2007-6031-2j-0007 rev h re-afd pipeline hydraulic analysis_approved
TRANSCRIPT
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Cuu Long Join t Operating CompanySu Tu Trang LTPTP - Wellhead Platform and Pipeline
Engineering, Transportation and Installation
DOCUMENT TITLE: PIPELINE HYDRAULIC ANALYSISDOCUMENT NO.: 2007-6031-2J-0007
Rev. H
REVISION RECORD SHEET
No. Rev. No. Content of Revis ion D
1 A Issued for Comments
2 B Re-Issued for Comments
Previous document number was 2007-6031-2J-7107.Revised to incorporate CLJOC comments.
3 C Re-Issued for Comments
Revised to incorporate CLJOC comments.
4 D Issued for Approval
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DOCUMENT TITLE: PIPELINE HYDRAULIC ANALYSISDOCUMENT NO.: 2007-6031-2J-0007
Rev. H
TABLE OF CONTENTS
1.
INTRODUCTION ...............................................................................................................
2. SUMMARY AND CONCLUSIONS ...................................................................................
2.1 Summary ..........................................................................................................................2.2 Conclusions ......................................................................................................................
3. PIPELINE SYSTEM DESCRIPTION .................................................................................
3.1 Platform Data ....................................................................................................................
3.2
Pipeline, Expansion Loops, Expansion Loop Tie-Ins and Riser Details ..........................3.2.1 Pipeline and External Coating Data .................................................................................
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DOCUMENT TITLE: PIPELINE HYDRAULIC ANALYSISDOCUMENT NO.: 2007-6031-2J-0007
Rev. H
NOTATION
5LPP 5 Layer Polypropylene
BBL Barrel
BOPD Barrels of Oil Per Day
BWPD Barrels of Water Per Day
CA Corrosion Allowance
CD Chart Datum
COJ Centre of Jacket
CPP Central Production Platform
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DOCUMENT TITLE: PIPELINE HYDRAULIC ANALYSISDOCUMENT NO.: 2007-6031-2J-0007
Rev. H
UG Gas Velocity
UL Liquid Velocity
WATC Total Water Content in Branch (m3)
WGS World Geodetic System
WHCP Well Head Control Panel
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DOCUMENT TITLE: PIPELINE HYDRAULIC ANALYSISDOCUMENT NO.: 2007-6031-2J-0007
Rev. H
1. INTRODUCTION
This report has been prepared for Cuu Long Joint Operating Company (CLJ
Detailed Engineering design project for the development of the Su Tu Trang located offshore the Socialist Republic of Vietnam.
As part of the development of the Block 15-1, CLJOC intends to install a Long
Test Program (LTPTP) wellhead platform, pipeline and other associated facil
Trang field as well as send production from the Su Tu Trang LTPTP to the CP
The overall development concept consists of the following components:
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DOCUMENT TITLE: PIPELINE HYDRAULIC ANALYSISDOCUMENT NO.: 2007-6031-2J-0007
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Figure 1 Overall Field Layout of Block 15-1 Field Development
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DOCUMENT TITLE: PIPELINE HYDRAULIC ANALYSISDOCUMENT NO.: 2007-6031-2J-0007
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2. SUMMARY AND CONCLUSIONS
2.1 Summary
The hydraulic analysis simulation was performed for the following pipeline:
- 12 pipeline from LTPTP to CPP
The objectives of the steady state hydraulic analysis are as follows:
- Determine the boundary between non-insulated (FBE) and insulate
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DOCUMENT TITLE: PIPELINE HYDRAULIC ANALYSISDOCUMENT NO.: 2007-6031-2J-0007
Rev. H
Based on the insulation boundary, the following 26 cases were calculated.
Case A1 - to generate the temperature and pressure profiles for mechan
Case A2 - to verify the pipeline flow capacity of 50 MMscfd.
- based on maximum flow rate, inlet temperature of 101C, m
temperature, half- buried.
Case A3 - to generate the temperature and pressure profiles considerin
pipeline (5LPP with concrete coating).
