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Volume 4, Issue 6
  • ISSN: 1569-4445
  • E-ISSN: 1873-0604

Abstract

Borehole radar tomography was used as part of a pilot study to monitor steam‐enhanced remediation of a fractured limestone contaminated with volatile organic compounds at the former Loring Air Force Base, Maine, USA. Radar tomography data were collected using 100‐MHz electric‐dipole antennae before and during steam injection to evaluate whether cross‐hole radar methods could detect changes in medium properties resulting from the steam injection. Cross‐hole levelrun profiles, in which transmitting and receiving antennae are positioned at a common depth, were made before and after the collection of each full tomography data set to check the stability of the radar instruments. Before tomographic inversion, the levelrun profiles were used to calibrate the radar tomography data to compensate for changes in traveltime and antenna power caused by instrument drift. Observed changes in cross‐hole radar traveltime and attenuation before and during steam injection were small. Slowness‐ and attenuation‐difference tomograms indicate small increases in radar slowness and attenuation at depths greater than about 22 m below the surface, consistent with increases in water temperature observed in the boreholes used for the tomography. Based on theoretical modelling results, increases in slowness and attenuation are interpreted as delineating zones where steam injection heating increased the electrical conductivity of the limestone matrix and fluid. The results of this study show the potential of cross‐hole radar tomography methods to monitor the effects of steam‐induced heating in fractured rock environments.

© European Association of Geoscientists and Engineers © 2006 European Association of Geoscientists and Engineers
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2006-03-01
2024-04-27

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References

  1. CensorY.1983. Finite series‐expansion reconstruction methods. Proceedings of the IEEE71, 409–419.
     [Google Scholar]
  2. DavisE.2003. Steam enhanced remediation. U.S. Environmental Protection Agency Demonstration Bulletin, EPA/540/MR‐03/503, accessed January 8, 2004 at http://www.epa.gov/ORD/SITE/reports/540MR03503/540MR03503.pdf
  3. Day‐LewisF.D. and LaneJ.W.Jr.2004. Assessing the resolution‐dependent utility of tomograms for geostatistics. Geophysical Research Letters31, L07503, doi:10.1029/2004GL019617.
     [Google Scholar]
  4. Day‐LewisF.D., LaneJ.W.Jr., HarrisJ.M. and GorelickS.M.2003. Time‐lapse imaging of saline tracer tests using cross‐borehole radar tomography. Water Resources Research39 (10), 1290, doi:10.1029/2002WR001722.
     [Google Scholar]
  5. DinesK.A. and LytleR.J.1979. Computerized geophysical tomography. Proceedings of the IEEE67, 1065–1073.
     [Google Scholar]
  6. GrégoireC., LaneJ.W.Jr. and JoestenP.K.2005. Steam injection pilot study in a contaminated fractured limestone (Maine, USA) – Modeling and analysis of borehole radar reflection data. Proceedings of the 3rd International Workshop on Advanced Ground Penetrating Radar, Delft, The Netherlands.
     [Google Scholar]
  7. ItamuraM.T. and UdellK.S.1995. An analysis of optimal cycling time and ultimate chlorinated hydrocarbon removal from heterogeneous media using cyclic steam injection. Proceedings of ASME Heat Transfer and Fluids Engineering Divisions, HTD_321, pp. 651–660.
     [Google Scholar]
  8. LaneJ.W.Jr., WrightD.L. and HaeniF.P.1999. Borehole radar tomography using saline tracer injections to image fluid flow in fractured rock. U.S. Geological Survey Toxic Substances Hydrology Program ‐ Proceedings of the Technical Meeting, Charleston, South Carolina. U.S. Geological Survey Water Resources Investigations Report 99‐4018C, Vol. 3, pp. 747–756.
     [Google Scholar]
  9. McMechanG.A., HarrisJ.M. and AndersonL.M.1987. Cross‐hole tomography for strongly variable media with applications to scale model data. Bulletin of the Seismological Society of America77, 1945–1960.
     [Google Scholar]
  10. NewmarkR.L. and AinesR.D.1994. Demonstration of dynamic underground stripping at the LLNL Gasoline Spill Site.Lawrence Livermore National Laboratory, Livermore, California, Final Report UCRL‐ID‐116964, v. 1‐4.
     [Google Scholar]
  11. NivaB., OlssonO. and BlümingP.1988. Radar crosshole tomography with application to migration of saline tracer through fracture zones.National Cooperative for the Disposal of Radioactive Waste (NAGRA) Technical report 88‐31, Baden, Switzerland.
     [Google Scholar]
  12. SteamTech Environmental Services, Inc
    SteamTech Environmental Services, Inc . 1999. Steam stripping and hydrous pyrolysis pilot project for the Portsmouth Gaseous Diffusion Plant, Portsmouth, Ohio.San Diego, California, Final report for DOE # DOE/OR/11‐3032&D1.
     [Google Scholar]
  13. SteamTech Environmental Services, Inc.
    SteamTech Environmental Services, Inc.2001. Pilot study of steam enhanced remediation for mitigation of residual DNAPL in fractured rock, Loring Air Force Base, Limestone, Maine.Bakersfield, California, SteamTech Environmental Services, Inc., Work Plan Preliminary Draft, 04/2001.
     [Google Scholar]
  14. StewartR.R.1992. Exploration seismic tomography – fundamentals. In: Course Notes Series3 (ed. S.N.Domenico). Society of Exploration Geophysicists, Tulsa, OK, USA.
     [Google Scholar]
  15. StrattonJ.A.1941. Electromagnetic Theory, 1st edn. McGraw–Hill Book Co.
     [Google Scholar]
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Use of borehole radar tomography to monitor steam injection in fractured limestone
Near Surface Geophysics 4, 355 (2006); https://doi.org/10.3997/1873-0604.2006009
/content/journals/10.3997/1873-0604.2006009
/content/journals/10.3997/1873-0604.2006009
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  • Article Type: Research Article

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