统计结果表明，中、细粒砂岩是铀矿化最有利的岩石类型。
Statistical results show that medium and fine-grained sandstones are the most favorable rock types for uranium mineralization.
砂岩通常是良好的含水层，而细粒泥岩通常是不透水的。
Sandstones generally make good aquifers, while finer-grained mudstones are typically impermeable.
准噶尔盆地阜东斜坡区侏罗系砂岩储层为河流环境下形成的各类细粒岩屑砂岩。
The Jurassic sandstone reservoirs in Fudong Slope, Jungar Basin, are various fine_graded lithic sandstones deposited in a fluvial environment.
另外，砂质单元金含量比细粒的粉砂岩和泥岩要高，从浊积岩序列的底部旋回至上部回金的含量降低并由不稳定到稳定等规律。
At other hand, the golden content of the sandstone is higher than that of fine grain siltstone and mudstone, and tends to decrease and stabilize upward in the turbidite sequence.
延长组储集岩主要为细粒的长石砂岩、长石岩屑砂岩、岩屑长石砂岩等，还有少量的石英砂岩。
The reservoirs of the Yanchang formation almost are fine feldspathic sandstone, feldspathic debris sandstone, rock fragment feldspathic sandstone, and little quartzose sandstone.
疏松砂岩油藏开采过程中，油层压力下降和采油速度的增加以及岩石结构的破坏，是造成油层岩石微细粒运移和油井出砂的主要原因。
Reservoir pressure decline, the increase of recovery rate and the damage of rock structure are main reasons of micro fine migration and sand production during oil recovery process of such reservoirs.
结果表明，疏松砂岩油藏冷冻取心岩样的流速敏感性评价实验结果不能反映油层岩石微细粒运移的真实特征。
The result indicates that the flow velocity sensitivity of these samples can not reflect the real feature of micro fine migration.
疏松砂岩油藏开采过程中，油层压力下降和采油速度的增加以及岩石结构的破坏，是造成油层岩石微细粒运移和油井出砂的主要原因。
Reservoir pressure decline, the increase of recovery rate and the damage of rock structure are main reasons of micro fine migration and sand production during oil recovery process of s...
储层岩石类型主要为粗岩屑砂岩、中粒岩屑石英砂岩、细粒岩屑砂岩。
The sandstones of reservoir were mainly middle to coarse grain feldspar detritus sandstone, detritus feldspar sandstone and detritus sandstone.
储层岩石类型主要为粗岩屑砂岩、中粒岩屑石英砂岩、细粒岩屑砂岩。
The sandstones of reservoir were mainly middle to coarse grain feldspar detritus sandstone, detritus feldspar sandstone and detritus sandstone.
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