Oman LNG complex • SMOC on Main Cryogenic Heat Exchanger ...members.igu.org/html/wgc2006pres/data/wgcppt/pdf/PGC Program… · Conclusions Oman LNG project • Main benefit is maximisation

WGC June 2006 - Amsterdam 1

• Oman LNG complex

• SMOC on Main Cryogenic Heat Exchanger

• Conclusions

The Oman LNG story

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Oman and Qalhat LNG complex

MUSCAT

SURCENTRALOMANGASFIELDS

QALHAT

Location: Qalhat, near Sur

Product: Liquefied Natural Gas (LNG)

Feed: Natural Gas from Central Oman

Export: 10.4 mtpa LNG / 3 trains

Markets: Korea, Japan, Europe, US

Transport: by Ship

SHAREHOLDERS

• Govt Oman

• Shell Gas

•Total Oman

• Korea LNG

• Mitsubishi Corp

• Mitsui & Co

• Partex Oman

• Itochu Corp.

•Union Fenosa Gas

Sultanate of Oman

Saudi Arabia

Yemen

RS5

Dia 2

RS5 two first trains started in 20003rd train started end 2005Roland Silve; 30-4-2006

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Cooling cycles

NG LNG

MR

C3

Cooling water

Air

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E-1415

KT-1420 K-1420 K-1430A K-1430B

V-1420

V-1421V-1422

V-1425

N2 C1 C2 C3

Fuel Gas

E1414 E1413 E1412 E1411

E1420

E1433

GT-1410

14FFIC-050

LMR90%

10%

HMR

14TICA-034

14TI-019

14FI-015

14FRC-009

14UIC-480DEV

C3 LP C3 MP C3 HP C3 HHP

E1421

14HIC-047IGV

Cold JT

E1422

14UIC-440DEV 14UIC-460DEV

14EI-005

M14PIA-022

14TR-024

14TDR-016

14TR-025

-14TR-017

+14TR-129

14TDR-024

FROMSCRUB COLUMNREFLUX DRUM

M-1401S-1401

NGL'S FROMFRACTIONATION

S-1402FROMSCRUB COLUMNREFLUX PUMPS

LNG PRODUCTTO

STORAGE

END FLASH GASTO

UNIT 4400

BOIL-OFF GASFROM LNG STORAGE

C-1431

GT-1420

14FICA-010

14PICA-69914XIC-003

E1432

14HIC-129

CW CW

CW

14FRQ-012

14TRA-015

14PDIA-096

14QR-028 N2

14PISA-819

14PI-820

Warm JT

LNG

LMR

HMR

14HIC-147

14GI-020

14FR-029

14TIA-028

14TR-027

14FI-052

14FRCQ-026 14FRCQ-024 14FRCQ-025 14FRCQ-036

14LIA-037

FFRQE

14QR-048 : N214QR-041 : C114QR-042 : C214QR-043 : C3

>

034PIC-020B

K1450

14HIC-121

Drain to C-1501 Inlet

44FIC-007

Vent to V-4401

Warm Bottom

Warm Top *Cold Bottom*

Cold Top*

14EI-009

MeasurementsOutputs

Liquefaction RS2

Dia 4

RS2 works like a big refrigeratorNG streamcooling system : NG cooled by MR, MR cooled by C3, C3 cooled by SCW

Complexity13 CV10 MVMaximun LNG production given by maximum refrigeration capacity (maximum shaft power)=>Push to maximum helper motor powerRoland Silve; 30-4-2006

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Plot-0

30/10/2000 18:23:46 06/11/2000 18:23:467.00 Day(s)

24

26

28

32

34

36

22

38

[°C]

Ambient air temperature (diurnal effect)

30

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Constraint pushing without APC OTHER PERIODS

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

0 2000 4000 6000 8000 10000 12000 14000

T min

MW

MR_HELPER_PWR PROP_HELPER_PWR MR_HELPER_AVG PROP_HELPER_AVG

PROP_AV = 2.84

MR_AV = 4.38

0 1 5 7 9

Time (Days)2 3 4 6 8 10

RS4

Dia 6

RS4 Controlled by operatorRoland Silve; 29-4-2006

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Last period

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

18/10/200200:00

19/10/200200:00

20/10/200200:00

21/10/200200:00

22/10/200200:00

23/10/200200:00

24/10/200200:00

25/10/200200:00

26/10/200200:00

Tmin

MW

MR_HELPER_PWR PROP_HELPER_PWR MR_HELPER_PWR_AV PROP_HELPER_PWR_AV

PROP_AV = 6.13

MR_AV = 5.99

0 1 2 3 4 5 6 7 8

Time (Days)

Constraint pushing with APC (SMOC) RS11

Dia 7

RS11 Controlled by SMOCBelow the limitClose to the limitRoland Silve; 3-5-2006

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SMOC Pro performanceThroughput is maximised under fluctuating ambient conditions

APC is ON all the time33000 34000 35000 36000 37000 38000 39000

Tmin [days]1 2 3 4 5

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Conclusions Oman LNG project

• Main benefit is maximisation LNG production (result: 2 extra cargos per year).

• Improved quality control and efficiency of fractionation unit.

RS8

Dia 9

RS8 SMOC discussions about overall philosophy led to a change on base layer Process Control : BOG & EFG control scheme in combination with FGB recycle to feed. - Reduction of 150 t/d of quench.Roland Silve; 1-5-2006

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• Less operator interventions – less risk of human error.

• Under unstable conditions, one operator can operate two trains.

• Under normal conditions, more time for operators to optimise.

• SMOC implementation required detailed review of base layer control resulting in improvements.

Additional BenefitsRS9

Dia 10

RS9 Facility of increasing throughput of the plant by adjusting one single parameter

SMOC discussions about overall philosophy led to a change on base layer Process Control : BOG & EFG control scheme in combination with FGB recycle to feed. - Reduction of 150 t/d of quench.

Roland Silve; 3-5-2006

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Final remarks

• LNG operations can be improved by applying APC.

• Most significant benefits are more LNG & LPG production, higher efficiency and more reliability.

• Projects show a 6 month return on investment or better.

• All Shell Global Solutions advised plants have APC implemented or under development. Oman LNG is an illustrative example of a possible result.

• APC aims at automatic online control of a total unit or LNG train 24 hours a day, every day in day out….

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Thank You!