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Table 2.1-2 Summary of Analys is Cases
Units
Maximum Flow Cases Low Flow Cas
PrepCase
A1 A2 A3 B1 B
Inlet Temperature C 150 150 101 150 83.4 83
Inlet Temperature F 302 302 213.8 302 182.1 182
Outlet Temperature C 29.2 79.5 51.1 88.4 19.6 19
Inlet Pressurecalculated in analysis
BarG 33.1 37.5 33.6 38.7 11.3 11
Total Gas Flowrate MMscfd 50 10
Cases
InputParameters
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Table 2.1-2 Summary of Analys is Cases (Continued)
Units
Var
Flow from 1 Well
C9 C10 C11 C12 C13 C14
Inlet Temperature C 147.3 140.9 121.1 79.5 102.2 83.4
Inlet Temperature F 297.1 285.6 250 175.1 216 182.1
Outlet Temperature C 76.0 59.9 32.8 26.0 35.4 28.2
Inlet Pressurecalculated in analysis
BarG 37.4 22.5 13.1 11.5 29.4 18.6
Total Gas Flowrate MMscfd 50 30 15 5 50 30 C d t C t t bbl / MM f
Cases
InputParameters
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DOCUMENT TITLE: PIPELINE HYDRAULIC ANALYSISDOCUMENT NO.: 2007-6031-2J-0007
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3. PIPELINE SYSTEM DESCRIPTION
3.1 Platform Data
The coordinates of the platforms are given below.
Table 3.1-1 Platform Coordinates
S/No Location RemarksReference
Point
Coordinates
Easting (m) Northi
1 LTPTP Proposed COJ 867,000 1,130
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3.2.1 Pipeline and External Coating Data
The external coating data are presented in Table 3.2-2.
Table 3.2-2 Pipeline and External Coating Data
External Coating Data
Su Tu Trang EPS to Su Tu Vang CPPPrepCase
Cases A1 to A2,B1,B2 andC1 to C21
Ri t LTPTPCorrosion Coating
M t i l FBE
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DOCUMENT TITLE: PIPELINE HYDRAULIC ANALYSISDOCUMENT NO.: 2007-6031-2J-0007
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The following figure presents a schematic of the 12 riser and pipeline system
and CPP.
Figure 3.1: General Riser and Pipeline Model Configuratio
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The pipe wall and the external coating material thermal properties used are giv
Table 3.2-3 Material Thermal Propert ies
Material Density (kg/m3)
Thermal Conductivity(W/m-K)
Hea
Steel Pipe 7850 50
5LPP 760 0.185
FBE 1450 0.3
Concrete 3040 1.74
Riser Splash Zone Coating 1907 0.2
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Table 3.3-1 Operating Condit ions (Pressure, Temperature) and Flow Rates
Units
Maximum Flow Cases Low Flow Cas
PrepCase
A1 A2 A3 B1 B
Inlet Temperature C 150 150 101 150 83.4 83
Inlet Temperature F 302 302 213.8 302 182.1 182
Outlet Temperature CTo
Inlet Pressure BarG
Total Gas Flowrate MMscfd 50 10
Cases
InputParameters
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Table 3.3-1 Operating Condit ions (Pressure, Temperature) and Flow Rates
Units
Var
Flow from 1 Well
C9 C10 C11 C12 C13 C14
Inlet Temperature C 147.3 140.9 121.1 79.5 102.2 83.4
Inlet Temperature F 297.1 285.6 250 175.1 216 182.1
Outlet Temperature CTo be d
Inlet Pressure BarG
Total Gas Flowrate MMscfd 50 30 15 5 50 30
Condensate Content bbl / MMscf
Cases
InputParameters
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3.4 Environmental Conditions
The following figure shows the application of the air and seawater velocities
considered in the hydraulic analysis.
Figure 3.4.1: Application of Velocit ies and Temperatures at L
AT
Air
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The environmental conditions were taken from the Structural Basis of Design a
of Design.
The ambient air temperature and seawater properties used in the analysis aTable 3.4-1.
