Subcritical-Flow Chokes Functions
Sachdeva and Ashford-Pierce subcritical multiphase choke models.
6 functions
PO.SF.CH.Sachdeva.Rate(P_up, P_dn, d_choke, GLR, API, SG_gas, WC, T)
Liquid flow rate using Sachdeva (1986) two-phase mechanistic model, [bbl/d]. Handles both critical and subcritical flow.
PO.SF.CH.Sachdeva.Pwh(Ql, d_choke, GLR)
Wellhead pressure using Sachdeva (1986) two-phase model, [psia]. Iterative solution for target rate.
PO.SF.CH.Sachdeva.Size(Pwh, Ql, GLR)
Choke diameter using Sachdeva (1986) two-phase model, [inches]. Iterative solution for target rate.
PO.SF.CH.AshfordPierce.Rate(P_up, P_dn, d_choke, GLR, API, SG_gas, WC, T)
Liquid flow rate using Ashford-Pierce (1975) subcritical correction model, [bbl/d]. Extends critical flow correlations to subcritical conditions.
PO.SF.CH.AshfordPierce.Pwh(Ql, d_choke, GLR)
Wellhead pressure using Ashford-Pierce (1975) model, [psia]. Iterative solution for target rate.
PO.SF.CH.AshfordPierce.Size(Pwh, Ql, GLR)
Choke diameter using Ashford-Pierce (1975) model, [inches]. Iterative solution for target rate.