Ion Geophysical Corporation

David Ridyard

Nikolaos Bernitsas

David Brookes

Carlos Calderón

Douglas F Allinson

David James Brookes

Embodiments of dynamic gain adjustments in seismic surveys are described. One method of acquiring a seismic survey includes determining an arrival time at a seismic receiver of a downgoing seismic wavefield associated with a seismic source based at least in part on an estimated position of the seismic source, an estimated position of the seismic receiver, or combinations thereof. The method also includes adjusting a gain of the seismic receiver based at least in part on the determined arrival time of the downgoing seismic wavefield in order to, for example, help prevent overdriving or clipping of the seismic receiver when the downgoing seismic wavefield arrives at or passes by the seismic receiver.

Dynamic gain adjustments in seismic surveys

Embodiments of real-time infill in marine seismic surveys using an independent seismic source are described. One method of seismic data acquisition includes acquiring primary seismic data at a plurality of streamers towed by an acquisition vessel based at least in part on energy emitted by a first seismic source, and towing an independent seismic source to acquire infill seismic data at the plurality of streamers based at least in part on energy emitted by the independent seismic source while the primary seismic data is still being acquired at the plurality of streamers based at least in part on the energy emitted by the first seismic source, wherein the independent seismic source is towed independently of the acquisition vessel.

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Sugar Land, TX, United States of America

David Ridyard