Broadband acquisition, processing improving marine seismic surveys

Refinements to marine seismic work through broadband acquisition and processing are improving the precision of geophysical interpretation and the imaging of deep features. The incoming president of the Society of Exploration Geophysicists says they all involve sampling sonic energy in more ways than one. Emerging in just the past couple of years, the refinements address a problem known as ghosting, explains David Monk, director of geophysics at Apache Corp. Survey-design adjustments to moderate ghosting, which creates false indications of subsurface reflections, result in the loss of low frequencies in the spectrum of seismic data. Because low frequencies survive the natural filtering tha...

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