Evaluation of Favorable Shale Gas Intervals in Dawuba Formation of Ziyun Area, South Qian Depression

Figure 1

Location map of the research area (a, c, d), lithological characteristics of Dawuba Formation (b), tectonic characteristics of Ziyuan area (c), and location of samples from wells and outcrops (d). ① Xiaojiang fault; ② Shizong fault; ③ Pingxiang-Dali fault; ④ Yongfu fault; ⑤ Longsheng fault; ⑥ Tongren-Sandu fault; ⑦ Guiyang-Zhenyuan fault; ⑧ Zunyi fault; ⑨ Libo fault; ⑩ Ziyun-Luodian-Nandan-Duan fault. “Dian” means Yunnan province; “Qian” means Duizhou province; “Gui” means Guangxi province. The yellowish-brown section line crosses the wells and outcrops used in stratigraphic correlation and the green one used in comparison of total organic carbon (TOC).