不是只有页岩气是一种新的储备能源：在砂岩中的“致密地层天然气”还有在煤层里的甲烷(一种能在矿井里杀死金丝鸟的气体)也十分有前景。
Nor is shale gas the only new sort of reserve: "tight gas" in sandstones and coal-bed methane (the sort of gas that used to kill canaries down mines) are also promising.
本文用模型实验研究了声波在致密碳酸盐岩地层井中的传播特性。
The propagation characteristic of acoustic wave in borehole that penetrates compact carbonate formation is analysed by doing model experiment.
加入交联剂的PVA17- 88降失水剂的降滤失机理是：在过滤介质与滤饼之间形成一层致密的薄膜，阻止了水泥浆中的水向地层流失。
The filtration mechanism of PVA17-88 crosslinked is that the formation of a fine film between filtrate medium and cake can prevent loss of water in slurry into formation.
主要产层为低渗透超致密砂岩，其渗透率和孔喉结构对上覆地层净压力很敏感。
The major pay bed is low permeable ultra dense sandstone. Its permeability and pore throat texture are very sensitive to the net pressure of overlying strata.
特别是其有效降低致密砂岩地层破裂压力的特点，为川西地区高破裂压力气藏的开发提供了新的思路。
Especially the advantage of lowering the fracture pressure of tight sands provides a new way to develop the high fracture pressure gas reservoirs in West Sichuan.
川西须家河组2段气藏属于低渗低孔致密深层气藏，地层压力和破裂压力高。
Gas reservoir in Xujiahe Section 2 in west Sichuan are low porosity, low permeability, deep, high formation pore and fracture pressure, etc.
川西坳陷上三叠统至侏罗系地层主要表现为岩石致密、研磨性强，钻井速度慢，建井周期长。
From upper Triassic to Jurassic of west Sichuan Depression, the rock is dense, the grinding is strong, the speed of well drilling is slow and the cycle of building well is long.
在川西地区碎屑岩地层中，砂岩与泥岩、致密砂岩与疏松砂岩可以通过肉眼岩屑鉴定或钻时变化进行识别。
In the clastic reservoirs of west Sichuan Basin, sandstone and mudstone, tight sandstone and loose sandstone can be recognized by megascopic cuttings determination and drill time changes.
在川西地区碎屑岩地层中，砂岩与泥岩、致密砂岩与疏松砂岩可以通过肉眼岩屑鉴定或钻时变化进行识别。
In the clastic reservoirs of west Sichuan Basin, sandstone and mudstone, tight sandstone and loose sandstone can be recognized by megascopic cuttings determination and drill time changes.
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