A simple and robust method for combining dual-sensor OBC data?

Brian H. Hoffe, Peter W. Cary and Laurence R. Lines

ABSTRACT

In this paper, we propose a simple and robust method for combining dual-sensor ocean-bottom cable (OBC) seismic recordings for multiple attenuation. This method does not require an estimate of the ocean-bottom reflection coefficient but rather computes a time-variant scalar trace for each common hydrophone-vertical geophone trace pair. When this scalar trace is applied, it essentially equalises the amplitudes of the hydrophone-geophone trace pair such that multiple cancellation is achieved upon their summation.

We then tested this method on both a synthetic and real dual-sensor OBC data set to evaluate its effectiveness. These tests showed that the multiple energy is greatly attenuated on both synthetic and real dual-sensor summed records, producing promising results.

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