Classification: Internal
NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT
COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT
COMPANY Contract No.: LTC/C/NFP/5129/20 CONTRACTOR Project No.: 033764
ASSET
: NFPS
Document Title
:
PROJECT BASIS OF DESIGN FOR COMP3 PROJECT
COMPANY Document No.
:
200-20-PE-DEC-00004
CONTRACTOR Document No.
:
033764-B-D-18-SPM-EM-S-00001
Discipline
:
ADMINISTRATIVE, ENGINEERING MANAGEMENT
Document Type
: DESIGN CRITERIA
Document Category/Class
:
1
Document Classification
:
Internal
A
04-FEB-2025
Issued for Review
Jobi George Anirudh Nadiger Reetesh Jha
Tech. Manager Tech. Manager Eng. Manager
REV.
DATE
DESCRIPTION OF REVISION
PREPARED BY
REVIEWED BY
APPROVED BY
Saipem S.p.A
THIS DOCUMENT IS PROPERTY OF QatarEnergy LNG. THIS DRAWING OR MATERIAL DESCRIBED THEREON MAY NOT BE COPIED OR DISCLOSED IN ANY FORM OR MEDIUM TO THIRD PARTIES, OR USED FOR OTHER THAN THE PURPOSE FOR WHICH IT HAS BEEN PROVIDED, IN WHOLE OR IN PART IN ANY MANNER EXCEPT AS EXPRESSLY PERMITTED BY QatarEnergy LNG.
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NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT
COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT
PROJECT BASIS OF DESIGN FOR COMP3
REVISION HISTORY
Revision
Date
Revision Description
A1
A
01-NOV-2024
Issued for Inter Disciplinary Check
04-FEB-2025
Issued for Review
HOLDS LIST
Hold No
Hold Description
1
2
3
4
5
Deleted
Section 5.1: Platform coordinates to be confirmed
Section 5.3.2: Water depth of brownfield platforms to be confirmed
Section 8.14: Splash zone data of brownfield platforms to be confirmed
Section 8.16: Subsidence data of brownfield platforms to be confirmed
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NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT
COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT
PROJECT BASIS OF DESIGN FOR COMP3
TABLE OF CONTENTS
INTRODUCTION … 4 1.1. PROJECT OBJECTIVE … 4 1.2. PROJECT SCOPE … 4 2. DEFINITIONS AND ABBREVIATIONS … 7 2.1. DEFINITIONS … 7 2.2. ABBREVIATIONS … 7 3. REFERENCE DOCUMENTS, RULES, CODES AND STANDARDS … 8 3.1. COMPANY REFERENCES … 8 3.2. PROJECT DOCUMENTS … 11 3.3. STANDARDS … 11 4. SCOPE AND PURPOSE … 12 5. FACILITIES DESCRIPTION AND BASIS … 12 5.1. PROJECT LOCATION AND ORIENTATION … 18 5.2. CO-ORDINATE SYSTEMS … 19 5.3. WATER DEPTHS … 19 5.3.1. Greenfield … 19 5.3.2. Brownfield … 20 5.4. DESIGN LIFE … 21 5.4.1. Equipment Design Life… 21 5.4.2. Structure Design Life – Jackets, Topsides and Piles … 21 5.5. RELY UPON DATA … 21 6. ORDER OF PRECEDENCE … 21 7. UNITS OF MEASUREMENT … 22 8. ENVIRONMENTAL DATA … 24 8.1. GENERAL … 24 8.2. AMBIENT TEMPERATURE AND PRESSURE … 24 8.3. SOLAR RADIATION … 24 8.4. RELATIVE HUMIDITY … 24 8.5. WIND SPEED… 25 8.6. RAINFALL INTENSITY… 25 8.7. SEAWATER PROPERTIES … 25 8.8. SEA CURRENT DATA … 26 8.9. TIDE DATA … 26 8.10. EXTREME SEAWATER LEVEL … 26 8.11. WAVE DATA … 27 8.12. FATIGUE WAVE DATA … 27 8.13. SEISMIC DATA - OFFSHORE … 27 8.14. SPLASH ZONE … 27 8.15. MARINE GROWTH … 29 8.16. SUBSIDENCE … 29 8.17. GEOTECHNICAL DATA … 29 9. DISCIPLINE DESIGN BASIS … 29
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NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT
COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT
PROJECT BASIS OF DESIGN FOR COMP3
- INTRODUCTION
The North Field is the world’s largest natural gas field and accounts for nearly all the State of Qatar’s gas production. The principal objective of the NFPS projects is to sustain plateau from existing QatarEnergy LNG Operation – S1, S2, S3, N1 and N2, production areas by implementing an integrated and optimum investment program consisting of subsurface development, pressure drop reduction steps and compression.
NFPS projects comprise 3 main investment programs:
- Investment #1: Drilling and Associated Facilities [WHP12S/ WHP13S/ WHP14S/
WHP12N/ WHP13N]
- Investment #2: Trunk line Looping and Intra-field pipeline looping [32” PL1LN, 32”
PL1LS, 38”PL610LS]
- Investment #3: Compression Complexes and associated facilities [Phase 1 CP6S & CP7S; Phase 2: CP8S & CP4N; Phase 3: CP4S & CP6N Phase 4: CP1S & CP1N]
Drilling and Looping, Investments #1 and #2, projects are in execution phase and are being executed as I1P1, EPCOL Projects except for WHP13N, which will be part of NFPS Compression Projects execution which compromises total up to 9 COMPs.
1.1. Project Objective
The objective of this Project includes:
• Achieve standards of global excellence in Safety, Health, Environment, Security and
Quality performance.
• Sustain the Qatarenergy LNG North Field Production Plateau by installing new RPs and one WHPs to support new Compression Complex facilities CP6S & CP7S and pre-installed facilities for future Compression Complex facilities including but not limited to CP4N & CP8S tie-in with integration to the existing facilities under Investment #3 program.
• Facility development shall be safe, high quality, reliable, maintainable, accessible,
operable, and efficient throughout their required life.
