Max injection rate through the choke
Max injection rate through the choke
(OP)
Hello colleagues!
I have some challenge calculating water injection wells.
Some wells with low Pres are absorbing and the injection rate is thus constrained by the chokes (of course cavitation and erosion is inevitable in this way but we could not decrease injection pressure).
How could I calculate Max rate of WATER through the choke (for example for the 4 mm choke and Pup=200 atm) and under what pressure ratio it will occur?
All methods I have found are for the gas and two-phase choked flow, but for the liquid?
I have some challenge calculating water injection wells.
Some wells with low Pres are absorbing and the injection rate is thus constrained by the chokes (of course cavitation and erosion is inevitable in this way but we could not decrease injection pressure).
How could I calculate Max rate of WATER through the choke (for example for the 4 mm choke and Pup=200 atm) and under what pressure ratio it will occur?
All methods I have found are for the gas and two-phase choked flow, but for the liquid?





RE: Max injection rate through the choke
Or ask the choke valve supplier if you give him the inlet and outlet pressures.
If you're getting cavitation and erosion, your answer will not be valid for very long and you then really need a different trim / valve so that it doesn't cavitate or erode
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Max injection rate through the choke
Futher, Cv is applicable only for pressure ratio lower than critical: above the critical PR the flow is constant and I wish calculate this value in Pipesim when I simulate my injection system.
RE: Max injection rate through the choke
The value of the internet is that it doesn't matter where you are - information like this is available if you look for it.
However you still need to find the data for the valve and internal trim that you have.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way