Patent ID: 9207349
Filing Date: 2015-12-08
Classification: G01V

Abstract:
1. A method for using a marine seismic surveying system having a plurality of seismic sensors which are spaced apart and towed, the method comprising: determining at least a value for a depth of each of the plurality of seismic sensors in a body of water, the seismic sensors each including a pressure responsive sensor and a motion responsive sensor; determining a ghost time delay based on at least the value for the depth; cross ghosting seismic signals detected by each motion responsive sensor and each pressure responsive sensor to obtain a cross ghosted motion responsive signal and a cross ghosted pressure responsive signal, wherein the cross ghosting uses a calibration factor for each seismic sensor; computing a difference between the cross ghosted motion responsive signal and the cross ghosted pressure responsive signal for each of the seismic sensors; adjusting at least the value for the depth of each of the seismic sensors based on the difference; repeating determining the ghost time delay, cross ghosting the seismic signals, and computing the difference; repeating the adjusting at least the value for the depth, determining the ghost time delay, cross ghosting the seismic signals, and computing the difference until the difference falls below a selected threshold; operating lateral control devices to perform lateral movement of the seismic sensors; computing the difference for each seismic sensor after said lateral movement; and determining whether the difference for each seismic sensor is thereby reduced, wherein the method is performed during operation of the marine seismic survey system.