1.2. Project Scope
The Project Scope includes detailed engineering, procurement, construction, brownfield modifications, transportation & installation, hook-up and commissioning, tie-in to EXISTING PROPERTY and provide support for start-up activities of the following facilities and provisions for future development. The WORK shall be following the specified regulations, codes, specifications and standards, achieves the specified performance, and is safe and fit purpose in all respects.
for
‐
‐
Facilities - 1A
• RP5S RP with 2 x 28” CRA clad pipelines to RP7S and 2 subsea composite Cables and
associated J tubes from RP7S to RP5S & from CP7S to WHP13S.
• New Fuel Gas 8” CRA Spur-lines and flanged risers from Subsea skid to RP7S
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NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT
COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT
PROJECT BASIS OF DESIGN FOR COMP3
• Hook-up and brownfield modification at WHP5S/RP5S bridge connection & WHP13S/CP7S Composite cable tie-in and E&I integration including RGA Control modification
• Pipeline decommissioning of 28” CS PL5 including associated demolition work at
WHP5S
Facilities - 2A
• RP6N RP with 1x28” CRA clad pipeline to WHP13N, 2 Subsea composite cables and
associated J tubes from WHP12N to RP4N and RP6N to WHP13N. • New fuel gas spur-line and flanged riser from subsea skid to RP6N • WHP13N Topside • Hook-up and brownfield modification at WHP6N/RP6N, RP4N- HPU-Umbilical and tie- in, WHP12N-new J tube installation, E&I migration, WHP6N/RP4N/WHP4N-E&I migration (Pre-CP4N), WHP13N and RP6N interconnection to NFB.
Facilities - 3A
• RP9S RP with 1x28” CRA clad pipeline to RP4S, • Hook-up and brownfield modification at RP4S/WHP9S, Modifications to integrate RP9S
to the RGA control network.
• Pipeline decommissioning of 28” PL9 to WYE on existing 38” trunkline PL49including
associated demolition work at WHP9S.
Facilities - 1B
• New fuel gas spur-line and flanged riser from subsea skid to RP4N • Fiber Optic Cable from RP6N to onshore LFP East, RP6N to RP4N and RP6N to LQ6S. • Hook-up and brownfield modification at RP6N Composite and FO Tie-ins NFB-PU (East)- FO Tie-in
(East)/BVS
Power & Control modifications, LQ6S/LFP Controls/Telecoms Integration
Facilities - 2B
• RP5N RP with 2 x 28” CRA clad pipelines to RP4N, 1 x 28” CRA clad pipeline to RP6N and 2 subsea composite Cables and associated J tubes from WHP12N to RP5N & from RP6N to RP5N.
• Hook-up and brownfield modification at WHP5N- RP5N Bridge connection, WHP12N Composite cable tie-in, RP4N Intrafield pipeline Hook up PL54 N/LN and E&I integration including NFB-PU Power & Control modifications
• Pipeline decommissioning of 2 x 16” PL56/PL54 Subsea Spur line from WHP5N to
reducing barred tee in subsea tie-in skid on PL6 / PL4.
Facilities - 3B
• 2 subsea composite Cables from RP4S to RP9S & from RP4S to WHP12S (with J-tube) • New Fuel Gas 8” CRA Spur-lines and flanged risers from Subsea skid to RP4S • Hook-up and brownfield modification at WHP12S/ RP9S/ RP4S Composite cable tie-in,
Spurline riser installation at RP4S RGA Power & Control modifications.
Facilities - 4B
• 1 subsea composite Cable from CP8S to RP11S (or from RP8S to RP11S as Option). • New Fuel Gas 8” CRA Spur-line and flanged riser from Subsea skid to RP8S.
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PROJECT BASIS OF DESIGN FOR COMP3
• Hook-up and brownfield modification at WHP8S/ WHP11S for Test separator Internal Upgrade and MEG system modification, Spur lines, Power & Control Tie-ins on RP8S, RP11S/WHP11S-Tie-in (Power and Control), RGA Power & Control modifications.
Facilities - 5B
• 2 subsea composite Cables from RT2 to WHP3S & from RT2 to WHP2S (with J-tube)
and FO Cable from RT2 to Barzan WHP1.
• New Fuel Gas 8” CRA Spur-line and flanged riser from Subsea skid to RT2 • Hook-up and brownfield modification at BRZ-WHP1 - FO cable tie-in, WHP2S/ WHP3S/ RT&RT2 Composite cable tie-in and associated modification, RGA Power & Control modifications.
Facilities - 6B
• RP3S RP with 1x24” CRA clad pipeline to RT2 with Stalk on risers, • Hook-up and brownfield modification at RT2
Intrafield pipeline and Composite/FO cable Hook-up, WHP3S for Production diversion and Utilities, Power and ICSS Hook-up, WHP2S for Composite Cable Tie-ins and Power & Control Integration RGA Power & Control modifications.
for 24”
• Decommissioning at
In-situ abandonment of existing Topside/subsea Composite Cables RT-WHP2S, RT-WHP3S, Topside/Subsea FO cable RT-BRXWHP1.
topside existing and
Figure 1.2.1: NFPS Compression Project COMP3 Scope
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COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT
PROJECT BASIS OF DESIGN FOR COMP3
- DEFINITIONS AND ABBREVIATIONS
2.1. Definitions
Definition
Description
COMPANY
QatarEnergy LNG.
CONTRACTOR
Saipem S.p.A.
DELIVERABLES
FACILITIES
MILESTONE
PROJECT
SITE
SUBCONTRACT
SUBCONTRACTOR
All products (drawings, equipment, services) which must be submitted by CONTRACTOR to COMPANY at times specified in the contract. All machinery, apparatus, materials, articles, components, systems and items of all kinds to be designed, engineered, procured, manufactured, constructed, supplied, fabricated, tested and permanently installed by CONTRACTOR at SITE in connection with the NFPS Project as further described in Exhibit 6. A reference event splitting a PROJECT activity for progress measurement purpose. COMP3 - NFPS Offshore Riser/Wellhead Platform & Intrafield Pipelines Project (i) any area where Engineering, Procurement, Fabrication of the FACILITIES are being carried out and (ii) the area offshore required for installation of the FACILITIES in the State of Qatar Contract signed by SUBCONTRACTOR and CONTRACTOR for the performance of a certain portion of the WORK within the Project. Any organization selected and awarded by CONTRACTOR to supply a certain Project materials or equipment or whom a part of the WORK has been Subcontracted.
