiveness of the proposed approach.After deghosting,the primary wave migration is achieved and data resolution is improved,which is favorable for subsequent interpretation and inversion.
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