Table 3.4-1 Surrounding Temperature
Ambient Air Temperature
Units Minimum Mean Ma
Temperature C 19 27
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Note:
1. The current and wind velocities are based on the Metocean Criteria
(2003-4000-6B-0002, Rev. A).
The following soil parameters were used with the FEMtherm module to mod
half-buried into the seabed soil for Preparatory Case Study, Cases A1 to A3, B
Case B2 has been modelled as non-buried.
Soil Type : Sand
Seabed Soil Density (sand) : 2500 kg/m3
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Component Mole % Molecular WeightIdeal Liq
G
Heptanes 0.93
Methycyclohexane 0.43
Toluene 0.31
Octanes 0.96
Ethylbenzene 0.04
M-, P-Xylene 0.25
O-Xylene 0.06
Nonanes 0 69
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The fluid composition was modified by adding condensate components and
condensate and water flow rates as in Table 3.2-1 at separator conditions (
MPa and temperature of 115.6 C). The modified compositions are presented
Table 3.5-2 presents the modified fluid compositions to be used in the differen
- Fluid 1 represents the fluid composition with condensate flow rate o
and water flow rate of 100 bbl / MMscf.
- Fluid 2 represents the fluid composition with condensate flow rate o
and water flow rate of 0 bbl / MMscf.
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ComponentFluid 1 Fluid 2
Mol % Mol %
o-Xylene 0.046 0.076
Ps-Cumene 0.047 0.079
C7 0.654 1.09
C8 0.696 1.159
C9 0.517 0.86
C10 0.462 0.767
C11 0.39 0.647
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3.6 Fluid Densi ties
The fluid densities for pressures 10 to 90 barg at temperatures 100 C
presented in the table below.
Table 3.6-1 Fluid Densi ties
Fluid Density (kg/m3)
Pressure(barg)
10 20 30 50
Temperature
(C)
100 16.9 34.5 52.7 89.8
150 9 3 23 4 38 3 68 8
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Table 3.6-2 Data Summary for Su Tu Trang Fluid Samples
Hydrocarbon Samples Well ST-1X ST-3X
DST 3 1
Field Sample No. 3-27 1-38
Sand F F
Fluid Type Condensate CondensateV
Da
PAT Sample No. 39250-91-1 39250-91-2
Fluid Property Method Results Results
Density (g/cc @ 20
o
C) DMA5000 0.783 0.7799
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4. BASIS OF STUDY
The study was carried out using OLGA software (OLGA v 5.3.2.2). Appendix
details about OLGA and the general level of accuracy that can be expectesimulations. In addition to the basic OLGA software, the following optional O
used.
FEMtherm module this enables the pipeline to be modelled and
buried into the seabed, taking into account the density, thermal con
capacity of the seabed soil.
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Seabed profile along the planned pipeline route from LTPTP to CPP is sh
below.
Figure 4-1: Seabed Prof ile of Pipeline Route from LTPTP to CPP
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5. ANALYSIS RESULTS
5.1 Boundary of Insulation
The maximum operating temperature in the segment without 5LPP coating w
Preparatory Case Study as shown by the graphical plots in Appendix A. Fro
profile for Preparatory Case Study, the point at which the fluid temperature is
determined. This occurs at the point 456m from the start of the pipeline mod
KP 0.247 along the actual pipeline route with reference to Pipeline Routing
2007-6031-2I-0002. Only FBE (corrosion coating) and concrete coating sha
KP 0 to KP 0 247 of the pipeline route 5LPP shall be applied to downstreamKP 0 247 It h ll b t d th t P t C St d h ff
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PipelineFlow rates(MMscfd)
CasePIN
(barg)Pressure Drop
(barg)
LTPTP to
15 C7 12.7 3.4
5 C8 11.5 2.2
50 C9 37.4 28.1
30 C10 22.5 13.2
15 C11 13.1 3.8
5 C12 11.5 2.2
50 C13 29.4 20.1
30 C14 18 6 9 3
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with FBE coating used in Preparatory Case Study. This temperature trend w
the pressure profile along the pipeline.
