Aluto-Langano Geothermal Field, Ethiopian Rift Valley- Physical Characteristics And The Effects Of Gas On Well Performance

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Journal Article: Aluto-Langano Geothermal Field, Ethiopian Rift Valley- Physical Characteristics And The Effects Of Gas On Well Performance

Abstract
This study, which focuses on the Aluto-Langano geothermal field, is part of the ongoing investigations of the geothermal systems in the Ethiopian Rift Valley. Aluto-Langano is a water-dominated gas-rich geothermal field, with a maximum temperature close to 360°C, in the Lakes District region of the Ethiopian Rift Valley. The upflow zone for the system lies along a deep, young NNE trending fault and is characterized by boiling. As a result, the deep upflow zone loses some water as steam and produces a cooler saline shallow aquifer. The high partial pressure of carbon dioxide (about 30 bar in the reservoir) depresses the water table and restricts boiling to deeper levels. The main aquifer for the system is in the Tertiary ignimbrite, which lies below 1400 m. The capacity of the existing wells is close to 7 MWc; the energy potential of the area is estimated to be between 3000 and 6000 MWt yr km-3, or 10-20 MWc km-3 for over 30 years.

Author 
B. Gizaw








Published Journal 
Geothermics, 1993





DOI 
Not Provided
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Citation

B. Gizaw. 1993. Aluto-Langano Geothermal Field, Ethiopian Rift Valley- Physical Characteristics And The Effects Of Gas On Well Performance. Geothermics. (!) .