| Title | Iceland Deep Drilling Project: Testing of Reykjanes Brine and Steam in High Pressure Vessel. Experimental Plan and Vessel Specification |
|---|---|
| Authors | Trausti HAUKSSON, Kristín Vala MATTHÍASDÓTTIR, Guðmundur Ómar FRIÐLEIFSSON |
| Year | 2015 |
| Conference | World Geothermal Congress |
| Keywords | Reykjanes, hot deep brine system, hp-vessel, at site experiments. |
| Abstract | Drilling of a 5 km well in the geothermal field in Reykjanes, Iceland is under preparation. The brine at this depth is believed to be of seawater salinity as in the system above. By testing the steam and brine tapped directly from the Reykjanes wells in a high-pressure vessel heated to expected deep reservoir temperature, information will be gained about chemical properties of the fluids in the deep system and also about corrosiveness of the fluids. The vessel will be charged with brine and steam from the Reykjanes power plant in predetermined ratios and also with solids representing the rock composition in the deep system. Then the vessel will be heated to reach experimental conditions of 400 to 500 °C at a pressure of 300 bar. The phases will be liquid brine, dry superheated steam or a mixture of brine and steam, depending on vessel temperature. Samples will be collected of liquid and vapour phase for analysis. By controlling the pressure and temperature in the vessel, the chemical equilibrium between gas, steam, brine and rock can be studied as well as the solution and dissolution of minerals in discharging well. The high experimental pressure and temperature will possess great demands on the vessel design. Special sampling procedures must be adopted in order to get representative samples of both steam and brine. The design and building of the experimental equipment is described as well the experimental procedures. |