Seismic while drilling imaging in hard rock environment
Assoc. Prof. Andrej Bona
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Department of Exploration Geophysics
Seismic-While-Drilling is an important technique to obtain updated geological information around borehole. This thesis tackles the challenges of the weak vibration from a diamond drill-bit, and investigates the feasibility of capturing diamond drill-bit signal in hard rock environments. The research includes investigation of the rig noise suppressing, velocity analysis and imaging using the drill-bit signal, and the drill-bit energy radiation. These studies highlighted the importance of future research for applications of SWD in mineral exploration.
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Sun, Bai Chun; Bóna, Andrej; Zhou, B.; King, A. (2014)We use the direct wave interferometry migration with coherency measurement to image the diamond drill-bit. The success of such imaging can prove if the direct waves from the drill-bit can be detected. The drilling signals ...
A comparison of radiated energy from diamond-impregnated coring and reverse-circulation percussion drilling methods in hard-rock environmentsSun, Bai Chun; Bona, Andrej; Zhou, B.; van de Werken, M. (2015)We compared and analyzed hard-rock drilling elastic energy emission between diamond-impregnated coring and reverse- circulation (RC) percussion drilling methods from an experiment at Brukunga, South Australia. The two ...
Diamond Drill-bit Seismic-While-Drilling Velocity Analysis Using Semblance and MUSIC from Hillside, South AustraliaSun, Bai Chun; Bona, Andrej; King, A.; Zhou, B. (2014)In this paper, we demonstrate the resolution differences between MUSIC and semblance using synthetic examples. Both methods are applied to detect coherent move-out from the drill-bit. The coherency can be used to obtain ...