The liquid hydrocarbon recovered from casing head gas by adsorption, compression, or refrigeration. Casing head gas is the gas recovered at the surface from an oil well.

通过吸附作用、压缩作用或冷却作用，从套管头气回收到的液态烃，为一种汽油。套管头气是从地面上的一口油井所采到的气体。

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Analysis result of high productivity gas Wells in Luojiazhai shows temperature effect of well bore as the key factor affecting well head pressure.

罗家寨高产气井测试分析结果认为井筒的温度效应是影响井口压力的关键因素。

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Several calculation cases proved the flow rules of gas resulted from formation pressure and well-head pressure.

对几口井数据的数值模拟结果验证了地层温度与井口压力对井筒气体流动参数的影响规律。

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So what could well head freeze off mean to gas supplies?

FORBES: Cold Spell Freezes Gas Wells

Wells in shale plays have to undergo a process known as fracturing to boost the porosity of the rock and to make oil and gas flow to the well head.

FORBES: Baker Hughes Ramps Up Oil Fracking On Low Natural Gas Prices

It would be very bullish for gas prices if the deep freeze lasts for a month, and well head freeze offs shut in 125 bcf of cumulative production.

FORBES: Cold Spell Freezes Gas Wells