Microscopic pore-fracture configuration and gas-filled mechanism of shale reservoirs in the western Chongqing area, Sichuan Basin, China

FU Yonghong,JIANG Yuqiang,DONG Dazhong,HU Qinhong,LEI Zhi’an,PENG Hao,GU Yifan,MA Shaoguang,WANG Zimeng,YIN Xingping,WANG Zhanlei

Fig. 3. Schematic diagrams of different pore-fracture configuration types in shale reservoirs in the western Chongqing area. (a) Pore-hydrocarbon-generating pressurized fracture contact; (b) Pore-clay fracture separation; (c) Pore-mineral dissolution fracture separation; (d) Pore-compacted fracture separation; (e) Structural micro-fractures contact; (f) Organic matter edge fracture contact.