Multi Phase Flow Meter Vendors quote on their specification sheets GVF functional range. What is GVF? Let us understand it. Needless to say, before MPFMs selection the specifyingOperations Engineer should have full clarity on GVF - What it is and how it is calculated from the readily known well fluid operating data of Water Cut, GOR and flows. This spreadsheet readily helps Operating Engineer inunderstanding GVF and calculating it from the normally known well fluid operating data and the expected variations. Useful for reviewing and specifying the GVF range while ordering the MPFMs.

Temp in Rankine, Pressure, psiaBlack font is user inputRED Font data cells are Std/Calculated.

GAS VOLUME(VOID) FRACTION, GVF - CALCULATION SPREADSHEET FROM UPSTREAM WELL DATA - P, T, OIL FLOW, WATER CUT & GOR

Parameter GOR

Case/Units BBLs/DAY SCF/BBL % BWPD BLPD SCFD

1000 500 70 2333 3333 500,000 5000 600 50 5000 10000 3,000,000

20000 1000 50 20000 40000 20,000,000 0 0 - 0 0 - 0 0 - 0 0 -

0 0 - 0 0 - 0 0 - 0 0 - 0 0 -

0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 - 0 0 -

10000 1,700,000 20000 500,000

Most of the Multi Phase Flow Metering specifications require that GVF range is specified. This spreadsheet calculates GVF, from the normally known Flow, GOR & WC data. GVF is gas to total fluids percentage at actual conditions

Vop=Ps*Vs*Zop*Top/(Pop*Zs*Ts)

OOil Flow

WCWater Cut

WWater Flow

Liquid (oil+water)

Vg,std, Gas Flow at Standard

Conditions

CASE 1

CASE2

When liquid & gas flows are given use this row. GOR & WC are not needed

Gas Volume (void) Fraction (GVF.) Definition:GVF, or gas volume fraction, is defined as the ratio of the gas volumetric flow-rate to the total volumetric flow-rate.The total volumetric flow-rate is the sum of the liquid volumetric rate and the gas volumetric flow-rate. Thesevolumetric flows are usually expressed in actual (not standardized )volumetric terms. Express in either percentage (0-100%) or corresponding Fraction (0.0 to 1.0) as needed.

WC = Water Cut or PercentageGas Oil Ratio (GOR) is expressed in Standard Cubic Feet of gas per barrel of hydrocarbon liquid crude (SCF/BBL)BWPD = Barrels of Water Per DayBLPD = Barrels of Liquid (Crude+Water) Per DaySCFD = Standard Cubic Feet Per Day

CASE2

When liquid & gas flows are given use this row. GOR & WC are not needed

Multi Phase Flow Meter Vendors quote on their specification sheets GVF functional range. What is GVF? Let us understand it. Needless to say, before MPFMs selection the specifyingOperations Engineer should have full clarity on GVF - What it is and how it is calculated from the readily known well fluid operating data of Water Cut, GOR and flows. This spreadsheet readily helps Operating Engineer inunderstanding GVF and calculating it from the normally known well fluid operating data and the expected variations. Useful for reviewing and specifying the GVF range while ordering the MPFMs.

1 Case 1 = When Oil Flow, Water cut and GOR are given2 Case 2= When Standard oil, water and Gas Flows are given. GOR & WC Not necessary. Go to Row for case-2 for GVF calculation.3 Any one row is enough for a condition, table can be used to find a range of GVF by varying oil, water cut, GOR or flows.

RED Font data cells are Std/Calculated. 4 Variation in liquid volumes at Standard and actual conditions is taken as negligible5

Z values are also dependent on the compositions of N2, CO2 & H2S use other worksheet to correctly input Z values.GAS VOLUME(VOID) FRACTION, GVF - CALCULATION SPREADSHEET FROM UPSTREAM WELL DATA - P, T, OIL FLOW, WATER CUT & GOR

PSIA Rankine No. PSIA Rankine No. G, in Ft3/Day G, in BPD

14.7 520 0.9987 100 600 0.9937 84,383 15,028 14.7 520 0.9987 200 700 0.9927 295,044 52,546 14.7 520 0.9987 300 800 0.9948 1,501,805 267,463 14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!

14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!

14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!

14.7 520 1 100 600 0.9937 286,530 51,029 14.7 520 1 200 700 0.9927 49,110 8,746

Input Zop & Zs values correctly by using the other worksheet. Refer other worksheet titled "Z Calculation" in this file

Ps

Pressure StdTs

Temp StdZs

Comp Factor

Pop

Operating Pressure

Top

Operating Temp

Zop

Comp Factor

Vg,op= GGas Flow at Operating

Conditions

14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!14.7 520 #DIV/0! #DIV/0!

GVF, or gas volume fraction, is defined as the ratio of the gas volumetric flow-rate to the total volumetric flow-rate.The total volumetric flow-rate is the sum of the liquid volumetric rate and the gas volumetric flow-rate. Thesevolumetric flows are usually expressed in actual (not standardized )volumetric terms. Express in either percentage (0-100%) or corresponding Fraction (0.0 to 1.0) as needed.

Gas Oil Ratio (GOR) is expressed in Standard Cubic Feet of gas per barrel of hydrocarbon liquid crude (SCF/BBL)

Operations Engineer should have full clarity on GVF - What it is and how it is calculated from the readily known well fluid operating data of Water Cut, GOR and flows. This spreadsheet readily helps Operating Engineer in

Case 2= When Standard oil, water and Gas Flows are given. GOR & WC Not necessary. Go to Row for case-2 for GVF calculation.Any one row is enough for a condition, table can be used to find a range of GVF by varying oil, water cut, GOR or flows.Variation in liquid volumes at Standard and actual conditions is taken as negligible

Z values are also dependent on the compositions of N2, CO2 & H2S use other worksheet to correctly input Z values.GAS VOLUME(VOID) FRACTION, GVF - CALCULATION SPREADSHEET FROM UPSTREAM WELL DATA - P, T, OIL FLOW, WATER CUT & GOR

BLPD GVF in %

18,361 81.85 62,546 84.01 307,463 86.99

#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!

- #DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!

- #DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!

61,029 83.61 28,746 30.43

Refer other worksheet titled "Z Calculation" in this file

GAS+OIL+WATERTotal Liquid Flow at

Operating Conditions

GAS VOLUME(VOID)

FRACTION= 100*G/(G+O+W)

#DIV/0! #DIV/0!#DIV/0! #DIV/0!#DIV/0! #DIV/0!

Input Data: 1 0

Pressure: 14.7 psia 30 MPa 14.7

Temperature: 60 F 100 C 92

Gas specific gravity: 0.65 air = 1 0.65 air = 1 0.65

0.1 0.1 0.1

0.08 0.08 0.08

0.02 0.02 0.02

Solution:

Pseudocritical pressure = 697 psia 4.74 MPaPseudocritical temperature = 345 R 191.53 KPseudo-reduced pressure = 0.02 0.02Pseudo-reduced temperature = 1.60 1.60A = 0.4684 0.4684B = 0.0053 0.0053C = 0.0668 0.0668D = 0.9849 0.9849Gas compressibility factor z = 0.9987 0.9987

Reference: Brill-Beggs-Z.xls http://petroleumsupport.com/brill-beggs-z/

Description: This spreadsheet calculates gas compressibility factor based on Brill and Beggs correlation.

Instruction: 1) Select a unit system; 2) Update data in the Input Data section; 3) Review result in the Solution section.

Mole fraction of N2:Mole fraction of CO2:Mole fraction of H2S:

psia

F

1 for air