WORK
Refer to article 2 of CONTRACT AGREEMENT.
WORK PACKAGE
The lowest manageable and convenient level in each WBS subdivision.
2.2. Abbreviations
Code
PMT DCS DLE ESD HAT LAT SLE
Definition
Project Management Team Distributed Control System Ductility Level Earthquake Emergency Shutdown System Highest Astronomical Tide Lowest Astronomical Tide Strength Level Earthquake
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NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT
COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT
PROJECT BASIS OF DESIGN FOR COMP3
- REFERENCE DOCUMENTS, RULES, CODES AND STANDARDS
3.1. COMPANY References
S. No Document Number
Title
LTC/C/NFP/5129/20
Contract Agreement
Exhibit 6A & 6B
Scope of Work
OMQ011 (181571_2_Part 2)
158164_REP02_FME_PSHA_ QATAR_GAZ_2020
413040-00200-EIA-001
Updated Metocean Criteria Offshore Qatar, Rev 3, 19 February 2019 Seismic Hazard Assessment for the North Field Production Sustainability (NFPS) Project (Qatar), Rev 04, 7 October 2020 NFPS Compression Project - Environmental Impact Assessment Report, Rev 3, 30 May 2022 Ras Laffan Environmental Data Summary, Rev. 5, Jan 2000
Geotechnical and Geophysical Survey Reports – Platforms
MRQ025-V02c-SR-RT5 (Rev.1)
MRQ025-V02d-SR-RT9
MRQ025-V02i-SR-RPQD6 (Rev.2)
GIQ345/218
GIQ345/213
GIQ345/214
GIQ403/145
GIQ403/142
GIQ403/242
GIQ403/243
Geophysical Survey Report Proposed Platform Location - RT5 (RGWHP5) 6 and 7 October 2018_ Issued as Final Geophysical Survey Report - Proposed Platform Location
- RT9 (RGWHP9), Rev 1, 10 October 2018 Geophysical Survey Report Proposed Platform Location - RPQD6 (WHPQ6) OLD & RPQD6_REV1_ 2 October 2018_ Issued as Final Final Engineering Report - Provision of Underwater Inspection & Geotechnical / Geophysical Survey Services
- RT9, Rev 1, 18 February 2019 Final Engineering Report - Provision of Underwater Inspection & Geotechnical / Geophysical Survey Services
- RT5, Rev 1, 17 February 2019 Final Engineering Report - Provision 0f Underwater Inspection & Geotechnical/Geophysical Survey Services - RT5-BS, Rev 1, 17 February 2019 Geotechnical Field Report - Geotechnical Survey - Offshore Platform Structures (Compression Phase 2) - WHP13N Wellhead Platform, Rev 1, 20 September 2020 Geotechnical Field Report - Geotechnical Survey - Offshore Platform Structures (Compression Phase 2) - QG2 CP6N (RP6N) Riser Platform, Rev 1, 10 August 2020 Final Engineering Report - Geotechnical Survey - Offshore Platform Structures (Compression Phase 2) - QG2 CP6N (RP6N) Riser Platform, Rev 1, 26 September 2020 Final Engineering Report - Geotechnical Survey - Offshore Platform Structures (Compression Phase 2) - RP5N Riser Platform, Rev 1, 23 October 2020
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PROJECT BASIS OF DESIGN FOR COMP3
S. No Document Number
Title Final Engineering Report - Provision of Underwater Inspection & Geotechnical/Geophysical Survey Services – RT-51, Rev 1, 18 February 2019 Geotechnical and Geophysical Survey Reports – Pipelines and Cables
GIQ345/219
MRQ025-V03a-SR-28 RT11 to RT8-OPT1
MRQ025-V03b-SR-28 RT11 to RT8-OPT2
MRQ025-V05b-SR-28in
RGWHP13 to RT7
MRQ025-V05e-SR-28in
RGWHP14 to RT6
MRQ025-V05f-SR-28in WHPQ12 to RPQD4
MRQ025-V05g-SR-28″ WHPQ13 to RPQD6
MRQ025-V05h-SR-24in RT-
51 to RT-52
MRQ025-V05i-SR-28in RT5
to RT7
MRQ025-V05j-SR-28in RT5
to RT7
MRQ025-V05k-SR-28in RT9
to RT4
MRQ025-V05l-SR-28in RT9
to RT4
MRQ029/101
MRQ029/202
MRQ046/101
Geophysical Survey Report 2 x 28″ CRA Clad Intrafield Pipelines from RT-11 to RT-8 (Option 1), Rev 1, 1 October 2019 Geophysical Survey Report 2 x 28″ CRA Clad Intrafield Pipeline from RT-11 to RT-8 (Option 2), Rev 1, 1 October 2019 Geophysical Survey Report Proposed 28″ CRA Clad Intrafield Pipeline from RGWHP13 to RT7 at RGWHP7 (Base Case), Rev 1, 3 March 2019 Geophysical Survey Report Proposed 28 inch CRA Clad Intrafield Pipeline from RGWHP14 to RT6 at RGWHP6, Rev 1, 3 March 2019 Geophysical Survey Report Proposed 28″ CRA Clad Intrafield Pipeline from WHPQ12 to RPQD4 at WHPQ4, Rev 1, 3 March 2019 Geophysical Survey Report - Proposed 28″ CRA Clad Intrafield Pipeline from WHPQ13 to RPQD6 at WHPQ6, Rev 1, 3 March 2019 Geophysical Survey Report Proposed 24″ CRA Clad Intrafield Pipeline from RT-51 at RGWHP3 to RT-52 at RGA, Rev 1, 3 March 2019 Geophysical Survey Report Proposed 28″ CRA Clad Intrafield Pipeline from RT5 at RGWHP5 to RT7 at RGWHP7 (Pipeline-1), Rev. 1, 3 March 2019 Geophysical Survey Report Proposed 28″ CRA Clad Intrafield Pipeline from RT5 at RGWHP5 to RT7 at RGWHP7 (Pipeline-2), Rev. 1 , 3 March 2019 Geophysical Survey Report Proposed 28″ CRA Clad Intrafield Pipeline-1 from RT9 at RGWHP9 to RT4 at RGWHP4, Rev 1, 3 March 2019 Geophysical Survey Report Proposed 28″ CRA Clad Intrafield Pipeline-2 from RT9 at RGWHP9 to RT4 at RGWHP4, Rev. 1, 3 March 2019 Geotechnical Factual Report - Pipeline Geotechnical Survey North Field Sustainability Project, Rev 2, 5 May 2019 Consultancy Report - North Field Production Sustainability Project: Pipeline-Seabed Interaction Assessment, Rev 1, 24 April 2019 Geotechnical Factual Report - Geophysical and Geotechnical Offshore Surveys for Pipeline/Cable Routes (Compression Phase), Rev 2, 14 October 2020
