Accumulation Mechanism of Marine Shale Gas Reservoir in Anticlines: A Case Study of the Southern Sichuan Basin and Xiuwu Basin in the Yangtze Region

Figure 10

The production and morphological characteristics of fluid inclusions in shale of the Upper Ordovician Xinkailing Formation and the Lower Cambrian Wangyinpu Formation in the Jiangye-1 Well, Xiuwu Basin. (a) Transmissive photo of elliptical methane inclusions in the quartz minerals of secondary enlargement, Jiangye-1 Well, 1343.26 m depth, the Upper Ordovician Xinkailing Formation. (b) Transmissive photo of methane inclusions of irregular forms in the quartz minerals of secondary enlargement, Jiangye-1 Well, 1349.01 m depth, the Upper Ordovician Xinkailing Formation. (c) Transmissive photo of brine inclusions of irregular forms in the quartz minerals of secondary enlargement, Jiangye-1 Well, 1351.61 m depth, the Upper Ordovician Xinkailing Formation. (d) Transmissive photo of methane inclusions of irregular forms in the quartz minerals of secondary enlargement, Jiangye-1 Well, 2621.40 m depth, the Lower Cambrian Wangyinpu Formation. (e) Transmissive photo of brine inclusions of irregular forms in the quartz fractures, Jiangye-1 Well, 2621.40 m depth, the Lower Cambrian Wangyinpu Formation. (f) Transmissive photo of brine inclusions of irregular forms in the quartz minerals of secondary enlargement, Jiangye-1 Well, 2635.25 m depth, the Lower Cambrian Wangyinpu Formation. See Figure 1 for the well locations.

(a)

(b)

(c)

(d)

(e)

(f)