Multi-source genesis of continental carbonate-rich fine-grained sedimentary rocks and hydrocarbon sweet spots

JIANG Zaixing,KONG Xiangxin,YANG Yepeng,ZHANG Jianguo,ZHANG Yuanfu,WANG Li,YUAN Xiaodong

Fig. 2. The fine-grained carbonates formed from different sources. (a) Well ST3, 3 816.86 m, the Es3L of Shulu Sag, terrigenous detrital carbonate particles; (b) Well ST3, 3 817.01 m, the Es3L of Shulu Sag, terrigenous dolomitic debris[20]; (c) Well ST1H, 4206.60 m, the Es3L of Shulu Sag, organic ribbon and biologically induced calcite[20]; (d) Well NY1, 3 333.71 m, the Es4U of Dongying Sag, calcareous nannofossils[4]; (e) Well LT1, 1 136.73 m, the C1x of Luanping Basin, microcrystalline dolomite; (f) Well LT1, 958.06 m, the C1x of Luanping Basin, tuffaceous microcrystalline dolomite.