A Numerical Solution to Estimate Hydro-geologic Parameters of a Fractured Geothermal Porous Medium Based on Fluorescein Thermal Decay Correction

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dc.contributor.authorAmbusso, W.
dc.contributor.authorRathore, I.
dc.contributor.authorOmenda, P.
dc.contributor.authorOkiambe, E.
dc.contributor.authorWang’ombe, B.
dc.date.accessioned2014-08-08T09:25:21Z
dc.date.available2014-08-08T09:25:21Z
dc.date.issued2014-07-31
dc.descriptionDOI: 10.1016/j.geothermics.2013.11.003en_US
dc.description.abstractA numerical solution to model the flow of fluorescein tracer in a fractured, high temperature geothermal system is presented. This study was carried out in Olkaria, Kenya. Results show that correcting for fluorescein decay at elevated temperatures can be used to yield reservoir hydro-geologic parameters and improve the methods of evaluating effects of injected fluids on reservoir temperature. The hydro-geologic parameters for this study are better than those obtained by other methods. This outcome was obtained by solving the material, tracer and energy balance equations that were fully discretized using integral finite difference and solved by Gauss–Seidel recursive methods. A computer code in C++ had to be written to perform the simulations. Porosity and permeability were seen to range between 11 and 16% and 1.8–2.6 Darcy respectively. Reservoir pore volume along well OW-12 and OW-19 flow path was approximately 17–26 million litres whilst recharge rate was 7 kg/s. This proves that computational methods such as those considered here can be used for industrial application. Furthermore, fluorescein being cheap and benign to environment can be made applicable in high temperature geothermal systems.en_US
dc.identifier.citationGeothermics Volume 51, July 2014, Pages 124–129en_US
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/10852
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectIntegral finite difference,en_US
dc.subjectOlkaria,en_US
dc.subjectTracer test studies,en_US
dc.subjectFluorescein,en_US
dc.subjectThermal decay correction,en_US
dc.subjectHydro-geologic parametersen_US
dc.titleA Numerical Solution to Estimate Hydro-geologic Parameters of a Fractured Geothermal Porous Medium Based on Fluorescein Thermal Decay Correctionen_US
dc.typeArticleen_US
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