努比亚砂岩
- 网络Nubian Sandstone
努比亚砂岩-
苏丹输油管道在喀土穆北45km处穿越尼罗河，穿越处河床分布的主要地层为中砂、卵石及努比亚砂岩。
Sudan oil pipeline will pass through Nile 45 km away north of Al Khartoum . The mainly distributed strata at river bed includes medium sand , peddle and Nubia sandstone .
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根据穿越处地貌及地层特性决定将努比亚砂岩作为定向钻穿越的围岩。
Based on the features of geomorphology and strata in the crossing area , the Nubia sandstone is selected to be the surrounding rock .
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在可钻性、成孔性及粗颗粒可携带性等方面对努比亚砂岩进行了分析，认为将其作为穿越地层是可行的。
This paper analyzes the drillability , hole-making and carry of coarse grain concerning the Nubia sandstone , and concludes that it is suitable to be the crossing strata .