Characteristics of parametamorphic rock reservoirs in Pingxi area, Qaidam Basin, NW China

Zhiyuan XIA,Zhanguo LIU,Senming LI,Yongshu ZHANG,Bo WANG,Mingzhi TIAN,Jin WU,Kaizhen ZOU

Fig. 2. The rock types of parametamorphic rocks in Pingxi area. (a) Well Dp172, 4 405 m, Silurian, slate, slab structure, core photograph; (b) Well Dp172, 4 405 m, Silurian, slate, residual quartz (Q), feldspar (F), single polarized light, cast thin section; (c) Well Dp172, 4 405.0 m, Silurian, slate, feldspar and quartz in directional arrangement, scanning electron microscope photograph; (d) Well Dp172, 4 561.6 m, Ordovician, crystalline limestone, low angle fractures, core photograph; (e) Well Dp17, 4 410.0 m, Ordovician, crystalline limestone, high content of crystalline calcite (Cc), sericite (S) in directional arrangement, single polarized light, cast thin section; (f) Well Dp17, 4 355 m, Ordovician, crystalline limestone, crystalline calcite generally in directional arrangement, scanning electron microscope photograph; (g) Well Dp172, 4 602.5 m, Ordovician, biotite schist (h) Well Dp172, 4 604.0 m, Ordovician, calc-schist, calcite and sericite bedding distribution, single polarized light, cast thin section; (i) Well Dp17, 4 466.0 m, Ordovician, calc-schist, with biotite (B) and calcite, scanning electron microscope photograph.