Distribution and gas-bearing properties of Permian igneous rocks in Sichuan Basin, SW China

MA Xinhua,LI Guohui,YING Danlin,ZHAGN Benjian,LI Ya,DAI Xin,FAN Yi,ZENG Yunxian

Fig. 9. Images of reservoir space in Upper Permian igneous rocks of Sichuan Basin. (a) Well ZG2, 3 193.09 m, epidote basalt, dissolution pore, blue cast thin section; (b) Well ZG2, 3 026 m, porphyry basalt, dissolution pore, blue cast thin section; (c) Well ZG1, 2 988 m, porphyry basalt, primary pore, orthogonal light; (d) Well ZG2, 3 026 m, porphyry basalt, dissolution pore, blue cast thin section; (e) Well YT1, 5 647.11 m, tuff, dissolution pore, blue cast thin section; (f) Well YT1, 5 646.90 m, tuff, de-vitrification micropore, blue cast thin section; (g) Well YT1, 5 647.11 m, tuff-bearing volcanic breccia, de-vitrification micropore, blue cast thin section; (h) Well YT1, 5 645.75 m, volcanic breccia, inter-gravelly pore, (-); (i) Well YT1, 5 645.76-5 645.98 m, volcanic breccia, dissolution pore; (j) Well YT1, 6 418.13- 6426.13 m, tuffaceous volcanic breccia, dissolution pore; (k) Well ZG2, 3 181.86 m, porphyry basalt, dissolution fracture, blue cast thin section; (l) Well ZG2, 3 226.26-3 226.35 m, cryptocrystalline basalt, structural fissure, X-shaped.