david ebuka-project presentation
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DAVID EBUKA DAVID
(158141)
PETROLEUM ENGINEERING
1
VOGEL-TYPE IPR DEVELOPMENT FOR
HORIZONTAL WELLS IN A SOLUTION
GAS DRIVE RESERVOIR
DECEMBER 2015
OUTLINE
2
Problem Statement
Objectives
Introduction
Project Workflow
Results
Comparison with Existing IPR Correlations
Relevance of Project Work
References
3
Problem statement
Most IPR models are for vertical wells
Few correlations exist for horizontal
well IPR other than the straight line
IPR’s of Joshi, Borisov etc.
Assumptions of zero skin, reservoir
homogeneity, constant wellbore
pressure (in long wells), and absence
of non-Darcy flow.
Objectives
• To develop a Vogel-type
horizontal well IPR that accounts
for skin, reservoir heterogeneity,
non-Darcy effect and is simple to
use.
• To generate a future IPR model
INTRODUCTION
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0
500
1000
1500
2000
2500
0 200 400 600 800 1000 1200
Bo
tto
m h
ole
flo
win
g P
res
su
re, p
si
Producing rate, bopd
Reservoir Pressure
Maximum Producing
rate
PR
ES
SU
RE
FLOW RATEqb
Bubble point
I: Linear
II: Quadratic
Pb
Project WorkflowBase case model construction
(accounting for heterogeneity)Data Assembly and analysis
Skin
IncorporationResults Interpretation
(Regression analysis)
Generation of various
case models (PVT, rel-
perm etc)
Simulation of
Production and
Pressure data
Compare with
existing
correlations
and field data
RESULTS
6
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Pw
f/P
R
Qo/Qomax
IPR Model
IPR Model
y = -0.473x2 – 0.527x + 1
Accounting for Skin
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0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00
Pw
f/P
r
Qo/Qomax
FE=0.5
FE=0.6
FE=0.7
FE=0.8
FE=0.9
FE=1.0
FE=1.1
FE=1.2
Comparison With Existing Correlations
7
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Pw
f/P
r
Qo/Qomax
Comparison with other horizontal well IPR models
New IPR
Wiggins
Cheng
Retnanto &Economides
Bendakhlia and Aziz
FUTURE IPR
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0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00
Pr,
f / P
r,p
Qomax,f /Qomax,p
Future IPRCorrelation
CONCLUSION
10
The IPR can be used for three
phase flow of oil, water and gas.
The future time IPR generated in
this work is valid for 𝑃𝑅,𝑓
𝑃𝑅,𝑝values
between 0.2 – 1.
The developed correlation closely
approximates the Wiggin’s IPR
correlation
This work is based on cases of
simulated reservoir performance —
validation of the results with field data
should be performed.
The correlation applies to all stages of
depletion but can be further
investigated to generate a Bendakhlia
and Aziz type relationship that properly
accounts for depletion and variation in
bubble point pressures.
RECOMMENDATION
RELEVANCE OF PROJECT WORK
11
Fundamental to production optimization in the field.
It enables engineers do the following;
Consider various operating conditions,
Determine the optimum production scheme,
Design production equipment and artificial lift systems.
REFERENCES
12
Golan M. and Whitson C. H.: “Well Performance (Second Edition),” Norwegian
University of Science and Technology (NTNU), Prentice Hall Inc.
Retnanto A. and Economides M. J.: “Inflow Performance Relationships for
Horizontal and Multi-branched Wells in a Solution-Gas-Drive Reservoir,” Paper
(SPE 49054) presented at the 1998 SPE Annual Technical Conference and
Exhibition, New Orleans, U. S.A., 27-30 September 1998.
Vogel J. V.: “Inflow performance relationships for Solution-Gas Drive Wells,”
Journal of Petroleum Technology (January 1968), pp. 83-93.
Schlumberger Information Solutions, “ECLIPSE Black oil Reservoir Simulation –
Training and Exercise guide V2.0” SIS (2008).