Prospects for use in exhausted petroleum fields of borehole heat exchangers and artesian water-bearing horizons for supplying heat and hot water

The possibility of using old suspended boreholes at spent petroleum fields for municipal heat supply purposes is considered. It is proposed that sweet water from upper artesian water-bearing horizons be forwarded along a borehole heat exchanger down to the bottom for additional heating. Results of calculations carried out in accordance with the well-known methods are given, and the influence of adjustable parameters on heat extraction efficiency is estimated.