The document discusses optimization of production from horizontal wells using nodal analysis and the PROSPER software. It outlines factors that affect pressure losses in horizontal and inclined well sections and describes how nodal analysis can be used to model well deliverability and optimize parameters like well length. Results from PROSPER simulations show how inlet pressure, pressure drop, and flowrate increase with longer well lengths up to an optimal value. The document concludes horizontal wells can be optimized for production using nodal analysis and PROSPER to evaluate factors affecting pressure losses and choose well parameters.

2. • Aim
• What is Optimization?
• What is Production Optimization?
• Production Optimization Using Nodal Analysis
• Improved Nodal Analysis for Horizontal Well
• Factors Affects Pressure Losses in Horizontal Section
• Factors Affects Pressure Losses in Inclination Section
• What is PROSPER?
• Applications of PROSPER
• Results
• Unimaginable Point!
• Conclusion
• References 2

3. The aim of this project is to optimize the production in horizontal
wells, there are several methods to optimize production in
horizontal wells. One of the most effective way to achieve the
gaol is increasing horizontal well section.
3

4. Optimization is an act, process,
or methodology of making as
fully perfect, functional, or
effective as possible, specifically
the mathematical procedures
involved in this.
4

5. • The term ‘‘production optimization’’
has been used to describe different
processes in the oil and gas industry.
• Production Optimization means
Balance between Production rate /
Deliverability and demand.
• Production Optimization includes a
good understanding about Production
Systems and Reservoir Fluid.
5

6. • Well deliverability is determined by
the combination of well inflow
performance and wellbore flow
performance.
• This work focuses on prediction of
achievable fluid production rates
from reservoirs with specified
production string characteristics.
• The technique of analysis is called
“Nodal Analysis”
6
Gilbert (1956) (10)

7. 7production optimization using Nodal Analysis (2)

8. After improve nodal
analysis for horizontal
well, two important
section will be increased
that are following:
• Horizontal Section
• Inclination Section
8

9. 1. The characteristics and physical
properties of the fluid.
2. Friction in pipes.
3. Energy losses in fitting.
4. Pressure drop through equipment.
5. The distance or length the fluid must
travel.
6. Diameter change of the pipe.
9

10. Factors affects pressure losses in horizontal
section same as bent section, only one factor
will be added which is Pressure Losses
whenever the flow direction changes.
The pressure loss in a bend can thus
be calculated as:
10

11. • PROSPER is a well performance, design and
optimization program.
• PROSPER is designed to allow the building of reliable
and consistent well models, with the ability to
address each aspect of well bore modelling PVT, VLP
correlations and IPR.
• PROSPER enables detailed surface pipeline
performance and design: Flow Regimes, pipeline
stability, Slug Size and Frequency.
11

12. • Design and optimize well completions including
multi-lateral, multilayer and horizontal wells.
• Design and optimize tubing and pipeline sizes.
• Design, diagnose and optimize Gas lifted, Hydraulic
pumps and ESP wells.
• Calculate pressure losses in wells, flow lines and
across chokes.
• Predict flowing temperatures in wells and pipelines.
• Calculate total skin and determine breakdown.
• Allocate production between wells.
12

13. D:Koya UniProd Eng II - 2015-2016projec tH.W OptPROSPE R ModelT 04_HORIZONT ALOILWE LL.Out
0 21000 42000 63000 84000
0
1000
2000
3000
4000
IPR plot Horizontal Well - No Flow Boundaries (HW 05/14/2016 - 11:58:15)
Rate (S T B/day)
Pressure(psig)
Inflow T ype Single Branch
Completion Cased Hole
Sand Control None
Gas Coning No
Reservoir Model Horizontal Well - No Flow Boundaries
M& G Skin Model Enter Skin B y Hand
Compaction Permeability Reduction Model No
Relative P ermeability No
Formation PI 41.07 (ST B /day/ps i)
Absolute Open Flow (AOF)82543.8 (ST B /day)
Reservoir Pres sure4000.00 (ps ig)
Reservoir T emperature200.00 (deg F)
Water Cut 0 (perc ent)
T otal GOR400.00 (sc f/S T B)
Reservoir Permeability150.00 (md)
Reservoir T hic knes s 100.0 (feet)
Wellbore Radius 0.354 (feet)
Reservoir Porosity (fraction)
Horizontal Anis otropy 1 (fraction)
Vertic al A nisotropy 0.1 (fraction)
Length Of Well2000.0 (feet)
Reservoir Length5000.0 (feet)
Reservoir Width5000.0 (feet)
Dis tanc e From Length E dge T o Centre Of Well2500.0 (feet)
Dis tanc e From Width Edge T o Centre Of Well2500.0 (feet)
Dis tanc e From Bottom T o Centre Of Well 50.0 (feet)
Skin 5
AOF : 82543.8 (ST B/day)
Formation PI : 41.07 (ST B/day/psi)
SK IN : 5
Results: IPR curve
13

