There are a number of petroleum-producing Mesozoic-Cenozoic basins in the coastal areas of eastern China. Voluminous volcanic and sub-volcanic intrusive rocks, dominantly basaltic and trachytic in composition, are intercalated in sedimentary sequences. These igneous rocks serve as caprocks as well as reservoir beds. Oil and gas reservoirs related to volcanic rocks can be classified into the volcanite-trapping type, volcanite-sealing type and weathered crust type, and those related to sub-volcanic intrusions include the doming-derived fracture type, crypto-explosive breccia type, primary fracture type, alteration-fractured zone type, lateral sealing type, contact metamorphic zone type and lateral sealing type. A generalized model for the formation of hydrocarbon reservoirs related to igneous rocks is proposed. More attention should be paid to igneous-related reservoirs during exploration for hydrocarbons in these basins in the future.