Abstract
This paper research the deep geothermal energy in injection and production of abandoned oil wells. A mathematical and physical model of heat transfer in abandoned oil wells is established by retrofitting the abandoned oil wells. The effects of circulating water flow, abandoned well depth, outer tube diameter and thermal conductivity, central tube diameter and thermal conductivity on nominal heat transfer of heat exchanger were studied by numerical simulation. The results show that the nominal heat of the renovated abandoned well heat exchanger will increase with the increase of circulating water flow, borehole depth, outer pipe diameter and thermal conductivity of the outer pipe; it decreases with the increase of the diameter and thermal conductivity of the central pipe.
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