This book is about hydrocarbon source evaluation which is generally based on the organic matter quantity (organic richness), quality (kerogen type), and the thermal maturation generation capability of the organic matter disseminated in the rock. The organic matter content were determined directly from laboratory analyses of the source rock samples from LT-1 Well in a Tertiary rift basin, northern Kenya, which had oil and gas shows. We used some seismic and gamma ray profiles, total organic carbon (TOC wt%), maturity indices (HI and PI), temperature maximum (Tmax °C), porosities and other...