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The aim of the study was to assess the hydrocarbon prospectivity of the Kerio Basin in the Kenya Rift. Regional gravity and magnetic data sourced from the International Gravity Bureau (BGI) and Earth Magnetic Anomaly grid (EMAG2) respectively, were processed and analysed for major structures and geological anomalies based on variations in density magnetism and or chemistry of the rocks.Gravity Isostacy data shows low gravity anomalies of up to -100mGals that depict a deeper basement prominent to the southern part of the study area. Gravity profiles show that sediment thickness gradually increases to the south where we expect hydrocarbon accumulation. The magnetic anomaly map reveals low susceptibility rocks of between - 20nT to -200nT to the south of the basin. Magnetic tilt depth indicates sediment thickness of 2-3.5Km above the basement. The results agree with the observed gravity values of -100mGals to -200mGals in the same area. Hence the southern part of the study area shows the highest potential for hydrocarbon accumulation. Integration of these data with seismic and other geophysical methods in the southern area of the Kerio Basin can help gauge the hydrocarbon potential and reduce the uncertainty in the preliminary results.

A Preliminary Assessment of the Hydrocarbon Potential of Kerio Valley Basin: Gravity and Magnetic Interpretation