The flow in the pipeline is stratified along the seabed and semi-annular uPreparatory Case Study and Cases A1 to A3.
The Capacity Verification Case A2 has been performed to check the inlet pr
than 36.4 barg. The PINobtained for this case is 33.6 barg. Hence, the inlet p
case is adequate.
The inlet pressures for Cases A1 to A3 are acceptable as they are less
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For extremely low flow cases C4, C8 and C12, the simulation did not achieve
explains the fluctuating behaviour of the liquid content in the pipeline.
For these 5 MMscfd gas flow rate cases, the TOUT temperatures for the
bbl/MMscf and 100 bbl/MMscf water content in the fluid composition, are 26
26.0C respectively.
All the temperature profiles for the cases (Cases C1 to C21) follow the
described in Case A1.
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For cases with flow rates above 15 MMscfd, the flow in the pipeline is ma
annular at the risers.
Brief increases of gas and liquid velocities occur due to the removal of slugs in
do not cause any problems during low flow conditions.
A comparison between the water content in the fluid and its effect on the TO
flow rates was made to study the possibility of waxing due to low flow conditio
Cases C13 to C21 were considered as they are simulated as receiving flow
have lower inlet temperatures
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From Appendix B of "Process Basis of Design" (Ref. 4), the WAT (W
Temperature) is relatively high, ranging from 34 deg C to 50 deg C. On th
calculated arriving temperature at Su Tu Vang (STV) CPP is lower than 34
cases with low flow rates. It should be, therefore, noted that there would be a
low flow rate in order to avoid wax appearance during operation.
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Table 5.2-2 Summary of Steady State Simulation Results
Pipeline CaseQGST
(MMscfd)
QOST(bopd)
QWST(bwpd)
PIN(barg)
POUT(barg)
TIN(C)
TOUT(C)
Prep. Case 50 7500 5000 33.1 9.31 150 29.2
A1 50 7500 5000 37.5 9.31 150 79.5
A2 50 7500 5000 33.6 9.31 101 51.1
A3 50 7500 5000 38.7 9.31 150 88.4
B1 10 1500 0 11.3 9.31 83.4 19.6
B2 10 1500 0 11.3 9.31 83.4 19.5
C1 50 7500 0 30.5 9.31 136 42.9
C2 30 4500 0 19 1 9 31 123 5 31 3
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Pipeline CaseQGST
(MMscfd)QOST
(bopd)QWST
(bwpd)PIN
(barg)POUT
(barg)TIN(C)
TOUT(C)
LTPTP toCPP
C17 30 4500 1500 19.7 9.31 97.5 35.9
C18 15 2250 750 12.5 9.31 69.3 26.7
C19 50 7500 5000 35.3 9.31 123.9 61.0
C20 30 4500 3000 21.1 9.31 107.9 43.2
C21 15 2250 1500 12.9 9.31 79.5 28.1
Note:
1 Flow Regime: 1 Stratified 2 Annular 3 Slug 4 Bubble
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6. REFERENCES
Ref. Doc. No. Title
1 2007-6031-2H-0001 Pipeline Basis of Design
2 STT-TQ-T-0002 Technical Query Hydraulic Analysis Proced
3 2007-6031-2K-0001 Proposed STT EPS to STV CPP PipelSurvey (TL Report), Rev. 1.
