Abstract

Seismic while drilling (SWD) with a rotary percussive drill used as the seismic source is presented. In addition to saving time by collecting seismic data while drilling, SWD also has the advantage of collecting a high data density with no additional effort and has a signal with a broad frequency spectrum. The only disadvantage is its signal-to-noise ratio is lower than many other seismic sources, although the signal-to-noise ratio is quite sufficient. The discussed methodology includes the triggering system and the stacking approach used to improve the signal-to-noise ratio. An example of SWD data is presented and compared to traditional down-hole (check-shot) data. Other examples of SWD are presented to demonstrate some of the data acquisition possibilities.

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