Effects of Heat Transfer on Tracer Response in a Geothermal Reservoir —A Theoretical Study—

This paper describes effects of heat transfer on tracer response in a naturally vertical fractured geothermal reservoir on the basis of a two-dimensional dispersion model. The theoretical results are as follow; (1) It is necessary to consider effects of heat transfer on the tracer response in a system of Peclet number larger than about unity and with thermal convective flow. (2) The time required to reach the peak of tracer and the accumulation quantity of tracer until that time under non-isothermal state are quite different from those under isothermal state. (3) A tracer response with two peaks can be seen in a reservoir where the inlet is comparatively close to the outlet.