4 2007-4700-9H-0003 Process Basis of Design (Rev. M)
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STEADY STATE SIMULATION PLOTS
Figure 1: Steady State Preparatory Case Study, TIN= 150oC, POUT= 9.31 barg, F
(Temperature Profile)
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Figure 2: Steady State Preparatory Case Study, TIN= 150oC, POUT= 9.31 barg, F
(Pressure Profile)
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Figure 3: Steady State Preparatory Case Study, TIN= 150oC, POUT= 9.31 barg, F
(Liquid Volume Fraction Profi le - HOL)
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Figure 4: Steady State Preparatory Case Study, TIN= 150oC, POUT= 9.31 barg, F
(Flow Regime Indicator Profile)
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Figure 5: Steady State Preparatory Case Study, TIN= 150oC, POUT= 9.31 barg, F
(Gas Velocity)
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Figure 6: Steady State Preparatory Case Study TIN= 150oC, POUT= 9.31 barg, Fu
(Liquid Velocity)
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Figure 7: Steady State Preparatory Case Study, TIN= 150oC, POUT= 9.31 barg, F
(Total Liqu id Content in Branch - LIQC)
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Figure 8: Steady State Preparatory Case Study, TIN= 150oC, POUT= 9.31 barg, F
(Total Oil Content in Branch - OILC)
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Figure 9: Steady State Preparatory Case Study, TIN= 150oC, POUT= 9.31 barg, F
(Total Water Content in Branch - WATC)
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Figure 10: Steady State Case A1, TIN= 150oC, POUT= 9.31 barg, FBE and 5LPP Co
(Temperature Profile)
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Figure 11: Steady State Case A1, TIN= 150oC, POUT= 9.31 barg, FBE and 5LPP Co
(Pressure Profile)
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Figure 12: Steady State Case A1, TIN= 150oC, POUT= 9.31 barg, FBE and 5LPP Co
(Liquid Volume Fraction Profile - HOL)
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Figure 13: Steady State Case A1, TIN= 150oC, POUT= 9.31 barg, FBE and 5LPP Co
(Flow Regime Indicator Profile)
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Figure 14: Steady State Case A1, TIN= 150oC, POUT= 9.31 barg, FBE and 5LPP Co
(Gas Velocity)
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Figure 15: Steady State Case A1, TIN= 150oC, POUT= 9.31 barg, FBE and 5LPP Co
(Liquid Velocity)
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Figure 16: Steady State Case A1, TIN= 150oC, POUT= 9.31 barg, FBE and 5LPP Co
(Total Liqu id Content in Branch LIQC)
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Figure 17: Steady State Case A1, TIN= 150oC, POUT= 9.31 barg, FBE and 5LPP Co
(Total Oil Content in Branch - OILC)
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Figure 18: Steady State Case A1, TIN= 150oC, POUT= 9.31 barg, FBE and 5LPP Co
(Total Water Content in Branch - WATC)
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Figure 19: Steady State Case A2, TIN= 101oC, POUT= 9.31 barg, FBE and 5LPP Co
(Temperature Profile)
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Figure 20: Steady State Case A2, TIN= 101oC, POUT= 9.31 barg, FBE and 5LPP Co
(Pressure Profile)
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Figure 21: Steady State Case A2, TIN= 101oC, POUT= 9.31 barg, FBE and 5LPP Co
(Liquid Volume Fraction Profile - HOL)
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Figure 22: Steady State Case A2, TIN= 101oC, POUT= 9.31 barg, FBE and 5LPP Co
(Flow Regime Indicator Profile)
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Figure 24: Steady State Case A2, TIN= 101oC, POUT= 9.31 barg, FBE and 5LPP Co
(Liquid Velocity)
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Figure 25: Steady State Case A2, TIN= 101oC, POUT= 9.31 barg, FBE and 5LPP Co
(Total Liqu id Content in Branch - LIQC)
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Figure 26: Steady State Case A2, TIN= 101oC, POUT= 9.31 barg, FBE and 5LPP Co
(Total Oil Content in Branch - OILC)
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Figure 27: Steady State Case A2, TIN= 101oC, POUT= 9.31 barg, FBE and 5LPP Co
(Total Water Content in Branch - WATC)
28 S S C 3 1 0oC 9 31 C
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Figure 28: Steady State Case A3, TIN= 150oC, POUT= 9.31 barg, Fully 5LPP Coate
(Temperature Profile)
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Fi 30 St d St t C A3 T 150oC P 9 31 b F ll 5LPP C t
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Figure 30: Steady State Case A3, TIN= 150oC, POUT= 9.31 barg, Fully 5LPP Coate
(Liquid Volume Fraction Profile HOL)
Figure 31: Steady State Case A3 T = 150oC P = 9 31 barg Fully 5LPP Coate
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Figure 31: Steady State Case A3, TIN= 150oC, POUT= 9.31 barg, Fully 5LPP Coate
(Flow Regime Indicator Profile)
Figure 32: Steady State Case A3 T = 150oC P = 9 31 barg Fully 5LPP Coate
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Figure 32: Steady State Case A3, TIN= 150 C, POUT= 9.31 barg, Fully 5LPP Coate
(Gas Velocity)
Figure 33: Steady State Case A3 T = 150oC P = 9 31 barg Fully 5LPP Coate
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Figure 33: Steady State Case A3, TIN= 150 C, POUT= 9.31 barg, Fully 5LPP Coate
(Liquid Velocity)
Figure 34: Steady State Case A3 TIN = 150oC POUT = 9 31 barg Fully 5LPP Coate
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Figure 34: Steady State Case A3, TIN= 150 C, POUT= 9.31 barg, Fully 5LPP Coate
(Total Liqu id Content in Branch - LIQC)
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Figure 36: Steady State Case A3 TIN = 150oC POUT = 9 31 barg Fully 5LPP Coate
