Solubility of natural gas in water?

[cmlpetro]

Hi,

I am working on tank venting estimates.

For oil I used Vasquez and Beggs correlation to calculate scf/STB vented.

I found a chart in a petroleum fluids book for water but am not sure what correlation it is. Any recommendation on a correlation to calculate gas vented from water? What about condensate?

Thanks.

 

[zdas04]

Outgasing from condensate is pretty well categorized by several Black Oil Models, use the same correlations as you use for oil.

For outgasing from natural gas dissolved in water you need to find a Henry's Law constant that covers the pressure ranges you are concerned with. Typically water can hold a pretty small amount of gas at gathering-system pressures and even less at atmospheric pressures, but to quantify it you need to input your pressures and temperatures into a real calculation.

David

 

[cmlpetro]

Vasquez Beggs is only valid up to 58 API. Can anyone recommend a correlation for condensate?