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COMP3 - NFPS OFFSHORE RISER/WELLHEAD PLATFORM & INTRAFIELD PIPELINES PROJECT
PROJECT BASIS OF DESIGN FOR COMP3
S. No Document Number
MRQ046-V01-SR-TO
MRQ046-V02a-SR-32in FG PL-LFP (EC) to RP6S MRQ046-V02b-SR-32in FG PL-LFP (WC) to RP6S MRQ046-V03b-SR-28in PL- RP5N to RP4N MRQ046-V03c-SR-28in PL- RP5N to RP6N MRQ046-V04b-SR-Cable CP1S to WHP2S MRQ046-V04c-SR-Cable CP4S to WHP12S MRQ046-V04d-SR-Cable WHP12N to RP5N MRQ046-V04e-SR-Cable BRZ WHP-1 to RT2 MRQ046-V04f-SR-Cable RP6N to LQ6S MRQ046-V05a-SR-8in FG Spurline to RT2 (CS1) MRQ046-V05b-SR-8in FG Spurline to RP4S (CS4) MRQ046-V05c-SR-8″ FG Spurline to RP7S (CS7) MRQ046-V05d-SR-8in FG Spurline to RP8S (CS8) MRQ046-V05f-SR-8in FG Spurline to RP4N (CS4N) MRQ046-V05g-SR-8″ FG Spurline to RP6N (CS6N)
Title Technical and Operations Report - Geophysical and Geotechnical Offshore Survey for Pipelines/Cables (Compression Phase) – North Field Production Sustainability, Rev 1, 20 October 2020 Geophysical Survey Report - 32″ Fuel Gas Pipeline from LFP (East Corridor) to RP6S, Rev. 1 , 20 October 2020 Geophysical Survey Report - 32″ Fuel Gas Pipeline from LFP (West Corridor) to RP6S, Rev. 1, 20 October 2020 Geophysical Survey Report - 28″ Intrafield Pipeline RP5N to RP4N, Rev. 1 , 20 October 2020 Geophysical Survey Report - 28″ Intrafield Pipeline RP5N to RP6N (Base Case), Rev. 1 , 20 October 2020 Geophysical Survey Report - Composite Cable CP1S to WHP2S, Rev. 1 , 20 October 2020 Geophysical Survey Report - Composite Cable CP4S to WHP12S, Rev. 1 , 20 October 2020 Geophysical Survey Report - Composite Cable WHP12N to RP5N, Rev. 1 , 20 October 2020 Geophysical Survey Report - Fibre Optic Cable BRZ WHP-1 to RT2, Rev. 1 , 20 October 2020 Geophysical Survey Report - Fibre Optic Cable RP6N to LQ6S, Rev. 1 , 20 October 2020 Geophysical Survey Report - 8” Fuel Gas Spurline to RT2 (CS1), Rev. 1 , 20 October 2020 Geophysical Survey Report - 8” Fuel Gas Spurline to RP4S (CS4), Rev. 1, 20 October 2020 Geophysical Survey Report - 8″ Fuel Gas Spurline to RP7S (CS7), Rev 1, 20 October 2020 Geophysical Survey Report - 8″ Fuel Gas Spurline to RP8S (CS8), Rev. 1, 20 October 2020 Geophysical Survey Report - 8″ Fuel Gas Spurline to RP4N (CS4N), Rev. 1, 20 October 2020 Geophysical Survey Report - 8″ Fuel Gas Spurline to RP6N (CS6N), Rev 1, 20 October 2020
Note: Platform Nomenclature used in Survey Reports:
COMP3 Facilities Designation WHP13N RP3S RP5S BSP5S-1 RP9S RP5N RP6N
Platform Name in Geotechnical and Geophysical Reports WHP13N, WHPQ13 RT-51 RT5 RT5-BS RT9 RP5N RP6N, RPQD6
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PROJECT BASIS OF DESIGN FOR COMP3
3.2. Project Documents
S. No Document Number
Title
200-20-PR-DEC-00051
RGE Process Design Basis for COMP3 Project
200-20-PR-DEC-00052
QG2 Process Design Basis for COMP3 Project
200-20-PR-DEC-00053
RGA Process Design Basis for COMP3 Project
200-20-SH-DEC-00013
Technical Safety Basis of Design for COMP3 Project
200-20-SH-DEC-00014
Environmental Basis of Design for COMP3 Project
200-91-EL-DEC-00008
Electrical Design Basis for COMP3 Project
200-20-ME-DEC-00009
Mechanical Design Basis for COMP3 Project
200-42-HV-DEC-00004
200-51-IN-DEC-00011
200-52-TC-DEC-00005
HVAC Design Basis - Offshore for COMP3 Project Instrument and Control Systems Design Basis for COMP3 Project Telecommunication Design Basis for COMP3 Project
200-20-PI-DEC-00009
Basis of Design for Piping for COMP3 Project
200-20-PI-DEC-00010
Piping and Layout Design Basis for COMP3 Project
200-20-PI-DEC-00011
200-22-ST-DEC-00004
200-21-ST-DEC-00003
200-20-ST-DEC-00007
200-20-PL-DEC-00005
Piping Stress Analysis Design Basis for COMP3 Project Topsides Structural Design Basis (Greenfield) for COMP3 Project Substructure Design Basis (Greenfield) for COMP3 Project Brownfield Structural Design Basis Offshore for COMP3 Project Metocean Basis of Design for COMP3 Project
200-25-PL-DEC-00007
Pipeline and Riser Basis of Design for COMP3 Project
200-20-PL-DEC-00007
200-25-PL-DEC-00008
702-25-PL-DEC-00003
200-20-PL-DEC-00006
Cable and Umbilical Basis of Design for COMP3 Project Flow Assurance Basis of Design for Intrafield Lines and Trunklines for COMP3 Project Flow Assurance Basis of Design for Spurlines for COMP3 Project Offshore Geophysical and Geotechnical Basis of Design for COMP3 Project
COMP3-SPM-PE-PRC-00003 Document Numbering Procedure COMP3-SPM-IM-PRC-00001 Document Control Procedure COMP3-SPM-PL-TQY-00006 Technical Query for Metocean Data For Pipeline Design
3.3. Standards
S. No Document Number
Title
N/A
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PROJECT BASIS OF DESIGN FOR COMP3
- SCOPE AND PURPOSE
Purpose of this document is to define the overall design basis of the facilities under COMP3 Project
- FACILITIES DESCRIPTION AND BASIS
Compression 3 comprises of 3A and 3B scopes as described in Table 5.1 and 5.2 below:
Table 5.1: Summary of FACILITIES Scope for COMP 3A
Item
FACILITIES-1A
COMP3A Offshore Facility Description RP5S Riser Platform, Intra field pipelines / Subsea Cables (Linkage with RP7S) and Brownfield Modifications: Spur Line:
• 8” CRA Clad FG Spur line from Subsea Skid to RP7S topsides.
