Characteristics and main controlling factors of reservoirs in the fourth member of Sinian Dengying Formation in Yuanba and its peripheral area, northeastern Sichuan Basin, SW China

JIN Mindong,LI Bisong,ZHU Xiang,DAI Lincheng,JIANG Zhili,WU Hao,LI Hui,YANG Peiyun

Fig. 3. Main types of reservoir rocks of the fourth member of Dengying Formation in the northeastern Sichuan Basin. (a) Microbe-laminated dolomite, Profile Yangba in Nanjiang county, Layer 195; (b) stromatolite dolomite, Profile Hujiaba, Layer 129; (c) stromatolite dolomite, Profile Hujiaba, Layer 131; (d) stromatolite dolomite with dissolved pores and caves along bedding, Profile Hujiaba, Layer 132; (e) clotted dolomite, with honeycomb dissolved pores and caves, Profile Hujiaba, Layer 140; (f) clotted dolomite, Profile Hujiaba, Layer 128; (g) microbe-bond framework dolomite, with signs of the microbe filament growth on the edge of frame pores, Profile Nanjiang Yangba, Layer 235; (h) dolarenite, Profile Yangba in Nanjiang county, Layer 218; (i) microbe-bond dolarenite, Profile Hujiaba, Layer 155.