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