1887
Volume 40, Issue 8
  • ISSN: 0263-5046
  • E-ISSN: 1365-2397

Abstract

Abstract

Distributed Acoustic Sensing (DAS), which uses strain-induced optical distortion effects to use optical fibres as multi-channel seismic arrays, enable efficient and inexpensive high-resolution seismic surveying in the challenging surface conditions, such as salt lakes. In this study, we present a first published 3D seismic survey completed with a fibre optic network.

Since DAS cables freely deployed on surface can be sensitive to ambient noise such as strong wind, which is common in many field conditions, we developed an efficient methodology for cable burring by fast ploughing it in both soft and hard ground conditions. Even a standard telecommunication fibre optic cable deployed beneath the surface by this ploughing method delivers reflection seismic recording performance comparable to conventional geophone systems, offering substantial cost savings in practice.

Combined with light and mobile seismic sources such as Betsy gun, DAS technology deployed in 3D surface reflection configuration across a hyper-saline salt-lake environment delivered a performance akin to modern nodal seismic systems. We show that the introduction of DAS technology into seismic surveying practice in the mineral sector could deliver an order of magnitude saving, while substantially increasing the data density and hence allowing optimum performance of modern seismic imaging algorithms.

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References

  1. Correa, J., Egorov, A., Tertyshnikov, K., Bona, A., Pevzner, R., Dean, T., Freifeld, B. and Marshall, S. [2017a]. Analysis of signal to noise and directivity characteristics of DAS VSP at near and far offsets — A CO2CRC Otway Project data example. The Leading Edge36(12), 994–1001.https://www.earthdoc.org/search?value1=J.+Correa&op-tion1=author&noRedirect=true
    [Google Scholar]
  2. Correa, J, Van Zaanen, L., Tertyshnikov, K., Dean, T., Pevzner, R. and Bona, A. [2017b]. DAS Versus Geophones: a Quantitative Comparison of a VSP Survey at a Dedicated Field Laboratory, Fourth EAGE Borehole Geophysics Workshop.
    [Google Scholar]
  3. Daley, M. Freifeld, T., Ajo-Fanklin, M.J. and Dou, S. [2013]. Field testing of fiber-optic distributed acoustic sensing (DAS) for subsurface seismic monitoring, The Leading Edge, 699–706.
    [Google Scholar]
  4. Freifeld, B.M., Pevzner, R., Dou, S., Carrea, J, Daley, T.M, Robertson, M, Tertishnykov, K, Wood, Ajo-Franklin, T.J., Urosevic, M. and Gurevich, B. [2016]. The CO2CRC Otway Project deployment of a Distributed Acoustic Sensing Network Coupled with Permanent Rotary Sources, 78th EAGE Conference and Exhibition, V1, 1–5.
    [Google Scholar]
  5. Hartog, A. [2018]. An introduction to distributed optical fibre sensors, series in fiber optic sensors. FL, USA: CRC Press Taylor & Francis Group. ISBN 9781138082694.
    [Google Scholar]
  6. Issa, N., Roelens, M.A.F. and Frisken, S.J. [2020]. Distributed optical sensing systems and methods, US Pattent App. 16/633,706.
    [Google Scholar]
  7. Malehmir, A., Durrheim, R., Bellefleur, G., Urosevic, M., Juhlin, C., White, D. J., Milkereit, B. and Campbell, G. [2012]. Seismic methods in mineral exploration and mine planning: A general overview of past and present case histories and a look into the future: Geophysics, 77, 173–190.
    [Google Scholar]
  8. Milkereit, B., Berrer, E.K., King, A.R., Watts, A.H., Roberts, B., Adam, E., Eaton, D.W., Wu, J. and Salisbury, M.H. [2000]. Development of 3-D seismic exploration technology for deep nickel-copper deposits; a case history from the Sudbury Basin, Canada. Geophysics, 65(6), pp.1890–1899.
    [Google Scholar]
