Surface Facilities LAMBDAs
Choke performance and gas and liquid pipeline hydraulics.
43 lambdas
PO.SF.CH.Gas.Rate.SI(P_up, P_dn, d_choke, SG_gas, T, Cd, k)
Gas flow rate through choke, [sm3/d]. Automatically determines sonic or subsonic flow regime (SI units).
PO.SF.CH.Gas.Rate.Sonic.SI(P_up, d_choke, SG_gas, T, Cd, k)
Gas flow rate at sonic (critical) conditions, [sm3/d]. Rate independent of downstream pressure (SI units).
PO.SF.CH.Gas.Pwh.SI(Qg, d_choke, SG_gas, T, Cd, k)
Required upstream pressure for sonic gas flow, [kPa] (SI units).
PO.SF.CH.Gas.Size.SI(Qg, P_up, SG_gas, T, Cd, k)
Required choke diameter for sonic gas flow, [cm] (SI units).
PO.SF.CH.Liq.Rate.SI(d_choke, dP, Rho_l, Cd)
Liquid flow rate through choke, [m3/d]. Uses Bernoulli equation for incompressible flow (SI units).
PO.SF.CH.Liq.dP.SI(d_choke, Ql, Rho_l, Cd)
Pressure drop across choke for liquid flow, [kPa] (SI units).
PO.SF.CH.Liq.Size.SI(Ql, dP, Rho_l, Cd)
Required choke diameter for liquid flow, [cm] (SI units).
PO.SF.CH.Pilehvari.Rate.SI(Pwh, d_choke, GLR)
Liquid flow rate using Pilehvari (1980) critical flow correlation, [m3/d]. Based on U. of Tulsa experimental data (SI units).
PO.SF.CH.Pilehvari.Pwh.SI(Ql, d_choke, GLR)
Wellhead pressure using Pilehvari (1980) critical flow correlation, [kPa] (SI units).
PO.SF.CH.Pilehvari.Size.SI(Pwh, Ql, GLR)
Choke diameter using Pilehvari (1980) critical flow correlation, [cm] (SI units).
PO.SF.CH.Achong.Rate.SI(Pwh, d_choke, GLR)
Liquid flow rate using Achong (1961) critical flow correlation, [m3/d]. Modified Gilbert for Lake Maracaibo conditions (SI units).
PO.SF.CH.Achong.Pwh.SI(Ql, d_choke, GLR)
Wellhead pressure using Achong (1961) critical flow correlation, [kPa] (SI units).
PO.SF.CH.Achong.Size.SI(Pwh, Ql, GLR)
Choke diameter using Achong (1961) critical flow correlation, [cm] (SI units).
PO.SF.CH.Ros.Rate.SI(Pwh, d_choke, GLR)
Liquid flow rate using Ros (1960) critical flow correlation, [m3/d] (SI units).
PO.SF.CH.Ros.Pwh.SI(Ql, d_choke, GLR)
Wellhead pressure using Ros (1960) critical flow correlation, [kPa] (SI units).
PO.SF.CH.Ros.Size.SI(Pwh, Ql, GLR)
Choke diameter using Ros (1960) critical flow correlation, [cm] (SI units).
PO.SF.CH.Baxendell.Rate.SI(Pwh, d_choke, GLR)
Liquid flow rate using Baxendell (1957) critical flow correlation, [m3/d]. Developed from Lake Maracaibo field data (SI units).
PO.SF.CH.Baxendell.Pwh.SI(Ql, d_choke, GLR)
Wellhead pressure using Baxendell (1957) critical flow correlation, [kPa] (SI units).
PO.SF.CH.Baxendell.Size.SI(Pwh, Ql, GLR)
Choke diameter using Baxendell (1957) critical flow correlation, [cm] (SI units).
PO.SF.CH.Gilbert.Rate.SI(Pwh, d_choke, GLR)
Liquid flow rate using Gilbert (1954) critical flow correlation, [m3/d]. Widely used for oil wells with gas (SI units).
PO.SF.CH.Gilbert.Pwh.SI(Ql, d_choke, GLR)
Wellhead pressure using Gilbert (1954) critical flow correlation, [kPa]. Calculates required pressure for target rate (SI units).
PO.SF.CH.Gilbert.Size.SI(Pwh, Ql, GLR)
Choke diameter using Gilbert (1954) critical flow correlation, [cm]. Calculates required choke size for target rate (SI units).
