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Answers

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