14. Results: Well Capacity
0 10000 20000 30000 40000
0
1500
3000
4500
6000
Inf low (IPR) v Outf low (VLP) Plot (HW 05/15/2016 - 08:35:04)
Liquid Rate (STB/day)
Pressure(psig)
PVT Method Black Oil
Fluid Oil
Flow Type Tubing
Top Node Pressure250.00 (psig)
Water Cut 0 (percent)
Bottom Measured Depth8050.0 (feet)
Inflow Type Single Branch
Completion Cased Hole
Sand Control None
Solution Point
Liquid Rate18453.6 (STB/day)
Oil Rate18453.6 (STB/day)
Water Rate 0 (STB/day)
Gas Rate 7.381 (MMscf/day)
Solution Node Pressure3354.18 (psig)
dP Friction 823.12 (psi)
dP Gravity2237.76 (psi)
dP T otal Skin 196.48 (psi)
dP Perforation 0 (psi)
dP Damage 0 (psi)
dP Completion 0 (psi)
Completion Skin 5.00
Total Skin 5.00
Wellhead Liquid Density 52.761 (lb/ft3)
Wellhead Gas Density0.87847 (lb/ft3)
Wellhead Liquid Viscosity 2.3440 (centipoise)
Wellhead Gas Viscosity0.012674 (centipoise)
Wellhead Superficial Liquid Velocity 14.432 (ft/sec)
Wellhead Superficial Gas Velocity 56.913 (ft/sec)
Wellhead Z Factor0.96557
Wellhead Interfacial Tension14.9531 (dyne/cm)
Wellhead Pressure 250.00 (psig)
Wellhead Temperature 172.16 (deg F)
First Node Liquid Density 52.761 (lb/ft3)
First Node Gas Density0.87847 (lb/ft3)
First Node Liquid Viscosity 2.3440 (centipoise)
First Node Gas Viscosity0.012674 (centipoise)
First Node Superficial Liquid Velocity 14.432 (ft/sec)
First Node Superficial Gas Velocity 56.913 (ft/sec)
First Node Z Factor0.96557
First Node Interfacial T ension14.9531 (dyne/cm)
First Node Pressure 250.00 (psig)
First Node Temperature 172.16 (deg F)
E
E
E
14

15. Results: Well Length Optimization Reuslts
0 10000 20000 30000 40000
0
1500
3000
4500
6000
Inf low (IPR) v Outf low (VLP) Plot (HW 05/14/2016 - 12:04:10)
Liquid Rate (STB/day)
Pressure(psig)
PVT Method Black Oil
Fluid Oil
Top Node Pressure250.00 (psig)
Water Cut 0 (percent)
Inflow Type Single Branch
Completion Cased Hole
Variables
1:Well Length (feet)
1 2 3
0=500.0
1=1000.0
2=1500.0
3=2000.0
4=2500.0
5=3000.0
0
0
E
E
E
1
1
E
E
E
2
2
E
E
E
3
3
E
E
E
4
4
E
E
E
5
5
E
E
E
15

16. Results: Well Length Sensitivity Results
16

17. Results: Well Length Sensitivity Results
0
500
1000
1500
2000
2500
3000
3500
4000
0 500 1000 1500 2000 2500 3000 3500
Pwf
Well Length
17

18. Results: Well Length Sensitivity Data Results
Well length in
ft
Pressure in
psi
Production rate
STB/day
500 2706.98 11689.5
1000 3036.53 15233.2
1500 3226.67 17152.5
2000 3354.18 18453.6
2500 3448.84 19379.3
3000 3522.08 20062.4
18

19. • With increasing length, pressure
drop must be increased.
• Also with increasing length, Pwf &
Flowrate will be increased.
19

20. 20
well length Pwf dp friction dp gravity
500 2706.98 388.5 2045.59
1000 3036.53 600.26 2153.6
1500 3226.67 728.4 2207.15
2000 3354.18 823.1 2237.77
2500 3448.84 892.15 2259.63
3000 3522.08 944.54 2275.82

21. 21

22. • Horizontal wells are better than vertical.
• To optimize production in horizontal wells, many factors can
be considered.
• The production can be optimized by increasing of length of
horizontal section.
• The PROSPER can be helpful to achieve the results, it may be
used to choose the best result.
22

23. 1. Petroleum Production Engineering, A Computer-Assisted Approach by
Boyun Guo, PH.D. , William C. Lyons, PH.D. and Ali Ghalambor, PH.D.
2. Production Optimization Using Nodal Analysis by H. Dale Beggs, 1991
Oklahoma.
3. Development and Applications of Production Optimization Techniques by
PENGJU WANG, 2003 Stanford.
4. Pressure drop evaluation along pipelines
https://www.scribd.com/doc/284696108/Theory
5. Fluid-Flow Theory, Energy Losses in Flow
http://www.nzifst.org.nz/unitoperations/flfltheory5.htm#frictioninpipes
6. Pressure Loss Form Fittings – Expansion and Reduction in Pipe Size
https://neutrium.net/fluid_flow/pressure-loss-from-fittings-expansion-
and-reduction-in-pipe-size/
23

24. 7. Flow in Pipes
http://www.uomisan.edu.iq/eng/ar/admin/pdf/26059867395.pdf
8. Bends, Flow and Pressure Drop in by Jayanti, Sreenivas
http://www.thermopedia.com/content/577/
9. Its application to well producing system was first proposed by Gilbert
(1954)
10. PROSPER, Petroleum Experts, User Manual, Version 11.5, January 2010
24

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