Tight gas Wells are generally characterized by low porosity, low permeability and high water saturation.

致密气井普遍具有低孔、低渗、高含水饱和度的特点。

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Experiments were carried out on tight gas formation core sample with a water base crosslinked gel fracturing fluid.

在室内用水基冻胶压裂液浸入致密气层岩心，进行了伤害试验研究。

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All together in 2010, Shell has added some 1.3 million acres (5, 250 square kilometers) of North America tight gas acreage.

2010年，壳牌在北美的致密气藏的面积总共增加了大约130万英亩(约合5250平方公里)。

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These are gas-tight feedthroughs.

这些是封闭的的引线。

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The Energy Information Administration (EIA) puts it at around 37tcm of recoverable reserves, two-thirds of which is shale gas and the rest tight gas and coal-bed methane.

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Hydraulic fracturing pumps many thousands of gallons of mainly water and sand, with a few chemicals, at high pressure into tight gas-bearing shale deposits (hardened muds), creating cracks that allow gas to flow back up the well to the surface ( Shale Shock).

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The original Zeppelins were based on a rigid design in which separate gas-tight compartments were surrounded by a metal frame covered with a non-airtight fabric.

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