Paleokarstic water tables and their control on reservoirs in Ordovician Yingshan Formation, Tazhong Area, Tarim Basin, NW China
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Paleokarstic water tables and their control on reservoirs in Ordovician Yingshan Formation, Tazhong Area, Tarim Basin, NW China |
| Haizhou QU,Maoyao LIU,Yunfeng ZHANG,Zhenyu WANG,Zhenghong ZHANG,Shiyin LI,Xingliang DENG |
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| Fig. 7. Characteristics of karst fabrics in horizontal underflow zone below third-stage water table. (a) The caverns are 0.8 m and 1.7 m in diameter; the thickness of overlay combination of near horizontal dissolved fractures and early-stage high-angle dissolved fractures is about 2.52 m; (b) The caverns are 0.9 m, 1.4 m and 0.4 m in diameter; there are dissolved vugs with relatively large diameter, or embryonic form of caverns seen in 5 312.6-5 313.0 m; (c) The cavern is 2.3 m in diameter, and partially filled by mud and breccia; there develop overlay combinations of near horizontal dissolved fractures and high-angle dissolved fractures or cystic dissolved vugs; (d) The caverns are 0.6 m, 0.6 m and 1.0 m in diameter, and partially filled by mud and breccia; there are cystic dissolved vugs developed; (e) The caverns are 0.7 m and 0.5 m in diameter; the thickness of overlay combination of near horizontal dissolved fractures and early-stage high-angle dissolved fractures is about 1.8 m; (f) The cavern is 2.0 m in diameter; the total thickness of overlay combination of near horizontal dissolved fractures with early-stage high-angle dissolved fractures and cystic dissolved vugs is 2.4 m. |
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