dc.description.abstract |
Conceptual model of geothermal system is focused on geological and geophysical information,
temperature and pressure data and geochemical content of reservoir fluids. The conceptual model explain the
heat sources for the reservoir, the location of recharge zone as well as the main flow channels and patterns
within reservoir. Geological conceptual models are mainly based on analysis of geological data. The method
used to develop geological 3D model in this study, geological data was obtained with the permission of KenGen
management, the data is imported into datasheet in rockworks software, and in borehole manager lithology
model was chosen. Then lithology model appear on the screen, export the model to paints for editing and
modifying other features like structures, the heat source, up-flow and in-flow and finally recharge zones based
on lithology, alteration mineralogy and temperature models. The Geological 3D conceptual model shows that
trachyte formation forms the reservoir rock of Olkaria geothermal systems. The cap-rocks that overlie
reservoirs rocks are the basalts and tuffs and presence of intrusions in the well OW 924A indicates the heat
source is near to the geothermal system and finally structures acts as the recharge and the discharge zones.
Temperature models in the study area show that the wells around OW 923A and OW 39A have higher
temperatures indicators of the up flow zones. The intrusions at OW 924A indicates that the heat source is near
the systems. The Geological structures act as conduits of recharge and discharge of fluid flow in geothermal
system in the study area. |
en_US |