Pages
Download article

Methods of suppressing free thermal convection in water-filled wells during temperature research

D.Yu. Demezhko, B.D. Khatskevich, M.G. Mindubaev

Original article

DOI https://doi.org/10.18599/grs.2020.1.55-62

55-62
rus.
eng.

open access

Under a Creative Commons license

Temperature measurements in boreholes are widely used in oil and gas geophysics, hydrogeology, geoecology, geocryology, and in the operation of hydrothermal resources. The number of applications of borehole temperature data is continuously growing. Requirement for temperature measurement accuracy is also growing. However, increasing the accuracy is limited by free thermal convection phenomenon (FTC). It occurs under a positive temperature gradient and causes temperature noise, the level of which may exceed the useful signal.

It was believed for a long time that the FTC currents are organized as a vertical sequence of convective cells having a certain vertical dimension. Existing methods of FTC suppressing by horizontal discs are based on these ideas. Theoretical and experimental studies conducted by the authors showed that these ideas are incorrect. FTC currents are organized as a rotating helical system of ascending and descending jets, not limited vertically. Under these conditions, the most efficient and technological way is dividing the borehole by vertical stripes of polymer film into separate segments. Another method of FTC suppressing uses spherical hydrogel granules. The test results of the developed devices in a real borehole are described. Using of these devices allows to reduce the temperature noise by 16-20 times (from 0.025‑0.044 K to 0.002-0.003 K).

 

geothermy, borehole temperature measurements, free thermal convection, temperature monitoring

 

