vogel, outflow inflow.pdf
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2014-03-14 Classification: Internal 1
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Saturated oil
Pb>Pr>Pwf
Vogel
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Vogel
Qo/Qmax=1-0,2* Pwf/Pr0,8*(Pwf/Pr)^2
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How to use Vogel?
Meassure PR
Test points pwf vs qo
Calculate qmax
Qmax= Qo/(1-0,2 (Pwf/Pr)0,8 (Pwf/Pr)^2)
Qo= qmax (1-0,2 (Pwf/Pr)
0,8 (Pwf/Pr)^2)
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More about IPR Curves
Qg=c(Pr^2-Pwf^2)^n (Bureau of mines)
Possible to use it in undersaturated oil wells ??
It is possible but debateble.
Qo=J(Pr-Pwf)
Saturated oil wells:
Vogel: Based on simulation , teoretical.
Qmax= AOF
Qo=c(Pr^2-Pwf^2)^n must be normalized
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How to normalize
Qo=c(Pr^2-Pwf^2)^n
C and n are valid for all flowrate Qmax inclusive.
Qmax= AOF: Pwf=0 bara
Solve Qo=c(Pr^2-Pwf^2)^n for Qmax
Qomax =c(Pr^2)^n
C= Qomax/(Pr^2)^n
Replace c to main equation
Qo=Qomax/(Pr^2)^n* (Pr^2-Pwf^2)^n Qo/qomax = (1-(Pwf/Pr)^2)^n (saturated oil
wells) if mutirate test points available
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how about First Undersaturated and
then Saturated Oil Wells
If Pwf>Pb: qo=J(Pr-Pwf)
If Pwf
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Other models
Darcy Equation
q= f (pwf,Skin)
Skin value
Forsheimer
Gas condesate wells
Condensate banking
Encontrar la ecuacion de Forsheimer
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Flow equilibrium- Single branch
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Flow equilibrium (2)
Type 1 : (tengo )
P1 given P2 = f (q)
Cocurrent calculation
P2 available
Inflow (Schlumberger)
Type 2: (Quiero)
P2 given P1 = f (q)
Counter current
P1 Required
Outflow (schlumberger)
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TPR: Tubing
performance
Relationship
IPR: Inflow
performanceRelationship
VLP:
Vertical
lift
performanc
e
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Tubing performance Relationship
Presure drop: deltaPacc, deltaPfric, delta Phyd
Multiphase flow (phases, diam, friction factor, etc)
PVT
Alot of models available How to choose???
Horizontal, vertical, inclined, combined, etc.
For Wells, (MD, TVD)
Flowlines (survey)
Fluid type: monophasic, multiphase, etc.
Test point
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Q= f (Pin, Pout)
Katz et al
(dry gas flow)
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Data
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Pin (psia Qg
1200 6,14E+06
1300 7,72E+06
1500 1,04E+07
1700 1,28E+07
1800 1,40E+07
2000 1,62E+072500 2,14E+07
2760 2,40E+07
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1 Nomina de grupos hasta el lunes a las 8 am
2 Presentacion en power point3 Resumen de la parte que se esta presentando
4 Ejercicios propuesto (Amaru para el Examen)
Fechas GrupoViernes 21 marzo 17:00 1,2
Sabado 22 marzo 08:30 3,4,5
domingo 23 marzo
Examenes
Muliphase y produccion 05.04.2014
Simulacion 26.04.2014
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