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Figure 36: Steady State Case A3, TIN 150 C, POUT 9.31 barg, Fully 5LPP Coate
(Total Water Content in Branch - WATC)
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Figure 38: Steady State Case B1, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
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g y , IN , OUT g,
(Pressure Profile)
Figure 39: Steady State Case B1, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
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g y , IN , OUT g,
(Liquid Volume Fraction Profi le - HOL)
Figure 40: Steady State Case B1, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
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g y g
(Flow Regime Indicator Profile)
Figure 41: Steady State Case B1, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
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(Gas Velocity)
Figure 42: Steady State Case B1, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
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(Liquid Velocity)
Figure 43: Steady State Case B1, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
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(Total Liqu id Content in Branch - LIQC)
Figure 44: Steady State Case B1, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
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(Total Oil Content in Branch - OILC)
Figure 45: Steady State Case B1, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
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(Total Water Content in Branch - WATC)
Figure 46: Steady State Case B2, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
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(Temperature Profile)
Figure 47: Steady State Case B2, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
(P P fil )
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(Pressure Profile)
Figure 48: Steady State Case B2, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
(Li id V l F ti P fi l HOL)
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(Liquid Volume Fraction Profi le - HOL)
Figure 49: Steady State Case B2, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
(Fl R i I di t P fil )
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(Flow Regime Indicator Profile)
Figure 50: Steady State Case B2, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
(Gas Velocity)
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(Gas Velocity)
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Figure 53: Steady State Case B2, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
(Total Oil Content in Branch OILC)
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(Total Oil Content in Branch OILC)
Figure 54: Steady State Case B2, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP C
(Total Water Content in Branch - WATC)
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(Total Water Content in Branch WATC)
Figure 55: Steady State Case C1, TIN= 136oC, POUT= 9.31 barg, FBE and 5LPP C
(Temperature Profile)
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(Temperature Profile)
Figure 56: Steady State Case C1, TIN= 136oC, POUT= 9.31 barg, FBE and 5LPP C
(Pressure Profile)
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(Pressure Profile)
Figure 57: Steady State Case C1, TIN= 136oC, POUT= 9.31 barg, FBE and 5LPP C
(Total Liqu id Content in Branch LIQC)
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( q )
Figure 58: Steady State Case C2, TIN= 123.5oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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( p )
Figure 59: Steady State Case C2, TIN= 123.5oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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( )
Figure 60: Steady State Case C2, TIN= 123.5oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liqu id Content in Branch LIQC)
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Figure 61: Steady State Case C3, TIN= 97.8oC, POUT= 9.31 barg, FBE and 5LPP C
(Temperature Profile)
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Figure 62: Steady State Case C3, TIN= 97.8oC, POUT= 9.31 barg, FBE and 5LPP C
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Figure 63: Steady State Case C3, TIN= 97.8oC, POUT= 9.31 barg, FBE and 5LPP C
(Total Liqu id Content in Branch LIQC)
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Figure 64: Steady State Case C4, TIN= 57.4oC, POUT= 9.31 barg, FBE and 5LPP C
(Temperature Profile)
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Figure 65: Steady State Case C4, TIN= 57.4oC, POUT= 9.31 barg, FBE and 5LPP C
(Pressure Profile)
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Figure 66: Steady State Case C4, TIN= 57.4oC, POUT= 9.31 barg, FBE and 5LPP C
(Total Liqu id Content in Branch LIQC)
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Figure 68: Steady State Case C5, TIN= 143.3oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 69: Steady State Case C5, TIN= 143.3oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liqu id Content in Branch LIQC)
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Figure 70: Steady State Case C6, TIN= 134.1oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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Figure 72: Steady State Case C6, TIN= 134.1oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liqu id Content in Branch LIQC)
