Final well report, U of R Regina 3-8-17-19 (W. 2nd Mer.) Saskatchewan geothermal feasibility project at Regina, Phase 1

The University of Regina 3-8-17-19 well is intended to be the water source well for the Geothermal Feasibility Project at Regina, a mission-oriented undertaking with aims of testing the practicality of producing low-grade geothermal waters in the western Canadian sedimentary basin and demonstrating their use for space heating at the University of Regina. Objectives of the well are to evaluate water production rates, to determine water chemistry, and to investigate subsurface temperature distribution. The well was drilled to a depth of 2215 m and is currently standing cased to 2034 m with 175 m of Winnipeg and Deadwood Formations and 6 m of Precarnbrian Basement open below the casing shoe. Cores, well cuttings, drill stem tests and logs indicate that the Winnipeg-Deadwood sandstones have good reservoir properties. The Winnipeg-Deadwood waters contain 10 to 12 percent solids, mostly sodium chloride. Rock temperatures are uncertain because measurements were made when the thermal regime was upset by drilling. Our best estimate of bottom hole temperature is 70°C and we expect a stabilized surface temperature of 65°C for water produced at 100 m3/h. The geothermal situation at Regina is regarded as encouraging for establishment of a Geothermal Demonstration Project.