This course will introduce the fundamental mechanisms of, and recent developments in the various techniques used for stimulating and recovering unconventional oil and gas resources. We will consider unconventional reservoirs such as tight gas reservoirs, tight oil reservoirs, shale gas reservoirs, and shale oil reservoirs. The following recovery techniques will be covered: primary recovery techniques, multistage hydraulic fracturing stimulations, gas injection methods, and chemical injection methods. There will be a special focus on CO2 injection methods, which can be used to enhance hydrocarbon recovery as well as permanently sequester CO2 in the depleted reservoirs. Examples will be provided to demonstrate how to apply these recovery techniques on a field scale