3 replies to this topic

[motaleby]

Dear Engineers

 

I'm working on simulating of process surface facilities for an undeveloped gas field. I want to know at what

 

condition of P & T the dry gas should be saturated with water (reservoir, first separator or storage tank)?

 

Best Regards

[serra]

that should be a value from design,

I mean that for a rigorous simulation you should start as close as possible from well including water in composition,

then to calculate compositions (including water) you solve phase equilibria at different conditions in the plant,

accuracy of simulation depending from accuracy of models (make sure to select a suitable thermo package).

[motaleby]

thank you serra

If the pressure increases, the amount of water in the gas will decrease, so I think the worst case is saturation with water at standard condition (storage tank).

[serra]

normally you see water in liquid (and vapor) phases in different sections of the plant,

you can estimate the amount solving phase equilibria,
at constant temperature for a stream of hydrocarbons + water if you increase pressure,

within certain limits the amount of water contained in the vapor phase increases (due to higher density of vapor phase),

note that in most cases with hydrocarbons water forms a separate liquid phase,

for accurate results you need to model accurately the fugacity of water,

as said make sure to select a suitable thermo package.