Reservoir characteristics of the first member of Middle Permian Maokou Formation in Sichuan Basin and its periphery and inspirations to petroleum exploration, SW China

SU Chengpeng,LI Rong,SHI Guoshan,JIA Huofu,SONG Xiaobo

Fig. 3. Typical microscopic petrological characteristics of LMAs of the Mao 1 Member in the Sichuan Basin under microplariscope. (a) Well YY9, 1775.43 m, limestone layer of Mao 1 Member, micrite; (b) Well YY9, 1776.77 m, limestone layer of Mao 1 Member, bioclastic wackstone; (c) Well JH1, 2892.14 m, limestone layer of Mao 1 Member, bioclastic wackstone; (d) Well JH1, 2891.61 m, limestone layer of Mao 1 Member, bioclastic packstone; (e) Well JH1, 2892.34 m, marl layer of Mao 1 Member, bioclastic packstone; (f) Well YY9, 1777.75 m, limestone layer of Mao 1 Member, bioclastic grainstone; (g) Well JH1, 2891.76 m, marl layer of Mao 1 Member, argillaceous bioclastic packstone, adjacent to the limestone layer of Fig. 3d; (h) Well JH1, 2892.34 m, marl layer of Mao 1 Member, argillaceous bioclastic packstone, adjacent to the limestone layer of Fig. 3c; (i) Well JH1, 2893.26 m, marl layer of Mao 1 Member, argillaceous bioclastic packstone, adjacent to the limestone layer of the Fig. 3e.