Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8915407 | Journal of Applied Geophysics | 2018 | 59 Pages |
Abstract
We present a method inspired by seismic interferometry and ambient-noise correlation that can be used for detecting scatterers, such as boulders and cavities, ahead of a tunnel while drilling. A similar method has been proposed for active-source seismic data and validated using laboratory and field data. Here, we propose to utilize the seismic noise generated by a Tunnel Boring Machine (TBM), and recorded at the surface. We explain our method at the hand of data from finite-difference modelling of noise-source wave propagation in a medium where scatterers are present. Using the modelled noise records, we apply cross-correlation to obtain correlation gathers. After isolating the scattered arrivals in these gathers, we cross-correlate again and invert for the correlated traveltime to locate scatterers. We show the potential of the method for locating the scatterers while drilling using noise records due to TBM.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geophysics
Authors
U. Harmankaya, A. Kaslilar, K. Wapenaar, D. Draganov,