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Permalink Reply by Les Bamburg on June 8, 2009 at 4:05

Ruby, the "on-off" safety valves are primarily intended to shut-in production in the event of a malfunction or other issue and are normally triggered automatically by the local safety system. I do not believe these include rate control capability.

Large centralized facilities such as natural gas processing plants will have adjustable rate delivery capability but these are manned 24-hours per day.

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Permalink Reply by Grillin' - MmmMmm on June 8, 2009 at 2:03

The problem with mechanically adjustable valves for choking is that choking gas wells causes wear and tear on the metal being used to choke. If you try it with a valve, you will soon find that the valve won't close when it is needed to be closed. Hence the use of chokes that can be easily replaced when they start to wear. I've seen some pretty nasty erosion on chokes for high rate wells, although most of that wear came from sand being produced with the high rate gas. Small amounts of sand in a high rate gas well can cause some serious damage! But that isn't a big issue in the HS, at least I haven't heard of it!

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Permalink Reply by red rider on June 6, 2009 at 18:37

for the sake of arguement, keeping the numbers simple. if a well produces 1 mmcfd, does that mean it might give 30 mmcfd per month? (average 30 day month) or does that mean the well produced 1 mmcfd (on average) for that month? in which case the well produced 30 mmcf for that month.

sorry for the ignorance, i am just trying to figure this stuff out! and i know i am in the right place for answers.

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Permalink Reply by Les Bamburg on June 6, 2009 at 19:22

Robert, if a well's production flow rate is 1 MMscfd (MMscf/Day) then it just means the well is producing one million standard cubic feet of gas in one day (24 hours). If that well maintains that same rate for a 30 day month then the total gas produced in that month would be 30 million standard cubic feet (MMscf).

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Permalink Reply by red rider on June 7, 2009 at 18:19

thats what i was thinking! thanks

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Permalink Reply by red rider on June 13, 2009 at 18:03

OK, just another quick question. If the operator produces 30MMscf for the month, or more as if on a horizontal that cranks out 20MMscf per day, assuming it produced that amount for 30 days, that would be 6 trillion in a months time, does the operator sell it all? or in parcels? besides, who has the storage capacity for 6 trillion anyway, i presume it would be sold. But then, those kind of wells don't really put out that much everyday do they? thats probably the peak day for that month.

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Permalink Reply by Spring Branch,mineral owner on June 13, 2009 at 18:32

Robert, what the heck are you talking about?? 20 times 30 is 600, as in 600 million cu ft in your example. That is a long ways from 6 trillion, which is 6 thousand billion.

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Permalink Reply by red rider on June 13, 2009 at 19:15

oops, sorry bad math. you are right. 600 million. good catch. sorry about that.

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Permalink Reply by Les Bamburg on June 14, 2009 at 3:51

Robert, normally a producer sells gas at the rate of production and the price is the same for one calendar month. Marketers, producers or purchasers do have the ability to place some natural gas production in underground storage for withdrawal and sale at a later time. Most producers do not have access to storage capacity so it would be marketers or purchasers (LDC, power plant, etc) that would make this decision.

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