(Approx. 0.5 km)
Intra field Pipelines:
• 28” CRA Clad Intra-field Pipelines PL5S, from RP5S to RP7S
(Approx. 9.2 km) + Stalk on risers at RP5S and RP7S respectively
• 28” CRA Clad Intra-field Pipelines, PL5LS, from RP5S to RP7S
(Approx. 8.9 km) + Stalk on risers at RP5S and RP7S respectively
Riser Platform RP5S:
• Topsides, Jacket and Bridges (BR5S-1, BR5S-2) • Bridge Support Platform BSP5S-1 between WHP5S and RP 5S
Hook up and Brownfield Modifications:
• WHP5S - RP5S Bridge connection/hook up/protection structure. • RP7S Spur line tie-in • WHP13S Composite Cable tie-in and E&I Integration
Brownfield RGA Controls
• RGA to RP5S through WHP5S (Pre-CP7S Installation)
Pipeline Decommissioning:
• Decommission 28” CS pipeline PL5 from WHP5 to WYE on existing
38” trunkline PL75.
• Decommission and demolition of WHP5S topside pig launcher and
associated systems post pipeline PL5 decommissioning.
Composite Cables and J-Tubes:
• Composite Cable from RP7S to RP5S (Approx. 9.2 km) • Composite Cable from CP7S to WHP13S (Approx. 11.0 km) • One (1) post installed J-Tube on WHP13S
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PROJECT BASIS OF DESIGN FOR COMP3
Item
COMP3A Offshore Facility Description WHP13N Wellhead Platform and RP6N Riser Platform with bridge link to WHP6N, Intra Filed Pipelines, Subsea Cables and Brownfield Works: Subsea Skid Umbilical:
• RP6N to Fuel Gas Subsea Skid (Approx. 0.5 km)
Intra field Pipelines:
• 28” CRA Clad Intra-field Pipelines PL13N, from WHP13N to RP6N
(Approx. 7.0 km) + Stalk on risers at WHP13N and RP6N respectively
Riser Platform RP6N:
• Topsides, Jacket and Bridges (BR6N-1)
Well Head Platform WHP13N: • WHP13N Topside
Spur Line:
FACILITIES-2A
Composite Cables and J-Tubes:
• 8” CRA Clad Flanged Riser for FG Spur line
• Composite Cable from WHP12N to RP4N (Approx. 12.3 km) • Composite Cable from RP6N to WHP13N (Approx. 7 km) • One (1) post installed J-Tube on WHP12N
Hook up and Brownfield Modifications:
• WHP6N- RP6N Bridge connection/hook up/protection structure and
helideck decommissioning.
• RP4N - HPU-Umbilical and tie-ins (Power & Control) • WHP12N - New J-tube installation, Composite Cable installation &
tie-in, E & I migrations
• WHP6N/ RP4N/WHP4N-E & I Migrations (Pre-CP4N)
Brownfield NFB Controls:
• WHP13N and RP6N Interconnection to NFB. • WHP4N controls from NFB through NFB-WHP12N connectivity
RP9S Riser Platform with bridge link to WHP9S Intra Filed Pipelines, Subsea Cables and Brownfield Works: Riser platform RP9S:
• Topside, Jackets and Bridge BR9S-1
Intra field Pipelines:
• 1X28” CRA Clad Intra-field Pipeline and stalk on risers, PL9S, from
RP9S to RP4S (Approx. 9.9 km)
Brownfield Modifications: RP4S Brownfield Modifications
• Hook up of the intra-field pipelines at RP4S. • Structural modifications WHP9S Brownfield Modifications
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Item
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PROJECT BASIS OF DESIGN FOR COMP3
COMP3A Offshore Facility Description • Topsides and Jacket Modification • Hook-up between WHP 9S and RP 9S • Production diversion from wellhead to RP9S • Supply of utilities including MEG from WHP9S to RP9S. • Topsides, Pig-launcher and associated piping
decommissioning/demolition.
RGA Brownfield
•
Modifications to integrate RP9S to the RGA control network.
Pipeline Decommissioning:
• Decommission 28” CS pipeline PL9 from WHP9S to WYE on existing 38” trunkline PL49, including launcher and receiver on WHP9S.
Table 5.2: Summary of FACILITIES Scope for COMP 3B
Item
FACILITIES-1B
COMP3B Offshore Facility Description Pipeline / Subsea cables and Brownfield works support for CP6N & CP4N Complex: Spur line:
• 1 new 8” Fuel Gas Spur line installed, fully tested andpreserved from Subsea skid (Approx. 0.5 km) to Platform RP4N topsides, including the associated brownfield and hook up work.
