Source signal estimation - attenuation of the sea-bottom reflection error from near-field measurements
Knowing the far-field signature (pulse shape) of a marine seismic source array allows deconvolution of the shot-to-shot variations of the signature, improving consistency of data quality. With the increasing need for higher quality data, suitable for high resolution reservoir monitoring and time-lapse imaging, source-singature deconvolution becomes a requirement. Discussion of the relative merits of the Notional Source Method compared to other methods of estimating the farfield signature are not presented in this article, the reader is reffered Laws et al. (1998) for such a discussion. For further details of the method itself the reader is referred to Zilkowski et al. (1982) and Parkes et al. (1984). The Notional Source Method is proprietary to Schlumberger and is implemented in theTRISOR digital airgun control system.