Method for optimum combination of pressure and particle...

Details Method for optimum combination of pressure and particle... Method for optimum combination of pressure and particle...

2011-06-07

2011-06-07

Keith, Jack (Department: 3663)

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

C367S021000, C702S014000, C702S017000

Reexamination Certificate

active

07957221

ABSTRACT:
A method for determining upgoing pressure components of seismic signals from signals detected by combined pressure responsive sensors and motion responsive seismic sensors disposed in a plurality of laterally spaced apart streamers includes determining a threshold time at which angle of incidence error in the motion responsive signals in the cross-line direction falls below a selected threshold. Below the threshold time, the motion responsive signals are corrected for angle of incidence in the in-line and cross-line directions. Above the threshold time, the motion responsive signals are corrected for angle of incidence only in the in-line direction. Both sets of incidence corrected measured motion responsive signals, and the pressure responsive signals are used to determine upgoing or downgoing pressure components or upgoing or downgoing motion components of the measured motion responsive and pressure responsive seismic signals.

REFERENCES:
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patent: 7359283 (2008-04-01), Vaage et al.
patent: 2411722 (2005-09-01), None
patent: WO 2008/134177 (2008-11-01), None
Tilman Klüver, (2008), “Wavefield separation for dual-sensor data with local handling of aliased energy”, SEG Law Vegas 2008 Annual Metting XP-002572134, pp. 1083-1087.
European Search Report, Mar. 9, 2010.

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