Formation conditions and exploration direction of large and medium gas reservoirs in the Junggar Basin, NW China

HU Suyun,WANG Xiaojun,CAO Zhenglin,LI Jianzhong,GONG Deyu,XU Yang

Fig. 2. Source-reservoir-caprock assemblages and accumulation profile of natural gas in the Junggar Basin (profile position in Fig. 1). C—Carboniferous; P1j—Lower Permian Jiamuhe Formation; P1f—Lower Permian Fengcheng Formation; P2x—Middle Permian Xiazijie Formation; P2w—Middle Permian Lower Wuerhe Formation; P3w—Upper Permian Upper Wuerhe Formation; T1b—Lower Triassic Baikouquan Formation; T2k—Middle Triassic Karamay Formation; T3b—Upper Triassic Baijiantan Formation; J1b—Lower Jurassic Badaowan Formation; J1s—Lower Jurassic Snagonghe Formation; J2x—Middle Jurassic Xishanyao Formation; J2t—Middle Jurassic Toutunhe Formation; J3q+k—Upper Jurassic Qigu and Kalazha Formations; K1tg—Lower Cretaceous Tugulu Group; K2d—Upper Cretaceous Donggou Formation; E1—2z—Paleogene Ziniquan Formation; E2—3a—Paleogene Anjihaihe Formation; N1s—Neogene Shawan Formation; N1t—Neogene Taxihe Formation; N2d—Neogene Dushanzi Formation; Q—Quaternary.