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Influence of fracture-matrix interaction on thermal front movement in fractured reservoir

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Języki publikacji
EN
Abstrakty
EN
Commercial exploitation of geothermal resources requires the disposal of large volumes of cooled brine in an environmentally acceptable way. Reinjection of cooled (i.e. spent) geothermal water has become a standard reservoir management strategy. Since injected fluids are typically much colder than the reservoir rock, this strategy results in the cooling of the region around the injection wells. Injected cool water may not have sufficient residence time in the reservoir to receive enough heat from surrounding hotter rock, resulting in temperature decrease at producing wells. Usually, the energy transport in geothermal reservoirs is calculated by use of sophisticated numerical simulators. In this paper we present analytical solution of simplified model of mass and heat transfer in fractured porous medium in one dimension, assuming constant rock temperature and neglecting small-scale effect connected with dispersion and heat conduction. The solution presented in this paper is applicable if thermal capacity of rock is high but the specific area is not sufficient for instant thermal equilibrium. This approach allows for better understanding the relation between fluid movement along the fractures and heat transfer between the rock matrix and fluid. Simple numerical experiments reported in the paper have shown the importance of specific surface area of naturally fractured rock, which influences the rate of exchange of heat between the fractures and the rock matrix.
Rocznik
Strony
965--969
Opis fizyczny
Bibliogr. 11 poz., rys., wykr., tab.
Twórcy
autor
  • AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, 30 Mickiewicza Ave., 30-059 Kraków, Poland
autor
  • AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, 30 Mickiewicza Ave., 30-059 Kraków, Poland
Bibliografia
  • [1] F. Ascencio, F. Samaniegob, and J. Riverab, “A heat loss analytical model for the thermal front displacement in naturally fractured reservoirs”, Geothermics 50, 112-121 (2014).
  • [2] G. Bodvarsson, “Thermal problems in siting of reinjection wells”, Geothermics 1, 63-66 (1972).
  • [3] J. Stopa and P. Wojnarowski, “Analytical model of cold water front movement in a geothermal reservoir”, Geothermics 35, 59-69 (2006).
  • [4] M.G. Shook, “Predicting thermal breakthrough in heterogeneous media from tracer tests”, Geothermics 30, 573-589 (2001).
  • [5] N. Natarajan and G. Suresh Kumar, “Numerical modeling and spatial moment analysis, of thermal fronts in a coupled fracture-skin-matrix system”, Geotech. Geol. Eng. 29, 477-491 (2011).
  • [6] A.R. Shaik, S.S. Rahman, N.H. Tran, and T. Tran, “Numerical simulation of Fluid-Rock coupling heat transfer in naturally fractured geothermal system”, Applied Thermal Engineering 31, 1600-1606 (2011).
  • [7] Y. Hao, P. Fu, and C.R. Carrigan, “Application of a dualcontinuum model for simulation of fluid flow and heat transfer in fractured geothermal reservoirs”, Proc. Thirty-Eighth Workshop on Geothermal Reservoir Engineering 1, 11-13 (2013).
  • [8] R. Aris and N.R. Amundson, Mathematical Methods in Chemical Engineering 2, 369 (1973).
  • [9] B. Kaminski, B. Kordas, and J. Siemek, “The temperature field constitued by water flow in artesian layer”, Archives of Hydrotechnics XXIII, 217-239 (1976), (in Polish).
  • [10] A.M. Wilson, W. Sanford, F. Whitaker, and P. Smart, “Spatial patterns of diagenesis during geothermal circulation in carbonate platforms”, American J. Science 301, 727-752 (2001).
  • [11] D. Tiab and E.C. Donaldson, Petrophysics, Theory and Practice of Measuring Reservoir Rock and Fluid Transport Properties, ISBN: 978-0-12-383848-3, Elsevier Inc., London, 2011.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-5efe9280-f2b8-4c99-9bd2-19f6ca2cedb7
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