Characteristics of Organic Matter Pores and the Relationship with Current Pressure System of Lower Silurian Longmaxi Shales in Dingshan Field, Southern Sichuan, China

Figure 1

(a) Tectonic distribution of Sichuan Basin (I: low gentle tectonic of North Sichuan; II: low steep tectonic of West Sichuan; III: gentle tectonic of Middle Sichuan; IV: high steep tectonic of East Sichuan; V: low steep tectonic of Southwest Sichuan; VI: low steep tectonic of South Sichuan; GF1: Weirong gas field; GF2: Weiyuan gas field; GF3: Changning gas field; GF4: Zhaotong gas field; GF5: Fuling gas field). (b) Buried depth map and sampling location of Longmaxi shales in Dingshan field. (c) The formations and sampling target (according to Lu et al. [42] and Zhu [43] modified).