Abstract
Specifying a drilling bit location on the seismic section is required for a safety drilling as well as a proper steering of the well. Seismic While Drilling (SWD) is a seismic survey using a working drill-bit as an energy source. This technology is cost effective and can give us information of the subsurface structures with real time. However, the signal to noise ratio is lower than VSP which is a seismic survey with the same objective as SWD. With several field experiments, we have increased the accuracy of SWD by an appropriate receiver configuration, utilizing stacking process and so on. This paper discusses relations between quality of SWD data and some factors reducing it.
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