The Effect of Deghosting on the 4D Response: Usan Field, Nigeria
P. Agnisola, R. O'Driscoll, P. Smith, D. Chu, E. Assiak, C. Ugwueze and P. Ukerun
Event name: 80th EAGE Conference and Exhibition 2018
Session: Poster: Time-lapse Acquisition and Processing
Publication date: 11 June 2018
Info: Extended abstract, PDF ( 1.8Mb )
Price: € 20
In this study we present the benefits of removing the source and receiver ghosts early in the 4-D processing sequence. Results from running a test in parallel comparing deghosted with a non-deghosted dataset clearly demonstrate that deghosting is a significant aid to improved 4-D interpretation at the reservoir interval. The time-lapse surveys used in this deghosting test were acquired in 2012 and 2014, over the Usan field, offshore Nigeria, using near identical acquisition parameters, which resulted in good repeatability and 4-D fold of coverage.