Fiber Optic (FO) Cable:
• RP6N to onshore LFP East including Onshore LFP East to Fiber
Interface Box (FIB) at BVS East (Approx. Length 91.5 km)
• RP6N to RP4N (Approx. Length 20.6 km) • RP6N to LQ6S (Approx. Length 15.4 km)
Brownfield Modifications:
• Riser Platform (RP) RP6N - Composite and FO Tie-ins. • NFB-PU Power & Control modifications
Brownfield Works at LFP (BVS East)
• LQ6S/LFP (East)/BVS (East)- FO Tie-in Controls/Telecoms
Integration
RP5N FACILITIES Riser Platform with bridge link to WHP5N, Intra field Pipelines/Subsea cables and Brownfield Work: New Riser Platform RP 5N:
FACILITIES-2B
Hook up and Integration:
• ➢ Top side, Jacket and Bridge
• ➢ WHP5N- RP5N Bridge connection/hook up/protection structure and
tie-ins (Flow Diversion to RP5N, Power & Control)
Intra field Pipelines:
• PL56N, from RP5N to RP6N (Approx. 11.1 km)
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Item
COMP3B Offshore Facility Description
• PL54N from RP5N to RP4N (Approx. 19.1 km) • PL54LN from RP5N to RP4N (Approx. 19.1 km) • Associated tie-ins to RP4N and RP6N topside.
Composite Cables:
• New composite cable WHP12N to RP5N (Approx. Length 9.1 km) • New Composite Cables RP6N to RP5N (Approx. Length 10.1 km)
Post Installed J-Tube:
• One (1) on WHP12N Brownfield Modifications:
• WHP’s
o WHP4N - HIPPS Decommission, Thermowell Upgrade, Flow Diversion between WHP and RP, Power and Control Tie-in, Piping Installation (including RP4N-WHP4N Bridge)
o WHP5N – Production Header Tie-in’s (Isolation with smart plug) and Flow diversion (x2), HIPPS decommissioning (x2), Test Separator Internals Upgrade. MEG system mods
to RP5N
o WHP12N - Power and Control Tie-in
• RP’s
o RP4N - Reconfigure existing HIPPS and install new HIPPS, Intra field, Pipeline PL54 N/LN, Power and Control Tie-ins, Dropped Object Protection Structure, BDV Platform and Piperack.
o RP6N – Hook-up of Intra-field Pipeline PL56N
• NFB-PU Power & Control modifications (Connection of Controls
related to RP5N to NFB through WHP5N)
Pipeline Decommissioning:
• 16” PL56 Subsea Spur line from WHP5N to reducing barred tee in
subsea tie-in skid on PL6
• 16” PL54 Subsea Spur line from WHP5N to reducing barred tee in
subsea tie-in skid on PL4
• Decommissioning of topside instrumentation and ICSS controls
associated with spur-line decommissioning in the platform WHP5N and associated logic modifications as applicable.
Pipeline / Subsea cables and Brownfield works support for CP4S Complex Composite Cables:
• New composite cable between RP4S – RP9S. (Approximate length
10km)
• New composite cable between RP4S – WHP12S. (Approximate
Length 6 km)
Post Installed J-Tube:
• One (1) on WHP12S
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Item
COMP3B Offshore Facility Description Spur Line:
• 1 new 8” Fuel Gas Spur line installed, fully tested and preserved from Subsea skid. 0.9 Kms approximately to Platform RP4S topsides from Subsea Skid Brown Field Works:
• WHP12S - Composite cable pull-in and tie-in • RP9S - Composite cable pull-in and tie-in RP4S - Spurline riser
installation and tie-in Composite Cable pull-in and tie-in.
• RGA Power & Control modifications
Pipeline / Subsea cables and Brownfield works support for CP8S Complex: Composite Cables and J-Tubes:
• CP8S to RP11S (Approx. Length 6.8 km) / RP8S to RP11S as an
Option
Spur Line:
• 1 new 8” Fuel Gas Spur line installed fully tested and preserved from Subsea skid (Approx. 0.4 km) to Platform RP8S topsides, including the associated brownfield and hook up work.
FACILITIES-4B
• WHP’s
Brownfield Modifications:
o Test Separator Internal Upgrade and Associated Works-
WHP8S, WHP11S.
o MEG System modifications-WHP8S o MEG System modifications& Parallel header - WHP11S
• RP’s
o Spur lines, Power & Control Tie-ins on RP8S o RP11S/WHP11S-Tie-in (Power and Control) and Parallel
Piping Header
• RGA Power & Control modifications
Pipeline / Subsea cables and Brownfield works support for CP1S Complex Composite Cables:
• Subsea Composite Cable from RT2 to WHP3S (Approx. 7.1 km) • Subsea Composite Cable from RT2 to WHP2S (Approx. 7.6 km)
Fiber Optic cable:
• RT2 to Barzan WHP1 (Approx. 14.3 km)
FACILITIES-5B
Spur Line:
• 1 new 8” Fuel Gas Spur line installed, fully tested and preserved from Subsea skid (0.5 Km Approximately) to Platform RT2 topsides, including the associated brownfield and hook up work.
Brownfield Works: • WHP’s
o BRZ-WHP1 – FO Cable tie-in & Communication Tests
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PROJECT BASIS OF DESIGN FOR COMP3
Item
COMP3B Offshore Facility Description
o WHP2S – Composite cable pull-in and tie-in o WHP3S – Composite cable pull-in and tie-in
• RGA Power & Control modifications • RT&RT2 – Composite Cable and associated modifications
RP3S Riser Platform with bridge link to WHP3S, Intra field Pipelines and associated Brownfield Work: New Riser Platform RP3S:
• Top side, Jacket, Bridge BR3S between RP3S and BSP3S and Bridge
support platform BSP3S
Intra field Pipelines:
• 1 x 24” CRA Clad Intra field Pipeline (PL3LS) and stalk on risers from
RP3S to RT2 (Approx. 6.8 km)
Brownfield Modifications: RT2 Brownfield Modifications:
• 24” intra-field pipeline and Composite/FO Cable Hook-up at RT2. • 2 x 12” New Post-Installed J-tubes • Structural modifications WHP3S Brownfield Modifications:
• Bridge connection, Utilities, Power and ICSS Hook-up to RP3S • Production diversion from wellhead WHP3S to RP3S • Receive Closed Drain/Vent from RP3S • Helideck removal • Decommission existing -RT-WHP3S Composite Cable at Topside
WHP2S Brownfield Modifications:
• Composite Cable Hookup and Power & Control Integration • Post Installed J-tube and structural Modifications. • Decommission existing WHP2S-RT Composite Cable at Topside
RGA Brownfield:
• Modifications to integrate WHP3S, WHP2S and RP3S ICSS Network
at RGA control room.
