Gela-Malta (Cost Estimate) Rev 2 3
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Transcript of Gela-Malta (Cost Estimate) Rev 2 3
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www.eni.it
Gela - Malta Project
April 2009
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2
Basis and Criteria of the Study
Results
Budgetary Estimate Summary
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SUMMARY OF THE STUDY
The study represents an updating of a previous evaluationperformed in 2002 and is based on the following requirements:
Malta shore approach at Delimara,
Export pressure = 54 barg
Minimum delivery pressure = 39 barg,
Flowrate scenario:
Max Peak = 106570 Sm3 /h
The hydraulic study performed according to the same approachadopted in 2002 leads to the definition of the following pipelinediameter
OD = 18”
The expected accuracy of the estimate is ± 20%
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Basic Data
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Gas Composition and Characteristics
Equation of State = PR Peneloux
Gas Composition
Component Mol%
Methane 86.7854
Ethane 6.2315
Propane 1.4872
i-Butane 0.2707
n-Butane 0.4140
i-Pentane 0.1305
n-Pentane 0.1080
Exane 0.0375
Eptane 0.0053
Nitrogen 4.1520
Carbon Dioxide 0.3711
Water 0.0068
Total 100.0000
Gas Characteristic
@ STD Conditions: 1.013bar, 15°C
Value
Gas Molecular Weight (kg/kmol) 18.39
Gas Density (kg/m3) 0.779
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Malta Required Flowrate
0
20
40
60
80
100
120
140
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
1 0 3 x
S C M / h
Hour
Mid-season week day Mid-season Weekend day Summer Week day
Summer Weekend day Winter Week day Winter Weekend day
Peak day
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Pipeline Data
Pipeline characteristics
Pipe Material Steel Grade API 5L-X65
SMYS 450 MPa
SMTS 535 MPa
Steel Density 7850 kg/m3
Young Modulus 207000 MPa
Poisson Ratio 0.3
Coefficient Of thermal Expansion 1.16 x 10-5 °C-1
Sea Water Density 1026 kg/m3
Concrete Density 3040 kg/m3
Corrosion Coating Density 1300 kg/m3
Corrosion Coating Thickness 2.5 mm
Corrosion Allowance 0 mm
Out of roundness1.5% OD
but maximum 15 mm
Thickness tolerance±0.75 mm for t ≤ 15 mm
±1.00 mm for t > 15 mm
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Soil Data
KP KPSOIL GELA-MALTA
Dr Su D50
From To kN/m3 Deg. % kN/m
2 mm
0 4.4
Fine SAND with occasion Shell becoming medium
toward coast 9 44 85-100 --
0.09-0.16 0.7
(max.)
4.4 7.9Silty Fine SAND with Occasional Shell. PossiblePresence of clayey SAND.
9 32 35-65 -- 0.07-0.1
7.9 10.2 Very Soft Silty CLAY with Occasional Shell 7.5 -- -- 2 0.009-0.013
10.2 21.2 Very Soft Silty CLAY 4.5-5.5 -- -- 2-4 <0.002
21.2 36Very Soft Silty/Sandy CLAY. Occasional presenceof Shell Fragments.
7 -- -- 8-10 0.01-0.03
36 51Very Soft Silty CLAY. Occasionally some intrusionsof sandy CLAY,
5.5* -- -- 6* 0.003
51 95Very Soft Sandy CLAY, containing some shellfragments
8.0* -- -- 8-15* 0.01-0.04
95 115Very Soft Silty/Sandy CLAY at top, changing infine SAND in depth.
4.0*
1-2*
<0.002
8.5* 40* 50-65* <0.074
115 136Fine to Medium SAND with Occasional Shells.Possible intercalation of Clay and Silt.
8.5*36-44*
60-100*
-- 0.06-0.2*
136 145Fine SAND with high content of Shells,concretions and corals.
9.0*40-44*
80-100*
--0.09-0.16 0.7
(max.)*
145 148Fine to Medium SAND with high content ofshells/corals fragment.
8.5*36-44*
60-100*
-- 0.06-0.2*
148 LTE Gravely SAND. High Probability of Rock Outcrops. 7.0-8.5*30-36*
35-65* -- 0.1-0.9*
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Hydraulic Analysis - Inlet and Delivery Gas Conditions
Gas Condition Value
Inlet Gas Pressure (barg) 54
Inlet Gas Temperature (°C) 18
Delivery Gas Pressure (barg) ≥39
Delivery Gas Temperature (°C) As per result of the hydraulic simulations,
in peak day conditions
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Hydraulic Analysis – Data Input
Pipe and Soil data:
Steel grade: X65
Pipe internal roughness: 25 micronsCorrosion Coating Thickness: 2.5 mm.
