HR: 10:20h
AN: S12A-01    [Abstracts]
TI: The Receiver Function Method for Multicomponent Ocean Bottom Cable Seismic Data
AU: Edme, P
EM: PEdme@cambridge.oilfield.slb.com
AF: Schlumberger Cambridge Research, High Cross, Cambridge, CB3 0EZP, United Kingdom
AU: * Singh, S C
EM: singh@ipgp.jussieu.fr
AF: Institut de Physique du Globe de Paris, 4 Place Jussieu, Paris cedex 05, 75252, France
AB: The Receiver function method has been originally developed to analyze earthquake data recorded by multicomponent (3C) sensors and consists of deconvolving the horizontal component by the vertical component for a selected phase. The deconvolution process removes travel path effects from the source to the base of the target as well as the earthquake source signature. In addition, it provides the possibility of separating the emergent P and PS waves based on adaptive subtraction between recorded components if plane waves of constant ray parameters are considered. The resulting RF signal is the local PS wave impulse response generated at impedance contrasts below the 3C receiver. We have extended this method to the wide-angle multicomponent seismic reflection acquisition geometry that has source above the interfaces instead of below as in earthquake seismology and contains many interfering primary (reflected) arrivals. The method has been developed in the (τ-p) domain that helps to decompose the wavefield in to P and S-waves. An iterative deconvolution is used to remove the source effects, and results in pure P and S-wave fields, and leads to P and S-wave receiver function. The presence of pressure wavefield recorded by 4C ocean bottom cable data helps in the reconstruction of the both P and S-wave receiver function. The method has been tested on synthetic data example and then applied to multicomponent ocean bottom cable data. Our method provides much-improved P and S-wave image of the sub-surface. The resulting P and S-wave receiver function could be further used for amplitude versus offset analysis or for full waveform inversion.
DE: 0935 Seismic methods (3025, 7294)
DE: 3025 Marine seismics (0935, 7294)
DE: 4594 Instruments and techniques
DE: 7294 Seismic instruments and networks (0935, 3025)
DE: 8194 Instruments and techniques
SC: Seismology [S]
MN: 2007 Fall Meeting