Long Offset Recording in a Standard Seismic 3D Survey

In a 3-D seismic infill survey, a two dimensional, E-W trending salt intrusion in Mesozoic formations endangered the visibility of the underlaying target zone. Modification to the standard acquisition scheme incorporating all laid geophone lires resulted in more than 800 active traces per record and extended offsets up to 10.200 metres. Special processing of these extra long offsets show significant improvement in time-domain reflection continuity for pre-salt events.