| Title | Injection Testing in 1982 at the Svartsengi High-Temperature Field in Iceland |
|---|---|
| Authors | Gudmundsson, J. S. |
| Year | 1983 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Reservoir Engineering; Iceland; Svartsengi; Reykjanes Peninsula; Pressure Drawdown; Pressure Maintenance; Injection Test; Fluid Break Through; Well Spacing; Tracer Test; Pressure Sink; Sodium Analysis; National Energy Authority; Sudurnes Regional Heating |
| Abstract | The Svartsengi reservoir is liquid dominated at 235-240°C and highly fractured. Rapid drawdown of more than 100 m has occurred so reinjection of spent fluids is being considered to maintain reservoir pressure. Cold water was injected into well 12 at Svartsengi for 24 days in 1982. Fluid chemistry was monitored in 6 production wells for about 70 days. Breakthrough indicated by lower sodium concentration (due to dilution of brine by fresh water) and /or changes in gas chemistry was observed after one hour in well 10, after 7 days in well 4, and 34 days in well 9. The average well spacing is 250 m. The test showed that well 12 is not a suitable injection well. |