Lake Assal is a saline lake, 155m below sea level, situated in central-western Djibouti at the top of the Great Rift Valley. The geothermal potential of the area, known for its seismic and volcanic activity, has been studied for many years and now the drilling campaign to capture this energy is under way!
The project in the Fiale Caldera area of Lake Assal consists of drilling 4 exploration wells for a new geothermal power plant, set to come on-line in 2021. The power plant will have a total capacity of 50 MW. Vallourec is supplying OCTG and VAM® Field Service to the project. The Fiale project is managed by the Project Management Unit under the authority of Electricity of Djibouti, EDD. It is financed by the World Bank, the African Bank for Development, OPIC, French Agency for Development, GEF and ESMAP.
The produced fluid from the wells is expected to be concentrated sea water that has been heated to around 305°C, although the temperatures could be as high as 360°C at the bottom of the well. The wells will be drilled directionally, reaching vertical depth of 2,500 meters. Alvaro Rodriguez, Vallourec Product Leader for Geothermal, explains: "Geothermal wells need to withstand high temperature fluctuations which induce very high compression stresses on the string. Our VAM® 21 and VAM TOP ® HC (high compression) connections are perfectly adapted to this application and have been extensively tested to ensure sealability performances". Vallourec will also provide on-site assistance through VAM® Field Service engineers to ensure the correct running of the casing and production strings with the drilling contractor.
For the government of Djibouti, geothermal energy represents a low cost, renewable and clean energy source which will generalise access to electricity for the population and promote economic development. On its side, Vallourec is committed to supporting the development of geothermal energy to make this challenge a reality.
Vallourec will supply 800 tons of OCTG from its mills in France and Germany
Grades: X56, K55, L80
Sizes: 30" 24" 18 5/8" 13 3/8" 9 5/8" 7" 4 ½"
Beveled ends, BIG OMEGA, VAM® 21, VAM TOP ® HC
VAM® Field Service
If you want to find out more about Engineered Tubular Solutions for Geothermal Wells, register here for the upcoming webcast in collaboration with World Oil on 25/04 at 9AM and 4PM Paris time!