Evaluation of the Geothermal Potential for Korosi/Chepchuk Prospect, Kenya, Using GIS

Abstract

Geographical Information System (GIS) is a technology used to determine the spatial association between geo-scientific data layers with a view to mapping production zones in a geothermal area. Surface observations in Korosi/Chepchuk geothermal prospects in Kenya were used to identify suitable areas to site exploration wells. Areas characterized by high permeability (faults and structures), surface manifestations, and anomalous values in the apparent resistivity surveys were the main targets. Detailed surface exploration survey was done using various scientific methods, mainly: Geophysics (MT, TEM and Gravity), Geology (Structures, eruption centres), Geochemistry (Soil Gas sampling), and Reservoir Science (Heat Loss measurements). Data integration method within GIS was used in determining the spatial relationship between the datasets to assess the geothermal potential and prioritize areas for exploration drilling. ArcMap, geoprocessing and model building tools were used to develop the GIS Model for Priority Areas for Exploration Well (PAEW) project.