Wet Gas How is it metered? Is a well's production isolated or averaged with others at the Point of sale?

Wet Gas  How is it metered?  Is each well's production isolated then measured?  

Just wondered how they measure how much Liquids came out and what those liquids contain.  Is the production and it's content just averaged for that hour, day, or  month with other wells that are connected to the line that feeds the processing plant?  When they talk about pentane propane's butane's and 23% and other wells are 60% how do they  keep it accurate to what well it came from.  I am in the meter business and I have installed gas meters that measure the gas flow as well as percent liquids but it does not measure the liquids type or btu content..

 

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Permalink Reply by Brian Powers on March 8, 2013 at 2:52am

Mark -

If you are in the meter business and install/service orifice meters, then you are probaly aware that orifice meters and the equations that calculate volume were developed for single phase flow only, e.g. dry gas or liquids with no gas content.

If you measure the liquids in the condensate tank downstream of the onsite separator and the dry gas, you can calculate a rough gas to flashed liquids ratio.

 

To get a more accurate determination of the wet gas BTU and NGL content, the wet gas stream is sampled into an evacuated stainless steel cylinder and the the gas stream is passed through a gas chromatograph that determines the NGL components (C2, C3, iC4, nC4, C5, C6, C7+, etc)

 

I hope this helps,

 

Brian

Permalink Reply by Mark on March 8, 2013 at 3:10am

thanks Brian,

GE has new ultrasonic /transit time meters that will produce a flow signal and percent liquid concentration.

Does a well's Gas consistency generally stay the same or will spot sample test be done every so often?

 

 

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