Chemistry in exploration of a geothermal field

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Titill: Chemistry in exploration of a geothermal fieldChemistry in exploration of a geothermal field
Höfundur: Wambugu, James Macharia ; Geothermal Development Company Ltd. ; KenGen ; Jarðhitaskóli Háskóla Sameinuðu þjóðanna ; United Nations University ; United Nations University, Geothermal Training Programme
URI: http://hdl.handle.net/10802/12866
Útgefandi: United Nations University
Útgáfa: 2016
Ritröð: United Nations University., UNU Geothermal Training Programme, Iceland. Short Course ; SC-21
Efnisorð: Jarðhiti; Jarðhitaleit; Jarðefnafræði; Efnafræði
ISSN: 1670-794x
Tungumál: Enska
Tengd vefsíðuslóð: http://os.is/gogn/unu-gtp-sc/UNU-GTP-SC-21-0606C.pdf
Tegund: Tímaritsgrein
Gegnir ID: 991008413229706886
Athugasemdir: Presented at Short Course X on Exploration for Geothermal Resources, organized by UNU-GTP, GDC and KenGen, at Lake Bogoria and Lake Naivasha, Kenya, Nov. 9-Dec. 1, 2015.
Útdráttur: Chemistry principles are some of the scientific techniques used in exploration for geothermal resources. The methods used include sampling of surface discharge from potential target areas and soil gas sampling followed by chemical analysis of the samples and finally data interpretation. The data obtained is used to assist in locating potential drill sites for geothermal generation, estimating the subsurface temperatures where the discharges are coming from and characterising the geothermal fluids using the chemistry to assess their usability for the intended purposes. This technique was used in exploration for geothermal resources in Menengai field, Kenyan Rift Valley. The results indicated availability of geothermal fluids at temperatures of up to 250 o C. The reservoir was defined by both high CO2 and Rn-222 measured in the soil gas and also high gas content in the fumarole discharges and the high volatile constituents in the fumarole steam condensates. Three deep exploration wells were proposed to be drilled in Menengai caldera using the chemistry of the surface discharges.


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