Abstract: The Pan-Hexi Corridor Basin group has developed numerous small- and medium-sized basins. Since undergoing multiple stages of transformation, the area has poor oil-gas preservation conditions, small short-axis sedimentary systems, and tight reservoirs. Early exploration mainly focuses on unconventional oil and gas, especially in Yabulai Basin. To guide the oil-gas exploration in Yabulai Basin, the geological conditions and hydrocarbon accumulation characteristics of Jurassic oil-gas reservoirs in Yabulai Basin are studied based on core, thin section, well log, logging and geochemical data. The result shows as follows. (1)The tectonic-sedimentary evolution of the basin has gone through multiple stages of basin formation and transformation. The two wings of the basin have undergone strong transformation, but the main body of the basin has good preservation conditions due to weak transformation. (2)The bidirectional delta sedimentary systems are developed in the south and north of Yabulai Basin, where the distribution of sand bodies and favorable reservoirs are controlled by the inherited paleo-landforms (sedimentary slope breaks and ancient valleys) of the slope zone. The reservoir is superimposed vertically with the source rocks at the maximum lake flood surface, thus forming a self-generating and self-storing lithological reservoir. Guided by the new oil-gas accumulation model, the drilling rigs deployed in Yabulai Basin encountered good reservoirs and obtained industrial oil flow during oil testing, thus improving the inefficient exploration in the past. In addition, the potential areas such as stratigraphic and buried hill oil-gas reservoirs are developed in the deep strata of the basin, and multi-layered three-dimensional exploration is expected to achieve sustainable breakthroughs. The research results will strongly promote the exploration and discovery of Yabulai Basin, and also open up a new era of conventional and unconventional oil-gas exploration in small- and medium-sized basins of the Pan Hexi Corridor Basin group.