• Connectivity of the new FOC from BRZ-WHP1 - Restoring the ICSS and telecom connectivity at RGA post BRZ-WHP1 to Riser Tower (RT) Fiber Optic (FO) cable replacement.
•
Install workstation consoles.
Riser Tower (RT) Brownfield: Decommissioning of Cables:
• Decommission existing RT-WHP2S Composite Cable at Topside • Decommission existing RT-WHP3S Composite Cable at Topside • Decommission existing RT-BRZWHP1 Fiber Optic Cable at Topside
FACILITIES-6B
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PROJECT BASIS OF DESIGN FOR COMP3
Item
COMP3B Offshore Facility Description Subsea Cables: In-situ abandonment of existing 2 Composite and 1 FO Cable from RGA Complex:
• Subsea composite cable from RT to WHP2S • Subsea composite cable from RT to WHP3S • FO Cable from RT to BRZWHP1
5.1. Project Location and Orientation
The locations of the new platforms are reported in table below (Hold 2).
Table 5.1.1: New Platform Coordinates and Orientations
Platform
RP3S BSP3S-1 RP5S BSP5S-1 RP9S WHP13N (3) RP5N RP6N
Platform Coordinates (2)
Easting [m]
Northing [m]
Platform Heading w.r.t. North (1) [deg]
603877.330 603860.780 610642.563 610629.200 595390.600 606259.100 611711.719 611641.905
2943928.570 2943995.880 2941441.871 2941372.900 2952965.000 2917549.500 2911988.959 2920882.974
23 23 45 0 45 30 30 90
Notes: (1) Orientations are measured anti-clockwise from True North to Platform North. (2) The coordinates refer to platform centerline. (3) As-built coordinates and orientation are specified for WHP13N Jacket installed by others.
The locations of existing platforms are reported in table below (Hold 2).
Table 5.1.2: Existing Platform Coordinates
Platform
WHP2S WHP3S WHP5S WHP8S WHP9S
WHP11S WHP12S WHP13S RP4S RP7S RP8S
Platform Coordinates
Easting [m] 601916.670 603887.520 610619.630 625078.000 595460.995
620559.705 599342.070 603863.130 602295.600 610787.900 625088.730
Northing [m] 2949676.350 2944006.940 2941300.840 2927021.000 2952915.333
2922307.593 2942867.140 2937100.860 2946945.650 2933941.120 2926941.360
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Platform Coordinates
Easting [m] 620613.392 597981.130
597992.670 597930.620 585941.959 628488.832 611690.447 611544.620
617202.460 628478.120 602272.119
Northing [m] 2922194.710 2945311.080
2945192.140 2945104.840 2940361.913 2919326.115 2912046.680 2920957.711
2918483.020 2919268.710 2928938.363
Platform
RP11S PU (south) RT (south) RT-2 BRZ-WHP1 WHP4N WHP5N WHP6N
WHP12N RP4N PU (North)
5.2. Co-ordinate Systems
The co-ordinate system for all final geophysical coordinates shall be in Nahrwan Qatar datum using the UTM Zone 39 projection for grid coordinates. The following geodetic parameters describe the Nahrwan Qatar (Offshore) reference system.
Local Datum (Offshore) Datum Ellipsoid Semi major axis Reciprocal of flattening Projection Type Central Meridian Latitude Origin Central scale False Easting False Northing
: : : : : : : : : : :
Nahrwan 1967 Clarke 1880 (modified) 6378249.148m 293.465 UTM Zone 39N Transverse Mercator E 51 degrees N 0 degrees 0.9996 500,000.0m 0.0m
5.3. Water Depths
5.3.1. Greenfield
The water depths at the proposed locations are indicated below according to geophysical and geotechnical reports (refer Section 3.2).
Table 5.3.1.1: Greenfield platform water depths
Platform
RP3S BSP3S-1 (Note 1)
Geophysical ref. LAT
Max. W.D. [m] 63.4 63.4
W.D. tolerance [m] 0.634 0.634
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Platform
RP5S BSP5S-1
RP9S RP5N RP6N
Geophysical ref. LAT
Max. W.D. [m] 65.7 65.4
W.D. tolerance [m] 0.657 0.654
67.6 46.2 56.2
0.676 0.462 0.562
Note-1: Water Depth of BSP3S-1 assumed same as RP3S
5.3.2. Brownfield
The water depth (Hold 3) considered for the existing platforms are indicated as follows:
Table 5.3.2.1: Brownfield platform water depths
Platform
WHP2S WHP3S WHP5S WHP8S
WHP9S WHP11S WHP12S WHP13S RP4S RP7S
RP8S RP11S PU (south) RT (south) RT-2 BRZ-WHP1 WHP4N WHP5N WHP6N WHP12N WHP13N (Note 1) RP4N
PU (North)
Min. W.D. [m]
65.700 63.764 45.522 63.900
67.600 62.500 60.600 61.600 64.300 62.700
63.800 62.200
60.800 60.253 61.000 TBC
63.400 TBC
56.100 50.300 TBC
62.300
TBC
Geophysical ref. LAT
Max. W.D. [m] 1-year 67.900 66.294 48.052 67.530
Max. W.D. [m] 10-years 68.000 66.364 48.122 67.600
Max. W.D. [m] 100-years 68.000 66.424 48.182 67.660
71.230 66.130 64.100 65.100 69.600 67.600
69.100 67.500
63.330 62.783 65.600 TBC
66.530 TBC
59.230 55.600 TBC 67.600
TBC
71.300 66.200 64.200 65.200 69.700 67.700
69.200 67.600
63.400 62.853 65.700 TBC
66.600 TBC
59.300 55.700 TBC 67.700
TBC
71.360 66.260 64.300 65.300 69.800 67.800
69.300 67.700
63.460 62.913 65.800 TBC
66.660 TBC
59.360 55.800 TBC 67.800
TBC
Note-1: WHP13N Jacket already installed by Others
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5.4. Design Life
5.4.1. Equipment Design Life
The design life shall be a minimum of 30 years for all new and upgraded Facilities associated with the Services.
