Reservoir geological modeling and significance of Cambrian Xiaoerblak Formation in Keping outcrop area, Tarim Basin, NW China

ZHENG Jianfeng,PAN Wenqing,SHEN Anjiang,YUAN Wenfang,HUANG Lili,NI Xinfeng,ZHU Yongjin

Fig. 3. Types and features of Xiaoerblak Formation rocks in Kalpin outcrop area. (a) LMD, Lower Xiaoerblak, DG-3 section, outcrop; (b) Bedded TD, framework dissolved pores along bedding, Middle Xiaoerblak-1, DG-1 section, outcrop; (c) Frame-shaped TD, well-developed vugs, Middle Xiaoerblak-2, DG section, outcrop; (d) FSD, homogeneous dissolved pores, Middle Xiaoerblak-3, DG-3 section, outcrop; (e) FSD, relatively homogeneous fenestral pores, DG-3 section, Middle Xiaoerblak-3, cast thin section, plane-polarized light; (f) OD, well-developed intragranular dissolved pores, Middle Xiaoerblak-3, XG section, outcrop; (g) SD, Middle Xiaoerblak-3, XG-1 section, hand specimen; (h) CD, well-developed intragranular/intercrystalline dissolved pores, Middle Xiaoerblak-3, XG section, cast thin section, plane-polarized light; (i) GD, Upper Xiaoerblak, DG-3, cast thin section, plane-polarized light; (j) Tepee structure, Upper Xiaoerblak, SARK section, outcrop; (k) Mud cracks, Upper Xiaoerblak, DG-3, outcrop; (l) Quartzose micritic dolostone, Upper Xiaoerblak, DG-3 section, cast thin section, orthogonal light.