  9. Pretorius, C.C., Jamison, A.A. and Irons, C. [1989]. Seismic exploration in the Witwatersrand Basin, Republic of South Africa: Proceedings Exploration 87, Third Decennial International Conference on Geophysics and Geochemoical Exploration for Minerals and Groundwa-ter: Special Publication, Ontario Geologic Survey, 3, 241–253.
    [Google Scholar]
  10. Pretorius, C.C., Muller M.R., Larroque, M. and WilkinsC. [2003]. A review of 16 years of hard rock seismics on the Kaapvaal Craton, in Eaton, D. W., B.Milkereit, and M.H.Salisbury , eds., Hard rock seismic exploration: SEG, 247–268.
    [Google Scholar]
  11. Pretorius, C.C., Gibson, M. and Snyman, Q. [2011]. Development of high-resolution 3D vertical seismic profiles: Journal of the South African Institute of Mining and Metallurgy, 111, 117–125.
    [Google Scholar]
  12. Sidenko, E., Pevzner, R., Bona, A. and Tertyshnikov, K. [2020]. Experimental Comparison of Directivity Patterns of Straight and Helically Wound DAS Cables, in Conference Proceedings, 82nd EAGE Annual Conference & Exhibition, Jul 2020, Volume 2020, p.1–5.
    [Google Scholar]
  13. Stolz, E., Urosevic, M. and Connors, K. [2004]. Reflection seismic surveys at St. Ives gold mine, WA: Preview, 111, 79.
    [Google Scholar]
  14. Urosevic, M., Kepic, A., Stolz E. and Juhlin, K. [2007]. Seismic exploration of mineral deposits in Yilgarn Craton, Western Australia: Proceedings of Exploration 07: Fifth Decennial International Conference on Mineral Exploration, 525–534.
    [Google Scholar]
  15. Urosevic, M. and Evans., B.J. [2007]. Feasibility of seismic methods for imaging gold deposits in Western Australia, MRIWA Project, 363, Report #267.
    [Google Scholar]
  16. Urosevic, M., Kepic, A., Sheppard, S. and Johnson, D. [2008]. Nickel exploration with 3D seismic – Lake Lefroy, Kambalda, WA: Post-convention workshop on high resolution seismic methods, 77th Annual SEG conference, Las Vegas, USA, Chairman.
    [Google Scholar]
  17. Urosevic, M., Bhat, G. and Grochau M.H. [2012]. Targeting nickel sulfide deposits from 3D seismic reflection data at Kambalda, Australia: Geophysics, 77, 123–132.
    [Google Scholar]
  18. Urosevic, M., Ziramov, S., Kinkela, J. and Dwyer, J. [2016]. Seismic exploration of mineral resources – an Australian prospective: The first conference on geophysics for mineral exploration and mining, Proceedings; We Min PO5.
    [Google Scholar]
  19. Urosevic, M., Bona, A., Ziramov, S., Pevzner, R., Kepic, A., Egorov, A., Kinkela, J., Pridmore, D. and Dwyer, J. [2017]. Seismic for mineral resources – a mainstream method of the future: Exploration 07: Seventh Decennial International Conference on Mineral Exploration, Toronto, Canada.
    [Google Scholar]
  20. Urosevic, M., Bona, A., Ziramov, S., Martin, R., Dwyer, J. and Foley, A. [2019a]. Reflection seismic with DAS, why and where?: Near Surface Geoscience Conference & Exhibition, The Hague, Netherlands.
    [Google Scholar]
  21. Urosevic, M., Bona, A., Ziramov, S., Martin, R., Dwyer, J., Felding, D. and Foley, A. [2019b]. Seismic prospecting of mineral reserves with DAS, 16th SAGA Biennial Conference and Exhibition, Durban, South Africa.
    [Google Scholar]
  22. Van Zaanen, L., Bona, A., Carrea, J., Pevzner, R. and Tertyshnikov, K. [2017]. A comparison of borehole seismic receivers, SEG International Exposition and 867th Annual Meeting, in press.
    [Google Scholar]
  23. Yavuz, S., Freifield, B., Pevzner, R., Tertyshnikov, K., Dzunic, A., Shulakova, V., Robertson, M., Daley, T. M., Kepic, A. and Urosevic, M. [2016]. Subsurface Imaging Using Buried DAS and Geophone Arrays – Preliminary Results from CO2CRC Otway Project: 78th EAGE Conference & Exhibition, SBT4-04.
    [Google Scholar]
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