The Jurassic Sangonghe formation second section (J1s2) has been the main oil production layer in Block Zhong 1 of Junggar basin. The number of production wells is 9, all production wells are J1s2 reservoir. But its genetic diversity and reservoir characteristics are obviously different, resulting in different reservoir model. Many complex factors restrict the oil and gas exploration process. According to the development characteristics of sand bodies , J1s2 is divided into J1s21 and J1s22, and J1s21 is divided into J1s211 and J1s212. Comprehensive logging, coring data, the reservoir heterogeneity and its control effect on oil and water are clear. The results show that J1s2 of Block Zhong 1 mainly developed three kinds of sandwich that is mudstone, fine sandstone and calcareous sand - conglomerate, it controls oil and gas in thick sand body that develops in superimposed channel of J1s21, interlayer vertical and lateral occlusion form a independent reservoir, control the distribution of oil.