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Natural-state model update of Olkaria Domes geothermal field

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Titill: Natural-state model update of Olkaria Domes geothermal fieldNatural-state model update of Olkaria Domes geothermal field
Höfundur: Jarðhitaskóli Háskóla Sameinuðu þjóðanna ; Ambunya, Maureen Nechesa
URI: http://hdl.handle.net/10802/10476
Útgefandi: United Nations University; Orkustofnun
Útgáfa: 2015
Ritröð: United Nations University., UNU Geothermal Training Programme, Iceland. Report ; 2014 : 7
Efnisorð: Jarðhiti; Reiknilíkön; Kenía; Olkaria (Kenya)
ISSN: 1670-7427
Tungumál: Enska
Tengd vefsíðuslóð: http://os.is/gogn/unu-gtp-report/UNU-GTP-2014-07.pdf
Tegund: Tímaritsgrein
Gegnir ID: 001402324
Athugasemdir: Í: Geothermal training in Iceland 2014, s. 1-38Myndefni: kort, gröf, töflur
Útdráttur: The Olkaria Domes geothermal field is located at the southeast edge of the Greater Olkaria geothermal area (GOGA). The area is bound approximately by the Ol’Njorowa gorge to the west and a ring of domes to the east and south of the field. The Olkaria Domes field is a high-temperature field with most of the wells producing two-phase fluid. This report aims at discussing and updating the natural-state model of the Olkaria Domes field reservoir, incorporating data from recently drilled wells. Several 3-D natural-state numerical models of the entire GOGA geothermal system have been developed, the first in 1987 by G.S. Bödvarsson and K. Pruess. Downhole profiles of temperature and pressure in the wells were interpreted to obtain the natural state of the reservoir in the wells’ locale. Previous work was incorporated and an inclusive model developed that forms the basis of a simple numerical model for the natural state that could provide the standard, pre-exploitation natural state of the Olkaria Domes field reservoir. In this report, the main focus will be on updating the natural-state model of the Olkaria Domes field, equivalent to the undisturbed formation before exploitation of the resource began. Previous models have been developed, the latest completed in 2012 by the Mannvit/ÍSOR/Vatnaskil/Verkís consortium.


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