pfe sans gas calculation

ESP Design using

Realized and presented by: Omar Omrane

AutographPC softwarehand sizing and

Presentation of mygraduation project:

Project plan

1 Oil and Gas general overview

2

Electrical submersible pump

ESP hand sizing design

ESP software design

Economic study of the project

2

3

4

5

Conclusion6

1.Gas and Oil general overview

PRODUCED FLOWRATE

SURFACE PRESSUREAt Wellhead

Pwf

Po

Reservoir Pressure- Pr

•If Pothe well will flow naturally

(~6% of wells by number)

< Pwf•If Pothe well will require Artificial lift

(~94% of wells worldwide)

> Pwf

3

1.Gas and Oil general overview

Gas Lift

ESP

PC Pumps

Hydraulic Pumps

Beam pump

4

Electrical submersible pump

5

2.Electrical submersible pump

Typical ESP System Electrical Power Cable

Submersible Pump

Pump Intake

Motor

Protector

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Centrifugal pump

The heart of the ESP

system:

- Converts kinetic energy

to potential energy

Gas separator

A pump protector:

- Prevents high amount

of free gas to enter the

pump

Seal section

A motor protector:

-Provides a reservoir for

the thermal expansion of

the motor's oil.

-Isolates the clean motor

oil from wellbore fluids

Motor

-Transforms electrical

energy into motion

Power cable

-Transforms electrical

energy from the surface

down to the submersible

components.

7


Surface Equipments

9


10


Wellhead function -Suspends the tubing string

-Controls high pressures

Junction Box function

- Allows for any gas to vent - Provides easy point for electrically checking

Transformer function

-Powers the surface equipments -Transforms and sends correct voltage to the motor controller

Motor controller function

- Provides soft start to the motor - Motor protection from overload and underload

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ESP hand sizing Design

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3. ESP Hand sizing Design

Basic dataProduction capacityGas calculationTotal dynamic headPump selectionProtector selection Motor selectionPower cable selectionMotor controller selection

Basic Design workflow

13


Well data Casing size: 9 5/8"OD (8.681" ID) Liner size: 7” OD Tubing size: 3 ½” OD(2.991” ID) Pump setting depth: 10170.48 ft Perforated hole interval: From

11023.488 ft to 11305.63 ft

1. Basic Data (Cherouq1)

14


Production Data Wellhead pressure: 220 Psi Bottom Hole Temperature: 197 °F Desired production rate: 3000

BFPD Gas Oil Ratio GOR: 1577 scf/stb Water Cut: 98.5 %


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Well fluid conditionSpecific gravity of water: 1.2 Oil API°: 42.3 Specific gravity of the gas: 0.84Bubble point pressure: 4080 PsiBubble point temperature: 197 °FPVT data: PI= 1.8 bbl/day/psi


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2. Production Capacity (Cherouq1)

Pwf�PIP = 2029 psi PSI

PIP�

17


PIP Calculation steps Pwf =2533 PsiSGliquid=1.159 Head(ft)=994 ftPSI= 499 psi FT(ft) =9.94 ft FT(psi) =5 psi 18


10 per 1000ft 3000

BPD

7 in OD

19

3. Gas Calculation (Cherouq1)


% Free gas at pump intake = 5.81%< 10% Where

20


Gas Calculation steps Rs=657scf/stb Bo= 1.87bbl/bbl Bg =0.7 bbl/mcf Vg = 289 mcf Vt = 3476 bbl 21

4. Total Dynamic Head


𝑭𝒕𝑯𝒅

𝑷𝒅

TDH = 7064 ft 22

4. Total Dynamic Head calcuation steps


Pd = 438 ft Hd = 6127 ft Ft = 498 ft

23

𝑭𝒕𝑯𝒅

𝑷𝒅

23


3000BPD

31/2 in OD49 per 1000ft

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5. Pump Selection requirement


520 m3/d 68%1.34 Hp =37.73 ft =188

=293.651 Hp 25


520 M3/d

11.5 M

68 %

1KW

P37 performance curve 26

3. ESP Hand sizing Design SSD

139

50 No:6

No:16

Number of stages =189

27

6. Seal Section selection specifications


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6. Seal Section selection specification


1.92 119 GSB3

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7. Motor selection specifications


297.051 Hp 2758 Volt77 Am 89.9%

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7. Motor selection Baker catalog


2758 V/77 Am 334HpSelected Motor horse power 31

8. Cable selection (Cherouq1)


198 °F

77 Am

260 °F 32

8. Cable selection


C76243 4 AWG 5KV 1.19 in 33

Round

8. Cable selection Baker catalog


4 AWGCable Size

1.18 in Cable dimension

5KVCable Rating 34

9. Motor Controller Selection


487 KVA 533 Am

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9. Motor Controller Selection Baker catalog


519 KVA 624 AMMotor controller KVA

Motor controller Amp 36

Software Design

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4. ESP software design Well data screen capture

TDH=1910 m

Well

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Pump selection screen capture

4. ESP software design

Pump type: 538P31 series

Pump

Pump stages = 129 Pump power = 267.1 Hp Pump frequency = 59.7 Hz3064 bbl/d

1940 M Flowrate at the surface =3064 bbl/d

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4. ESP software design Motor selection screen capture

Motor

Motor power = 300 HpMotor voltage = 3510 VMotor amperage = 55 amMotor load = 89.83 %Motor type: 450MSP1 series 40

4. ESP software design Seal section selection

Seal

Seal: 513 series GSB3 41

4. ESP software design Cable selection

Cable

Cable: 4AWG CELR 5KV rating 42

4. ESP software design Motor Controller selection

MotorController

Motor controller: 8600-VT 494 KVA 750 AMP

Motor controller amperage = 750 amMotor controller KVA = 494 KVA

Step up ratio = 9.254

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Economic study

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4. Economic Study

Net Present Value NPV: the sum of all project cashflows, discounted back to a common point in time NPV = 1409000 $ > 0

The project is profitable

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5.Conclusion

This project focused mainly the outflow

performance that’s mean the use of a lifting

system to regain well production. It can be

extended to discuss other alternatives dealing

with inflow performance of the well to enhance

reservoir capacity like (Hydraulic fracture and

acid job)

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5.Conclusion

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pfe sans gas calculation

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