Developmental model of subtle trap in Sangonghe formation of Jurassic source rocks in the block 1 in central part of Junggar basin

Member 2 sandbodies of Sangonghe formation is a main target layer of incerased reserves and is characterized by the subtle and adjustment reservoirs with high risk.In combination with the application from sedimentology and geophysics, the sedimentary environment of J1s2 and the evolution of Che-Mo Palaeo-uplift are considered to be the main controlling factors.The research indicated that the sedimentary environment of the lower member of J1s2 belongs to braided delta front and the upper member of it belongs to meandering delta front.In the end,the developmental models of subtle trap have been provided.