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Temperature distribution around a well during thermal injection and a graphical technique for evaluating aquifer thermal properties

Journal Article · · Water Resour. Res.; (United States)
Analytical solutions of temperature distribution are developed for the problem of thermal injection into a confined aquifer with a caprock of finite thickness. Heat transfer by horizontal conduction and convection within the aquifer and by vertical conduction in the caprock and bedrock is considered. Steady-state and 2 asymptotic unsteady-state solutions of temperature distribution around a thermal injection well are determined. One unsteady-state solution is for short time periods and the other is for long time periods. The caprock thickness is only important in the long time period solution. A graphic technique is presented using hypothetical data for evaluating 4 pertinent aquifer thermal properties. Field measurements of aquifer temperatures near the steady-state condition theoretically are needed to utilize the graphic technique. In many practical situations a long time period is required to achieve a steady state condition. Therefore, a modified graphic technique employing an unsteady temperature distribution is illustrated and can be used to estimate the horizontal thermal conductivity and aquifer thermal capacity. 43 references.
OSTI ID:
5931141
Journal Information:
Water Resour. Res.; (United States), Journal Name: Water Resour. Res.; (United States) Vol. 19:2; ISSN WRERA
Country of Publication:
United States
Language:
English