The tectonic evolution of mondial passive epicontinental basins can be divided into three major developmental phases, the pre-rifting, the rifting and the post-rifting phases. The post-rifting phase can be subdivided into thermal subsiding and drifting subphases. Both the rift sequence developed during rifting and the drift sequence developed during drifting can be the dominant strata that comprise source-reservoir-caprock (SRC) assemblages. By statistics, it is revealed that the SRC assembleges in basins can include: Ⅰ. the rifting SRC assembleges， Ⅱ. the compound rifting S and/or drifting RC assembleges, andⅢ. the drifting SRC assembleges. All types of the assembleges mainly consist of the marine/continental transitional source rocks, deepwater turbidite sandstone reservoirs and marine mudstone caprocks. Every assemblage can providea great huge amount of oil and gas reserves. The rifting SRC assembleges are in low extent of exploration and will have huge hydrocarbon potential. The compound rifting S and/or drifting RC assembleges possess of huge reserves and will have great hydrocarbon potential. The drifting SRC assembleges are in high extent of exploration and possess of huge reserves so they are the focus of deepwater oil and gas exploration and production at present.