The tight sand gas is one of unconventional gas, it is also an important candidate resources of conventional gas.

致密砂岩气是非常规天然气的一种，是常规天然气资源最重要的后备资源之一。

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The existence of vast area of tight sand rock, low permeability of sand rock and plenteous gas supply are all favorable conditions for the formation of deep basin gas traps.

大面积致密砂岩的存在、砂岩的低渗透性以及充足的天然气供应都是形成深盆气藏的有利条件。

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Sand fracturing is the major stimulation measure in Western Sichuan tight sandstone gas reservoir.

加砂压裂是川西致密气层普遍采用的改造技术措施；

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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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Fracking, of course, is the controversial method by which producers extract tight oil and gas a process that uses a concoction of water, sand and chemicals to break those deposits free from the rocks where they rest a mile beneath the ground.

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