Oil shale is an important unconventional energy resource and has enormous reserves. It is now considered as one of the most promising oil alternatives. A novel process integrated with oil shale retorting

oil shale/semi-coke combustion

shale oil and retorting gas upgrading and ash comprehensive utilization technologies

can increase energy efficiency and improve economic performance. This integrated process meets the needs of Chinese energy development strategy. It will have broad application prospects. A comprehensive overview of the key unit technologies and systemic integrated processes of the oil shale exploration and exploitation are presented. It can provide theoretical and technical foundations for the effective and environmental development of oil shale resource.