| Title | Wen-1: First Successful Well in the Wendel-Amedee KGRA |
|---|---|
| Authors | Juncal, R. W.; Gertsch, W. D.; Johnson, K. R. |
| Year | 1982 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Exploration; Drilling; USA; California; Lassen; Flow Rate; Salinity; Hot Springs; Basalt; Temperatures; Casing; Flow Testing |
| Abstract | Field exploration activities initiated by GeoProducts Corp in 1977 culminated in the successful completion of a deep production well in Sept. 1981. The well was drilled to a depth of 5823' and completed in a fractured, dominately granodiorite lithology. A broad fault zone with associated fracturing occurs at approximately 5300'-5335' and served as the main production zone. Well testing has indicated a highly productive well with no immediate boundaries. Long term testing was conducted at a constant artesian flow rate of 670 gpm with a maximum downhole temperature during for of 251F. The thermal fluid is a Na-SO4-C1 type of low salinity. Various geothermometers suggest that the fluid originates from a reservoir in the 275-310 F range. Further study and refinement of the system model is ongoing in preparation for further deep drilling. |