Abstract:As one of the early developed area in central Junggar Basin, in recent years, the Lower Cretaceous in Dinan swell and the middle–upper Jurassic formation in Baijiahai swell-Fubei slope area have found the high-yield oil and gas reservoirs, reveals that the area of the upper-middle Jurassic and Lower Cretaceous have good source-reservoir-cap reservoirSforming conditions, rich types of trapsSand effectiveScarrierSsystem.SIn theSreservoir forming conditions, SA number of suites of Carboniferous, Pingdiquan formation of Permian andS Badaowan formation,SSangongheSformation,SXishanyao formationSofSJurassic Ssource rocks in Dongdaohaizi and FukangSdepression provide plenty ofSoil and gas to the upper-middle Jurassic and Cretaceous hydrocarbon accumulation, Toutunhe and Qigu formation of the upper-middle Jurassic,Qingshuihe and Hutubihe formation of Lower Cretaceous which are controlled by river and delta sedimentary system have a number of suites of good reservoir-seal assemblage, Sinherited and developed fault system and sand,unconformity are used to be the carrier system of oil and gas,SbasedSon the analysis ofSreservoir forming conditions, summarizesSthree Shydrocarbon Reservoir Modes in Dinan swell-Fubei slope area.