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Journal of the Australian Society of Exploration Geophysicists
RESEARCH ARTICLE

Drill-rig noise suppression using the Karhunen-Loéve transform for seismic-while-drilling experiment at Brukunga, South Australia

Baichun Sun 1 5 Andrej Bóna 1 Binzhong Zhou 2 Andrew King 3 Christian Dupuis 4 Anton Kepic 1
+ Author Affiliations
- Author Affiliations

1 Department of Exploration Geophysics/DET CRC, Curtin University, GPO Box U 1987, Perth, WA 6845, Australia.

2 CSIRO Energy Flagship/DET CRC, PO Box 883, Kenmore, Qld 4069, Australia.

3 CSIRO Mineral Resources Flagship/DET CRC, PO Box 1130, Bentley, WA 6102, Australia.

4 Université Laval, Département de géologie et de génie géologique, Québec, G1V 0A6, Canada.

5 Corresponding author. Email: baichuns@gmail.com

Exploration Geophysics 47(1) 44-57 https://doi.org/10.1071/EG14086
Submitted: 1 April 2014  Accepted: 13 January 2015   Published: 19 February 2015

Abstract

Diamond-impregnated drill bits are known to be low energy vibration seismic sources. With the strong interference from the drill rig, it is difficult to obtain the drill-bit wavefield with a surface receiver array. To overcome the challenge of surface wave interference generated from the rig for seismic-while-drilling (SWD), we need to separate the rig- and bit-generated signals. To this end, we apply two wavefield separation methods, the Karhunen-Loéve (KL) transform and the fk filter, and compare their performance. The applicability of these methods is based on the drill rig and drill bit having different spatial positions. While the drill-bit spatial position changes during the process of drilling, the drill rig remains stationary. This results in the source wavefields from the drill rig and the drill-bit having different characteristics, and allows us to separate and extract the drill-bit signal. We use a synthetic model to compare the KL transform and fk filter. Both techniques are robust when the noise wavefield has consistent amplitude moveout. However, for changing amplitudes, such as the rig noise, which has an unrepeatable wavefield due to power amplitude variation, we show that the KL transform performs better in such situations. We also show the results of signal analysis of the SWD experiment data acquired from Brukunga, South Australia. We demonstrate the feasibility of the KL transform in separating the coherent noises from the stationary drill rig in a hard rock drilling environment, particularly emphasising the suppression of the surface and direct waves from the rig. The results show that drill-rig noise can be effectively suppressed in the correlation domain.

Key words: diamond drill bit, fk filter, KL transform, noise suppression, SWD.


References

Al-Yahya, K. M., 1991, Application of the partial Karhunen-Loéve transform to suppress random noise in seismic sections: Geophysical Prospecting, 39, 77–93

Anchliya, A., 2006, A review of Seismic While Drilling (SWD) techniques: a journey from 1986 to 2005: 68th Annual Conference and Exhibition, EAGE, Expanded Abstracts, SPE100352.

Garnier, J., and Papanicolaou, G., 2009, Passive sensor imaging using cross correlations of noisy signals in a scattering medium: SIAM Journal on Imaging Sciences, 2, 396–437

Haldorsen, J. B., Miller, D. E., and Walsh, J. J., 1995, Walk-away VSP using drill noise as a source: Geophysics, 60, 978–997

Hardage, B., 2009a, Drill-bit seismic still has teeth: AAPG Explorer – Geophysical Corner [Web document]. Available at <http://aapg.org/publications/news/explorer/column/articleid/558/drill-bit-seismic-still-has-teeth>. Accessed September 2014.

Hardage, B., 2009, Seismic-while-drilling: techniques using the drill bit as the seismic source: AAPG Explorer, , 40411

Jones, I., and Levy, S., 1987, Signal-to-noise ratio enhancement in multichannel seismic data via the Karhunen-Loéve transform: Geophysical Prospecting, 35, 12–32

Kirlin, R. L., and Done, W. J., 1999, Covariance analysis for seismic signal processing. Geophysical Development series, v. 8: Society of Exploration Geophysicists.

Miranda, F., Aleotti, L., Abramo, F., Poletto, F., Craglietto, A., Persoglia, S., and Rocca, F., 1996, Impact of the seismic-while-drilling technique on exploration wells: First Break, 14, 55–68

Montagne, R., and Vasconcelos, G. L., 2006, Optimized suppression of coherent noise from seismic data using the Karhunen-Loéve transform: Physical Review E, 74, 016213

Naville, C., Serbutoviez, S., Throo, A., Vincké, O., and Cecconi, F., 2004, Seismic while drilling (SWD) techniques with downhole measurements, introduced by IFP and its partners in 1990–2000: Oil & Gas Science and Technology, 59, 371–403

Poletto, F., 2005, Energy balance of a drill-bit seismic source, part 2: drill-bit versus conventional seismic sources: Geophysics, 70, T29–T44

Poletto, F., and Miranda, F., 2004, Seismic while drilling: fundamentals of drill-bit seismic for exploration: Elsevier.

Poletto, F., Malusa, M., Miranda, F., and Tinivella, U., 2004, Seismic-while-drilling by using dual sensors in drill strings: Geophysics, 69, 1261–1271

Poletto, F., Miranda, F., Corubolo, R., and Abramo, F., 1997, Seismic while drilling using PDC signals-seisbit® experience and perspectives: 59th Conference and Exhibition, EAGE, Expanded Abstracts, e053.

Rector, J. W., 1990, Utilization of drill-bit vibrations as a downhole seismic source: Ph.D. thesis, Stanford University.

Rector, J. W., 1993, Use of drill bit vibrations in the drilling of deep continental boreholes: Engineering Geoscience, Department of Materials Science and Mineral Engineering, University of California-Berkeley.

Rector, J. W., and Marion, B. P., 1991, The use of drill-bit energy as a downhole seismic source: Geophysics, 56, 628–634

Roth, P., 1971, Effective measurement using digital signal analysis: IEEE Spectrum, 8, 62–72

Schuster, G., Yu, J., Sheng, J., and Rickett, J., 2004, Interferometric/daylight seismic imaging: Geophysical Journal International, 157, 838–852

Taylor, G., and Cox, R., 2003, The Brukunga pyrite mine – a field laboratory for acid rock drainage studies: 6th ICARD, 12–18 July 2003, Cairns, Queensland, Australia, 93–106.

Vasconcelos, I., and Snieder, R., 2008, Interferometry by deconvolution: part 2 – theory for elastic waves and application to drill-bit seismic imaging: Geophysics, 73, S129–S141

Wapenaar, K., and Fokkema, J., 2006, Green’s function representations for seismic interferometry: Geophysics, 71, SI33–SI46

Wapenaar, K., Thorbecke, J., and Draganov, D., 2004, Relations between reflection and transmission responses of three-dimensional inhomogeneous media: Geophysical Journal International, 156, 179–194

Weatherby, B. B., 1936, Method of making sub-surface determinations. US Patent 2.062.151.

Weaver, R. L., and Lobkis, O. I., 2001, Ultrasonics without a source: thermal fluctuation correlations at Mhz frequencies: Physical Review Letters, 87, 134301
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