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Figure 73: Steady State Case C7, TIN= 111.7oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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Figure 74: Steady State Case C7, , TIN= 111.7oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 75: Steady State Case C7, , TIN= 111.7oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liqu id Content in Branch LIQC)
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Figure 76: Steady State Case C8, TIN= 69.3oC, POUT= 9.31 barg, FBE and 5LPP C
(Temperature Profile)
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Figure 78: Steady State Case C8, , TIN= 69.3oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liqu id Content in Branch LIQC)
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Figure 79: Steady State Case C9, TIN= 147.3oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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Figure 80: Steady State Case C9, TIN= 147.3oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 81: Steady State Case C9, TIN= 147.3oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liqu id Content in Branch LIQC)
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Figure 82: Steady State Case C10, TIN= 140.9oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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Figure 83: Steady State Case C10, TIN= 140.9oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 84: Steady State Case C10, TIN= 140.9oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liqu id Content in Branch LIQC)
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Figure 85: Steady State Case C11, TIN= 121.1oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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Figure 86: Steady State Case C11, TIN= 121.1oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 87: Steady State Case C11, TIN= 121.1oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liqu id Content in Branch LIQC)
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Figure 88: Steady State Case C12, TIN= 79.5oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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Figure 89: Steady State Case C12, TIN= 79.5oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 90: Steady State Case C12, TIN= 79.5oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liqu id Content in Branch LIQC)
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Figure 91: Steady State Case C13, TIN= 102.2oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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Figure 92: Steady State Case C13, TIN= 102.2oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 94: Steady State Case C14, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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Figure 95: Steady State Case C14, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 96: Steady State Case C14, TIN= 83.4oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liqu id Content in Branch LIQC)
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Figure 98: Steady State Case C15, TIN= 57.4oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 100: Steady State Case C16, TIN= 115.6oC, POUT= 9.31 barg, FBE and 5LP
(Temperature Profile)
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Figure 101: Steady State Case C16, TIN= 115.6oC, POUT= 9.31 barg, FBE and 5LP
(Pressure Profile)
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Figure 103: Steady State Case C17, TIN= 97.5oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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Figure 104: Steady State Case C17, TIN= 97.5oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 105: Steady State Case C17, TIN= 97.5oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liquid Content in Branch LIQC)
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Figure 106: Steady State Case C18, TIN= 69.3oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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Figure 107: Steady State Case C18, TIN= 69.3oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 108: Steady State Case C18, TIN= 69.3oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liquid Content in Branch LIQC)
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Figure 109: Steady State Case C19, TIN= 123.9oC, POUT= 9.31 barg, FBE and 5LP
(Temperature Profile)
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Figure 110: Steady State Case C19, TIN= 123.9oC, POUT= 9.31 barg, FBE and 5LP
(Pressure Profile)
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Figure 111: Steady State Case C19, TIN= 123.9oC, POUT= 9.31 barg, FBE and 5LP
(Total Liquid Content in Branch LIQC)
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Figure 113: Steady State Case C20, TIN= 107.9oC, POUT= 9.31 barg, FBE and 5LP
(Pressure Profile)
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Figure 114: Steady State Case C20, TIN= 107.9oC, POUT= 9.31 barg, FBE and 5LP
(Total Liquid Content in Branch LIQC)
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Figure 115: Steady State Case C21, TIN= 79.5oC, POUT= 9.31 barg, FBE and 5LPP
(Temperature Profile)
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Figure 116: Steady State Case C21, TIN= 79.5
oC, POUT= 9.31 barg, FBE and 5LPP
(Pressure Profile)
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Figure 117: Steady State Case C21, TIN= 79.5
oC, POUT= 9.31 barg, FBE and 5LPP
(Total Liquid Content in Branch LIQC)
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B.1 Geometrical System Definit ion
The OLGA model accepts a network of diverging and converging branch
consists of a sequence of pipes and each pipe is divided into sections
correspond to the spatial mesh discretisation in the numerical model.