Pipeline MaterialThermal Conductivity
W/m K
Steel 50
Corrosion Coating (PE) 0.3
Overweight Concrete 2.33
Soil Thermal Conductivity
W/m K
Wet Sand 2
Dry Sand at Gela 1
Dry Sand at Malta 1.5
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Hydraulic Analysis – Data Input
Pipeline Burial Configuration:
The pipeline is assumed buried in the onshore sections and in the coastalareas (i.e. for WD<30m at Gela side and for WD<35-40m at Malta side).The pipeline is considered unburied in the deep water.
Pipeline Burial Depth(from the pipeline top)
m
Onshore Sections 1.5
Offshore Sections 1
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Results
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Scenario 16” OD Pipeline Gela – Malta (Delimara):Process Analyses Results
Scenario A - 16" ND Pipeline
- Pressure Trends-
30
32
34
36
38
40
42
44
46
48
50
52
54
56
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Time [h]
P r e s s u r e [ b a r g ]
Pressure Supply at Gela Terminal (P/L Inlet)
Pressure Delivery at Delimara Terminal (P/L Outlet)
Minimum Delivery
Scenario A - 16" ND Pipeline
- Flow Rates Trends-
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23Time [h]
F l o w R a t e [ S c m / h ]
Gas Supply at Gela Terminal (P/L Inlet)
Gas Delivery at Delimara Terminal (P/L Outlet)
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Scenario 18” OD Pipeline Gela – Malta (Delimara):Process Analyses Results
Scenario A - 18" ND Pipeline
- Flow Rates Trends-
0
20,000
40,000
60,000
80,000
100,000
120,000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23Time [h]
F l o w R a t e [ S c m / h ]
Gas Supply at Gela Terminal (P/L Inlet)
Gas Delivery at Delimara Terminal (P/L Outlet)
Scenario A - 18" ND Pipeline
- Pressure Trends-
30
32
34
36
38
40
42
44
46
48
50
52
54
56
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Time [h]
P r e s s u r e [ b a r g ]
Pressure Supply at Gela Terminal (P/L Inlet)
Pressure Delivery at Delimara Terminal (P/L Outlet)
Minimum Delivery
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Scenario 18” OD Pipeline Gela – Malta (Delimara):Wall Thickness Analyses Results
Gela - Malta (Delimara) - OD=18" - Pd=75 bar
WT=10.3
WT=15.9
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
0 20000 40000 60000 80000 100000 120000 140000
KP (m)
W a t e r D e p t h ( m )
0
2
4
6
8
10
12
14
16
18
20
W a l l T h i c k n e s s ( m m )
WD (m) Min WT (mm) Selected WT (mm)
Min Buckle Arrestors Thickness (mm) Selected Buckle Arrestors Thickness (mm) Min Prop Buckl
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Scenario 18” OD Pipeline Gela – Malta (Delimara):On Bottom Stability and Layability Analyses Results
Gela - Malta (Delimara) - OD = 18" - Pd=75 bar
CCT= 90.0
CCT= 60.0
CCT= 40.0
CCT= 60.0
CCT= 90.0
-200
-150
-100
-50
0
50
0 20000 40000 60000 80000 100000 120000 140000
KP (m)
W a t e r D e p t h ( m )
0
10
20
30
40
50
60
70
80
90
100
C o n c r e t e C o a t i n g
T h i c k n e s s ( m m )
WD (m) Selected CCT (mm)
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Budgetary
Estimates
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Budgetary Estimates - CAPEX
CAPITAL COSTS
Scenario
OD = 18"
Lenght (km) 154.0
Steel Weight (Kton) 17.763
Inch 18
Management and Design Meuro 15
Materials Meuro 53
Construction Meuro 138
TOTAL Meuro 206
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Budgetary Estimates - OPEX
OPERATING COST
Scenario
OD = 18"
Periodical cost for Pipelines and Shore approaches Surveys(Every two year operations)
Meuro 2.2
Periodical cost for Internal Line Inspection(Every seven years operations)
Meuro 1.4
TOTAL per year Meuro/year 1.3
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The budgetary cost estimate has been evaluated in Euro on the basis of in house data
bank. Particularly, the following cost for procurement of steel pipeline have been considered:
Budgetary Estimates Notes
2,000 Euro/ton
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Main exclusions from the budgetary estimate:
• Capital taxes, import duties and levies
• Owner costs, taxes, etc.
• Paid interests and/or financial charges
• Financial arrangements, bonds, guarantees, cash flow burning and similar
• Taxes, duties, fees, VAT, etc. of any nature
• Costs associated with the Builder All Risk (BAR), Third Party Liability (TPL) or other
related Project Insurances including Insurances during the operation period
• Land acquisition and Right of Way
• All permits and licences including special Project environmental protection
arrangements
• Certification
• Any extraordinary intervention on pipelines and plants.
• Weather Down-Time or Weather Stand-By
Budgetary Estimates Exclusions