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 2

Stratigraphic column and core photos of the Upper Sinian Piyuancun Formation, the Lower Cambrian Wangyinpu Formation, and Guanyintang Formation in Jiangye-1 Well. (a) The Upper Sinian Piyuancun grey siliceous dolomite, 2673 m; (b) the Lower Cambrian Wangyinpu black siliceous shale, 2628 m; (c) the Lower Cambrian Guanyintang dark-gray siliceous shale, 2607 m. See Figure 1 for the well locations.