A Cause Analysis of the High-Content Nitrogen and Low-Content Hydrocarbon in Shale Gas: A Case Study of the Early Cambrian in Xiuwu Basin, Yangtze Region

Figure 12

FIB-HIM photos of organic-rich shale: (a) the lower Silurian Longmaxi shale in Jiaoye-1, Jiaoshiba Play (depth: 2402 m, TOC: 4.44%, : 2.58%) (from Wang et al. [13]) and (b) the lower Silurian Wangyinpu shale in Jiangye-1, Xiuwu Basin (depth: 2402 m, TOC: 11.27%, : 3.8%). See Figure 1 for the well locations.

(a)

(b)