PO.SF.CH.Sachdeva.Rate.SI(P_up, P_dn, d_choke, GLR, API, SG_gas, WC, T)
Liquid flow rate using Sachdeva (1986) two-phase mechanistic model, [m3/d]. Handles both critical and subcritical flow (SI units).
PO.SF.CH.Sachdeva.Pwh.SI(Ql, d_choke, GLR)
Wellhead pressure using Sachdeva (1986) two-phase model, [kPa]. Iterative solution for target rate (SI units).
PO.SF.CH.Sachdeva.Size.SI(Pwh, Ql, GLR)
Choke diameter using Sachdeva (1986) two-phase model, [cm]. Iterative solution for target rate (SI units).
PO.SF.CH.AshfordPierce.Rate.SI(P_up, P_dn, d_choke, GLR, API, SG_gas, WC, T)
Liquid flow rate using Ashford-Pierce (1975) subcritical correction model, [m3/d]. Extends critical flow correlations to subcritical conditions (SI units).
PO.SF.CH.AshfordPierce.Pwh.SI(Ql, d_choke, GLR)
Wellhead pressure using Ashford-Pierce (1975) model, [kPa]. Iterative solution for target rate (SI units).
PO.SF.CH.AshfordPierce.Size.SI(Pwh, Ql, GLR)
Choke diameter using Ashford-Pierce (1975) model, [cm]. Iterative solution for target rate (SI units).
PO.SF.PL.Gas.Weymouth.Rate.SI(P_in, P_out, pipe_ID, pipe_length, SG_gas, T, Z, E)
Gas flow rate using Weymouth equation for high-pressure large-diameter pipelines, [sm3/d] (SI units).
PO.SF.PL.Gas.PanhandleA.Rate.SI(P_in, P_out, pipe_ID, pipe_length, SG_gas, T, Z, E)
Gas flow rate using Panhandle A equation for medium-pressure transmission, [sm3/d] (SI units).
PO.SF.PL.Gas.PanhandleB.Rate.SI(P_in, P_out, pipe_ID, pipe_length, SG_gas, T, Z, E)
Gas flow rate using Panhandle B equation for high-pressure large-diameter transmission, [sm3/d] (SI units).
PO.SF.PL.Gas.Weymouth.Pout.SI(Qg, P_in, pipe_ID, pipe_length, SG_gas, T, Z, E)
Outlet pressure for gas pipeline using Weymouth equation, [kPa] (SI units).
PO.SF.PL.Gas.PanhandleA.Pout.SI(Qg, P_in, pipe_ID, pipe_length, SG_gas, T, Z, E)
Outlet pressure for gas pipeline using Panhandle A equation, [kPa] (SI units).
PO.SF.PL.Gas.PanhandleB.Pout.SI(Qg, P_in, pipe_ID, pipe_length, SG_gas, T, Z, E)
Outlet pressure for gas pipeline using Panhandle B equation, [kPa] (SI units).
PO.SF.PL.Gas.Vel.SI(Qg, pipe_ID, P, T, Z)
Gas velocity at pipeline conditions, [m/s] (SI units).
PO.SF.PL.Gas.Rho.SI(P, T, SG_gas, Z)
Gas density at pipeline conditions, [kg/m3] (SI units).
PO.SF.PL.Gas.Re.SI(Qg, pipe_ID, SG_gas, Ug)
Reynolds number for gas pipeline flow (SI units).
PO.SF.PL.Liq.dP.SI(Ql, Rho_l, Ul, pipe_ID, pipe_length, pipe_roughness)
Pressure drop for liquid pipeline using Darcy-Weisbach equation, [kPa] (SI units).
PO.SF.PL.Liq.Rate.SI(dP, Rho_l, Ul, pipe_ID, pipe_length, pipe_roughness)
Liquid flow rate for given pressure drop using Darcy-Weisbach, [m3/d] (SI units).
PO.SF.PL.Liq.Pout.SI(P_in, Ql, Rho_l, Ul, pipe_ID, pipe_length, pipe_roughness, dH)
Outlet pressure for liquid pipeline, [kPa] (SI units).
PO.SF.PL.Liq.Pin.SI(P_out, Ql, Rho_l, Ul, pipe_ID, pipe_length, pipe_roughness, dH)
Required inlet pressure for liquid pipeline, [kPa] (SI units).
PO.SF.PL.Liq.Vel.SI(Ql, pipe_ID)
Liquid velocity in pipeline, [m/s] (SI units).
PO.SF.PL.Liq.Re.SI(Ql, pipe_ID, Rho_l, Ul)
Reynolds number for liquid pipeline flow (SI units).