Five types of prototype basins in two categories of discrete and convergent can be divided according to the changes of Paleozoic structure and thermo-system. Tazhong and Tabei uplifts were developed respectively (or against the background) due to the emergence of fissured-subsidence troughs in the early Sinian; with the development of marginal sags from the late Sinian to the early Ordovician and with the subduction

closure and collision of the oceanic basins from the middle-late Ordovician to the Devonian Period. The whole Carboniferous-Permian period was under the environment of extension. Different prototype basins have different significances for oil and gas exploration. Located in the passive continental margin

Manjiaer sag has greater subsidence and sedimentary rate and has well- developed oil and gas-producing source rocks. The ancient uplift represented by Tazhong and Tabei is a main guiding area of Hercynian oil and gas accumulation and has good conditions for oil and gas reserving and capping and is a very important area for oil and gas accumulation.