Gas Flow Rate Calculation
The basis for the gas flow rate calculation below is the API Manual of Petroleum Measurement Standards, Chapter 14.
The Equations Method is used for the report sheet but it and the Factors Method are both calculated below.
The compressibility calculation is based on API MPMS Chapter14.2(A.G.A. Report #8). The Gross Charachterization Method
for calculating compressibility is used for the gas flow rate calculation.
Input Parameters Reference Conditions
压差14inH2O Differential Pressure Specific Gravity Reference
下游压力32psig Downstream Pressure60Deg F (Tgr)
温度88DegF Flowing Temperature14.73Psia (Pgr)
H2S ppm Base or Contract Reference
CO2 Mole %60Deg F (Tb)
N2 Mole %14.73Psia (Pb)
气比重0.600Specific Gravity Std. Condition is 60F and 14.73 psia
管径尺寸 3.000in Meter Run Diameter14.73Atmospheric Pressure
孔板尺寸 1.500in Orifice Diameter 1.3Isentropic Exponent(cp/cv)
0.99959Compressibility of air at Std Cond.
Gas Flow Rate at Base Conditions - Factors Method0.00000925Orifice Plate Thermal Expansion Coef.(in/in-F)
15364ft^3/hr0.00000620Meter Run Thermal Expansion Coef.(in/in-F)
0.368737mmscfd0.00000690Dynamic Viscosity(lbm/ft-s)
Gas Flow Rate at Base Conditions - Equation Method
15364ft^3/hr上游压力（mpa) 3.4油嘴估计气产量
0.368737mmscfd油嘴尺寸(mm)7.00
10.441ksm3/d气产量(m3/d)24525
Other Calculated Values
47.235psia Upstream Pressure气产量气产量(m3/d)151800
17.355Mw - Gas Mole Weight估计油嘴上游压力（mpa)9.81
0.997629Zs Compressibility(std)油嘴尺寸(mm)10
0.997629Zb Compressibility (base)
0.993687Zf1 Compressibility (flowing)
1.001981Fpv
786.193688 Fn
0.601483 Fc
0.003868 Fsl
0.996446 Y1
0.974102 Ftf
1.290783 Fgr
1.000000 Ftb
1.000000 Fpb
Equation Method
Qv = 7709.61 * Cd * Ev * Y1 * d ^ 2 * ((Pf1 * Zs * hw) / (Gr * Zf1 * Tf)) ^ 0.5 * (14.73 / Pb) * ((Tbf + 459.67) / 519.67) * (Zb / Zs)
gas rate m3/d
10441。