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. 3. Reservoir space types of parametamorphic rocks in Pingxi area. (a) Well Dp17, 4 559.4 m, Ordovician, crystalline limestone, high angle fractures, core photograph; (b) Well Dp172, 4 600.6 m, Ordovician, calc-schist, low angle fractures, intersection with high angle fractures, single polarized light, cast thin section; (c) Well Dp17, 4 461.0 m, Ordovician, calc-schist, fractures of different angles, reticular, laser confocal thin section; (d) Well Dp17, 4 559.8 m, Ordovician, calc-schist, dissolution fractures, single polarized light, cast thin section; (e) Well Dp17, 4 558.2 m, Ordovician, calc-schist, schist development, core photograph; (f) Well Dp17, 4 559.3 m, Ordovician, calc-schist; (g) Well Dp17, 4 559.7 m, Ordovician, calc-schist, dissolution pores and cavities, single polarized light, casting thin section; (h) Well Dp17, 4 355.0 m, Ordovician, crystalline limestone, local intergranular pore development, scanning electron microscopy photograph.