Geothermal Exploration of Olkaria and Menengai fields
Transcript of Geothermal Exploration of Olkaria and Menengai fields
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Sustainable Development Goals Short Course IV on Exploration and Development of Geothermal Resources
Victor Otieno
Geologist
Kenya Electricity Generating Company PLC
Geothermal Exploration of Olkaria and Menengai fields
24th November, 2019
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
Outline
• General Introduction.
• Olkaria geothermal field.
• Menengai geothermal field.
• Conclusion
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
General introduction
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
General introduction cont’d
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
Olkaria Geothermal Field
• Field size- 240 Km2.
• Geothermal License Area-204 Km2.
• Located within Olkaria Volcanic Complex.
• Geothermal potential- 1200 MWe.
• Exploration for geothermal resources- 1952
• Divided into 7 sectors/sub-fields.
• Aggregate installed capacity-865 MWe.
• KenGen PLC & OrPower 4 Inc.
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
Olkaria Geothermal Field cont’d
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
Exploration history
• In 1952-Studies carried out by a consortium of companies-EAPL., PSC., AEIE., Babock & Wilcox Ltd.
• In 1956- X1 and X2 were drilled (950 m and 1200 m).
• 1966- a resistivity survey done.
• 1971- UNDP/GoK- geothermal exploration (Olkaria- Lake Bogoria).
• Geological mapping, hydrogeological surveys, gravity studies & infra-red imagery surveys.
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
Exploration history cont’d
• Recommended deep drilling of 4 deep wells- 2200 m.
• In 1973- OW-01 drilled- 102 0C at 1 km depth.
• In 1974- OW-02 drilled and struck steam- 1350 m.
• By 1976- 6 exploratory wells had been drilled.
• Feasibility study by SWESCO and VRKIR consulting group.
• Recommended development of 2x15 MWe power plant.
• After the feasibility study- UNDP pulled out of the project.
• Active drilling for a 30 MWe power plant continued- GENZL.
• Additional wells drift thereafter.
• In1981- 15 MWe of Olkaria 1.
• > 300 wells drilled to present.
• Continuous exploration & development- current status of the field.
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
Olkaria Geothermal Field- Geology
• Surface geology- pyroclasts, pumice, comendites.
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
OGF- Structural setting
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
OGF- Lithological cross-sections
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
OGF Stratigraphic model
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
OGF Conceptual model
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
Menengai Geothermal Field
• Exploration by KenGen- 2004.
• Detailed surface studies by GDC- 2011.
• Developed by GDC.
• > 54 wells have been drilled.
• Has realised a potential of about 170 MWe.
• 105 MWe to be developed by IPPs.
Orpower 22 Ltd.
QEAPL.
Sosian Menengai geothermal power Ltd.
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
Menengai Geothermal Field
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
Menengai Wells
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
MGF- Components
Menengai Caldera.
Ol’rongai TVA.
Solai graben.
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
MGF- Volcanic phases
•Pre-caldera.
•Syn-caldera.
•Post-caldera.
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
MGF- Geology
• Pyroclastics.
• Ignimbrites.
• Trachytes.
• Basalts.
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
MGF- Structural setting
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
MGF- Lithological cross-sections
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
MGF stratigraphic model
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
MGF Conceptual Model
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
Conclusion
• Capacity building key.
• Improvement in technology- current to status of the fields.
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
THANK YOU
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SDG Short Course IV on Exploration and Development of Geothermal ResourcesOrganized by UNU-GTP and KenGen | Lake Bogoria and Lake Naivasha | Nov 14-4 Dec, 2019
INFORMATION
Name of course: SDG Short Course IV on Exploration and Development of Geothermal Resources
Location: Lake Bogoria and Lake Naivasha, Kenya
Timing: November 14-December 4, 2019
Organized by: United Nations University Geothermal Training Programme (UNU-GTP) and Kenya Electricity Generating Company PLC (KenGen)
Financed by: UNU-GTP and KenGen
Presentation author(s): Victor Otieno ([email protected])
Kenya Electricity Generating Company Company PLC
P.O Box 785-20117, Naivasha
www.kengen.co.ke