  • Anderson M. P. (2005). Heat as a ground water tracer. Ground water, 43(6), pp. 951-968. https://doi.org/10.1111/j.1745-6584.2005.00052.x
  • Astrakhan I.M., Maron V.I. (1969). Non-stationary heat transfer in the well washing. Journal of Applied Mechanics and Technical Physics, 1, pp. 148-152. (In Russ.) 
  • Beck, A.E., Anglin, F.M. and Sass, J.H. (1971). Analysis of heat flow data – in situ thermal conductivity measurements. Can. J. Earth Sci., 8, pp. 1-19. https://doi.org/10.1139/e71-001
  • Berthold S., Börner F. (2008). Detection of free vertical convection and double-diffusion in groundwater monitoring wells with geophysical borehole measurements. Environmental geology, 54(7), pp. 1547-1566. https://doi.org/10.1007/s00254-007-0936-y
  • Cermak V., Bodri L., Safanda J. (2008). Precise temperature monitoring in boreholes: evidence for oscillatory convection? Part II: theory and interpretation. Int J Earth Sci, 97(2), pp. 375-384. https://doi.org/10.1007/s00531-007-0250-7
  • Cheremenskiy G.A. (1977). Applied Geothermy. Leningrad: Nedra, 224 p. (In Russ.).
  • Colombani N., Giambastiani B. M. S., Mastrocicco M. (2016). Use of shallow groundwater temperature profiles to infer climate and land use change: interpretation and measurement challenges. Hydrological Processes, 30(14), pp. 1-20. https://doi.org/10.1002/hyp.10805
  • Dakhnov V.N. (1982). Interpretation of the results of geophysical surveys of well sections. Leningrad: Nedra, 310 p. (In Russ.).
  • Demezhko, D.Yu.; Yurkov A.K.; Utkin V.I., Klimshin A.V. (2012а) On the nature of temperature variations in borehole KUN-1 (Kunashir Island). Russian Geology and Geophysics, 53(3), pp. 313-319. https://doi.org/10.1016/j.rgg.2012.02.008
  • Demezhko D.Yu., Yurkov A.K., Outkin V.I., Shchapov V.A. (2012b). Temperature changes in the KUN-1 borehole, Kunashir Island, induced by the Tohoku Earthquake (March 11, 2011, M = 9.0). Doklady Earth Sciences, 445(1), pp. 883-887. https://doi.org/10.1134/S1028334X12070124
  • Demezhko D.Yu., Mindubaev M.G., Khatskevich B.D.(2017). Thermal effects of natural convection in boreholes. Russian Geology and Geophysics, 58(10), pp. 1270-1276. https://doi.org/10.1016/j.rgg.2016.10.016
  • Demezhko D.Y., Yurkov A.K. (2017). On the Origin of Quasi-Periodic Temperature Variations in Kun-1 Well (Kunashir Island).Izvestiya, Atmospheric and Oceanic Physics, 53(8), pp. 804-812. https://doi.org/10.1134/S0001433817080023
  • Demezhko D.Yu., Khatskevich B.D., Mindubaev M.G. (2019). Natural Thermal Convection in a Vertical Water-Filled Cylinder: Infrared Thermography Investigation. Russian Geology and Geophysics, 60(7), pp. 813-818. 
  • Diment W. H., Urban Th. C. (1983). A simple method for detecting anomalous fluid motions in boreholes from continuous temperature logs. GRC Trans., 7, pp. 485-490. 
  • Dvorkin I.L., Filippov A.I., Buevich A.S., RamazanovA.Sh., Patskov L.L. (1981). A method of evaluating the nature of the formation saturation. Inventor’s certificate No. 796399 SSSR. (In Russ.)
  • Gershuni G., Zhukhovitskii E. (1976). Convective stability of incompressible fluids. Jerusalem: Keter Publishing House, 330 p.
  • GOST 25358-82. Soils. Field Temperature Method. (1982). State standart. Moscow: Izd-vo Goskomiteta SSSR podelamstroitel’stva, 14 p. (In Russ.).
  • Harries J. R., Ritchie A. I. M. (1981). The use of temperature profiles to estimate the pyritic oxidation rate in a waste rock dump from an opencut mine. Water, Air, and Soil Pollution, 15(4), pp. 405-423. https://doi.org/10.1007/BF00279423
  • Ipatov A.I., Kremenetskiy M.I., Kaeshkov I.S., Buyanov A.V. (2018). Statsionarnyy monitoring geofizicheskikh parametrov pri kontrole razrabotki mestorozhdeniy. Vozmozhnosti, problem i perspektivy ispol’zovaniya. Aktual’nye problem nefti i gaza, 2(21), pp. 1-13. (In Russ.)
  • Kazantsev S.A., Duchkov A.D. (2008). Equipment for monitoring temperature and measuring the thermophysical properties of frozen and thawed rocks. Proc. Int. Conf.: Cryogenic resources of the polar and mountainous regions. Status and prospects of permafrost engineering. Tyumen: IKZ SO RAN, pp. 236-239. (In Russ.)
  • Khatskevich B.D., Demezhko D.Yu., Mindubaev M.G. (2019). The method of temperature monitoring in waterfilled boreholes. Patent RF, no. 2678174.
  • Khatskevich B.D., Demezhko D.Yu. (2019). The method of temperature monitoring in waterfilled boreholes. Patent RF, no. 2701261.
  • Khoroshev A.S. (2012). Numerical study of free convective flows in extended vertical cylindrical areas under a constant vertical temperature gradient on the side surface. Vestnik of Samara University. Aerospace and Mechanical Engineering, 5-1(36), pp. 46-48. (In Russ.).
  • Klepikova, M. V., Roques, C., Loew, S., & Selker, J. (2018). Improved characterization of groundwater flow in heterogeneous aquifers using granular polyacrylamide (PAM) gel as temporary grout. Water Resources Research, 54(2), pp. 1410-1419. https://doi.org/10.1002/2017WR022259
  • Mindubaev M.G., Demezhko D.Yu. (2012). Free thermal convection in boreholes: numerical modeling and experimental data. Monitoring. Science and Technologies, 4(13), pp. 12-18. (In Russ.).
  • Pavlov AV. (2006). Evaluation of temperature measurements errors of grounds in shallow boreholes in permafrost. Kriosfera Zemli, 10(4), pp. 9-13. (In Russ.)
  • Pehme P., Parker B.L., Cherry J.A., Blohm D. (2014). Detailed measurement of the magnitude and orientation of thermal gradients in lined boreholes for characterizing groundwater flow in fractured rock. Journal of hydrology, 513, pp. 101-114. https://doi.org/10.1016/j.jhydrol.2014.03.015
  • Polyak B.G., Khutorskoy M.D. (2018). Heat flow from the Earth interior as indicator of deep processes. Georesursy = Georesources, 20(4), pp. 366-376. https://doi.org/10.18599/grs.2018.4.366-376
  • Sass J. H., Lachenbruch A. H., Moses T. H., & Morgan P. (1992). Heat flow from a scientific research well at Cajon Pass, California. Journal of Geophysical Research: Solid Earth, 97(B4), pp. 5017-5030. https://doi.org/10.1029/91JB01504
  • Shimamura H., Ino M., Hikawa H., Iwasaki T. (1985) Groundwater microtemperature in earthquake regions. Pure and applied geophysics, 122(6), pp. 933-946. https://doi.org/10.1007/BF00876394
  • Valiullin R.A., Sharafutdinov R.F., Fedotov V.Y., Kanafin I.V. (2016). Experimental device for studying free heat convection during induction heating of the casing. Vestnik Bashkirskogo Universiteta, 21(2), pp. 264-268. (In Russ.)
  • Van Der Merwe, J.H. (1951). The influence of convection on measured borehole temperatures. South African Journal of Science, 47(8), pp. 235-238.
  • Vélez Márquez, M., Raymond, J., Blessent, D., Philippe, M., Simon, N., Bour, O., & Lamarche, L. (2018). Distributed thermal response tests using a heating cable and fiber optic temperature sensing. Energies, 11(11), 3059. https://doi.org/10.3390/en11113059
  • Vroblesky, D.A., Casey, C.C., and Lowery, M.A. (2006). Influence of in-well convection on well sampling. U.S. Geological Survey Scientific Investigations Report 5247, 13 p.
  •  
Dmitry Yu. Demezhko
Institute of Geophysics of the Ural Branch of the Russian Academy of Sciences
100, Amundsen st., Yekaterinburg, 620016, Russian Federation
 
Bogdan D. Khatskevich
Institute of Geophysics of the Ural Branch of the Russian Academy of Sciences
100, Amundsen st., Yekaterinburg, 620016, Russian Federation
 
Mansur G. Mindubaev
Institute of Geophysics of the Ural Branch of the Russian Academy of Sciences
100, Amundsen st., Yekaterinburg, 620016, Russian Federation

 

For citation:

Demezhko D.Yu., Khatskevich B.D., Mindubaev M.G. (2020). Methods of suppressing free thermal convection in water-filled wells during temperature research. Georesursy = Georesources, 22(1), pp. 55-62. DOI: https://doi.org/10.18599/grs.2020.1.55-62