Each branch starts and ends at a node. There are three different types of node
Terminal (free end) nodes, where boundary conditions must be specifie
Split nodes, where branches split
Merge nodes, where branches are coupled together
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This difference will not affect the steady state results provided that the inlet flo
same composition as in the PVT table. In transient simulations, as the fluids
different compositions, the changes of the physical properties and the chan
mass fractions with the changes of temperature and pressure will differ from t
PVT table. These differences are usually small.
As an alternative to PVT tables, it is possible to perform a simulation us
tracking, where the compositional data is provided in a feed file and the code c
properties internally. This means that the total composition may vary both i
and that no special consideration is needed for a pipeline network. This proce
accurate in simulations where the fluid compositional will change considerab
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Temperature
OLGA performs only one energy balance for the fluid and only one flu
computed in the middle of each pipe section. This temperature is an average
oil and water phases. Therefore, for reliable temperature calculations in OL
for thermal computations must be as accurate as possible. Such data are the
the fluid, pipe wall modelling and soil modelling in case of a buried pipeline.
Pressure
The accuracy of the pressure drop calculations in OLGA depends on the acc
data and on the quality of the physical models implemented in the code. Im
are pipeline profile, inner wall surface roughness and fluid properties such as
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Dynamic flow behaviour
The code has been tested against dynamic flow experiments, both typical sta
and terrain slugging experiments. The code has also been compared to variou
data from some field tests and the accuracy in predicted slugging frequenci
varies from very good predictions at typically terrain slugging conditions (
liquid slug volume predictions are within +/-10%), to inaccuracies of +/-100%
slugging conditions (slug volumes and frequencies are small for hydrodynam
the large spread). It should also be considered that the quality of the field
difficult to estimate. Data such as flow rates, pipeline profile and equilibrium
of the fluid can be crucial for the quality of the simulations in addition to the c
values for slug frequencies and slug sizes.
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APPENDIX C - ANALYSIS RESULTS FOR 3LPP AND 5LPP COATING APPLIED C
C1 : SUMMARY
This section presents the results of the hydraulic analysis for Preparatory Case (3L
with 3LPP coating and 5LPP coating based on the following coating arrangement.
LTPTP Riser = 2.2 mm 3LPP
LTPTP Expansion Loop Tie-in = 2.2 mm 3LPP with 43 mm concrete coating
Pipeline (temperature greater than 140 C) = 2.2 mm 3LPP with 54 mm concre
insulated)
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Table C-1 Summary of Analysis Cases
UnitsMaximum Flow Cases
Prep Case
Inlet Temperature C 150 1
Outlet Temperature F 302 3
Outlet Temperature C 31.2 8
Inlet Pressure calculated in analysis BarG 33.5 3
Total Gas Flowrate MMscfd 50
C d t C t t bbl / MM f 150
Cases
InputParameters
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Table C-2 Pipeline and External Coating Data
External Coating Data
Su Tu Trang EPS to Su Tu Vang CPP Prep Case
Riser at LTPTP
Corrosion Coating
- Material 3LPP
- Thickness (mm) 2.2
Expansion Loop
Corrosion Coating
- Material 3LPP
- Thickness (mm) 2.2
Hot End
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