Technical Paper: Combination of Multi-Component Streamer Pressure and Vertical Particle Velocity - Theory and Application to Data

Society: EAGE
Paper Number: A033
Presentation Date: 2012


In this paper, we generalize the optimal deghosting (ODG) method used for deghosting over/under data to combine pressure (P) and vertical velocity (Z) data recorded with a multi-component streamer to minimize the impact of the noise on the deghosted data. The ODG approach uses pressure and velocity ghost models and the statistics of the residual noise to minimize, in a least-squares sense, the noise on the up-going/deghosted wavefield. ODG and the standard PZ summation (PZSUM) combinations are applied to pressure and velocity data recorded in the North Sea. We show that both methods attenuate the receiver ghost, fill in information at the pressure notch frequencies and that ODG has the least post-combination noise level. We also show pre- and post-stack vertical velocity data with encouraging signal-to-noise ratios. Finally, in order to further improve the PZ deghosted data, we suggest a toolbox approach that takes advantage of both ODG and PZSUM combinations and accounts for the varying signal-to-noise ratios observed on multi-component streamer data.

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