3D Seismic Processing Eric Verschuur AES 1530

3D marine acquisition

3D marine acquisition One sail line fills one strip of midpoints repeat with parallel sail lines Midpoint area

3D seismic acquisition Fold plot or coverage plot: number of traces per bin cell

true midpoints plotted in bin cells 3D seismic acquisition Midpoint scatter: true midpoints plotted in bin cells

3D seismic acquisition Along on in-line, fixed cross-line: plot of offset versus midpoint

3D CMP gathers

3D processing Geometry assign CMP sorting Velocity analysis NMO correction 3D DMO correction Stacking 3D migration

3D migrated result

3D interpretation

3D interpretation

3D interpretation: integrated displays

3D filtering for interpretation

Interpretation of 3D image

Where should we drill? ? ? ?