This course explains the importance of hydrocarbon traps in petroleum exploration, describes the major types of hydrocarbon traps and lists the components of a hydrocarbon trap. The differences between structural and stratigraphic traps are defined, and it explains how structural traps are created. The three different kinds of fold traps are described and the twelve differences between compactional and compressional fold traps are outlined. The four development stages of growth faults are defined and the principal trap for oil and gas in growth faults is identified. It lists the nine different types of stratigraphic traps, explains the variations in lithology that form depositional traps, and describes the geologic environments in which diagenetic traps form. The course defines several geologic environments in which traps form adjacent to unconformities. Hydrodynamic traps are described, and the trapping mechanisms of combination traps are listed. It describes the ways that oil can be trapped by salt domes and identifies two situations that can generate salt movement. Trapping mechanisms in shale reservoirs are also discussed.