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Interpretation of geochemical well test data for wells OW-903B, OW-904B and OW-909 Olkaria Domes, Kenya

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Titill: Interpretation of geochemical well test data for wells OW-903B, OW-904B and OW-909 Olkaria Domes, KenyaInterpretation of geochemical well test data for wells OW-903B, OW-904B and OW-909 Olkaria Domes, Kenya
Höfundur: Jarðhitaskóli Háskóla Sameinuðu þjóðanna ; Malimo, Sylvia Joan
URI: http://hdl.handle.net/10802/23719
Útgefandi: United Nations University; Orkustofnun
Útgáfa: 2010
Ritröð: United Nations University., UNU Geothermal Training Programme, Iceland. Report ; 2009 : 17
Efnisorð: Jarðhiti; Borholur; Olkaria (Kenya); Kenía
ISSN: 1670-7427
Tungumál: Enska
Tengd vefsíðuslóð: http://www.os.is/gogn/unu-gtp-report/UNU-GTP-2009-17.pdf
Tegund: Bók
Gegnir ID: 001520747
Athugasemdir: Í : Geothermal training in Iceland 2009, bls. 319-344Myndefni: gröf, töflur.
Útdráttur: Three wells from the Domes field were allowed to discharge for 3 months in early 2009. This report describes the chemical composition of the fluids from these wells, OW-903B, OW-904B and OW-909. Downhole temperatures range from 250 to 350oC which agree with the solute and gas geothermometers. The wells produce fluids with high pH; deep fluid pH ranges from 6.9 to 8.3. OW-909 has higher values for deep fluid TDS, pH and concentrations of anions (B, Cl, F), Na and K than OW-903B and OW-904B. Olkaria Domes wells have a sodium bicarbonate water type similar to those in Olkaria West and Olkaria Central fields. Concentrations of most dissolved constituents were initially low but increased with increasing enthalpy, a considerable range is observed in concentrations. Deep fluids appear to be close to equilibrium with quartz and calcite. Very low Ca concentrations suggest that calcite scaling will not be a problem in the utilization of the Olkaria Domes geothermal fluids.


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