5.4.2. Structure Design Life – Jackets, Topsides and Piles
• The design life shall be minimum 30 years for all new structures.
5.5. Rely Upon Data
Following COMPANY-provided data shall be considered Rely Upon for the project:
• Production profiles:
o RGE: March 2020 Production Profile o QG2: May 2022 Production Profiles o RGA: July 2023 Production Profile
Note – For more details on the production profiles, refer to the corresponding Process Design Basis documents (Section 3.2, Ref. [48] to [50]).
• Environmental data as per Metocean Criteria Offshore Qatar (Ref. [3]) and Ref [6] • Environmental Impact Assessment (EIA) data as per NFPS Environmental Impact
Assessment (EIA) Report (Ref. [5])
• Geotechnical and Geophysical Survey Data as per survey reports in Section 3.2 (Ref. [7] to
[47])
- ORDER OF PRECEDENCE
Codes and standards to be applied shall follow the order of precedence listed below:
- Qatari Governmental and Regulatory Regulations
a. Qatar Supreme Council for the Environment and Natural Reserves (SCE), “Final SCE
Standards”, 9 June 2003.
b. Environmental Regulations for Ras Laffan Industrial City, Revision 1, 2005. c. Environmental Protection Law No. 30 of 2002. d. Executive By-Law No.4 of 2005
- COMPANY Procedures, Policies and Standards (Exhibit 5 Appendix I)
- Project Specifications
- Industry Codes and Standards
- COMPANY and CONTRACTOR’s Lesson Learned
For all Greenfield & Brownfield facilities applicable Codes and Standards including Addenda shall be the latest revisions by CONTRACT EFFECTIVE DATE. For any applicable codes and standards that will derive from Laws and/or International/Regional Conventions (for e.g. environmental), the latest revisions shall be in force.
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- UNITS OF MEASUREMENT
SI units shall be used for the Project.
Table 7.1: Units of Measurement
Parameters Area Cathodic current density
Concentrations
Coefficient of Transfer Conductivity Current Density Flowrate (mass-liquid & gases) Flowrate (molar)
Flowrate (volume-liquids)
Flowrate (volume-gases)
Force Frequency
Heat Flow
Heat Flux intensity (for flare radiation) Heat transfer coefficient
Linear Measure
Mass
Mass Enthalpy
Abbreviation m2 A/m2 % mol ppm(v) ppm(w) W/m2.K μS/cm A kg/m3 kg/h kg/s kgmol/h m3/h bbl /d lit/h Sm3/h (Note-1) Sm3/s (Note-1) MMSCFD (Note-1) SCFM (Note-1) Nm3/h (Note-1) kN Hz W kW MW W/m2 W/cm2
Units Square meter Amp per square meter percent mole parts per million (by volume) parts per million (by weight) watt per square meter kelvin Micro Siemens per centimeter Amp kilogram per cubic meter kilogram per hour kilogram per second kilogram-mole per hour cubic meter per hour barrels per day Liter per hour Standard cubic meter per hour Standard cubic meter per second Million Standard cubic feet per day Standard cubic feet per minute Normal cubic meter per hour Kilo Newton hertz Watt kilowatt megawatt watt per square meter watt per square centimeter watt per square meter per degree Celsius W/m2 °C millimeter micrometer (micron) meter kilometer kilogram ton, metric gram milligram kilojoule per kilogram
mm µm m km kg t g mg kJ/kg
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Parameters Material hardness Molar Mass
Molar Volume
Momentum Pipe Diameter Potential
Power
Pressure
Pressure differential
Quantity of heat
Resistance Sound Power Level Sound Pressure Level Specific Volume Specific Heat Capacity
Specific Energy & Latent Heat
Stress
Temperature
Throughput
Thermal Conductivity
Time Velocity
Viscosity
Volume
Units Newton per millimeter square kilogram mole cubic centimeter per mole cubic meter per kilomole kilogram meter per second Inch Volt kilowatt megawatt millimeter of mercury millimeter of water bar absolute bar gauge Bar joule kilocalorie kilojoule Ohm decibel decibel cubic meter per kilogram kilojoule per kilogram kelvin kilojoule per kilogram Megajoule per kilogram Newton per square metre (Pascal) degree Celsius kelvin metric ton per annum kilogram per hour watt per meter kelvin watt per meter per degree Celsius Second / minute / hour / day meter per second centipoise pascal second centistoke millimeter square per second cubic meter cubic centimeter liter
Abbreviation N/mm2 kg.mol cm3/mol m3/kmol kg.m/s in V kW MW mmHg mmH2O bara barg bar J kcal kJ Ω dB dB m3/kg kJ/kg.K kJ/kg MJ/kg N/m2 °C K t/a kg/h W/m.K W/m °C s /min / h / d m/s cP Pa.s cSt mm2/s m3 cm3 L
Note-1: “Standard” conditions are defined at 15.6°C and 101.325 kPa (a). “Normal” conditions are at 0°C and 101.325 kPa (a).
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PROJECT BASIS OF DESIGN FOR COMP3
- ENVIRONMENTAL DATA
The metocean conditions data presented in this section are as per Ref [3] and are directly applicable to Fixed Facilities design. For Pipeline and Cables design the data from Ref [3], integrated as per Ref [72] and are taken into consideration and further discussed in the dedicated design basis Ref [65] & [66].
8.1. General
Site Conditions: Salt laden atmosphere, offshore environment.
8.2. Ambient Temperature and Pressure
Table 8.2.1: Ambient Temperature for offshore environment (from Ref.[6], Table 6.2.1)
Description Expected maximum daily average temperature Expected maximum daily temperature Expected minimum daily temperature Expected yearly maximum temperature Expected yearly minimum temperature
Ambient Temperature (°C) 36 41.4 12.7 45.6 8.3
Design temperature for equipment operating at atmospheric conditions: 49 °C
For HVAC design ambient conditions, please refer to HVAC Design Basis - Offshore for COMP3 Project, Doc. No. 200-42-HV-DEC-00004.
Table 8.2.2: Atmospheric Pressure (from Ref.[6], Table 6.4.1)
Description Minimum barometric pressure Maximum barometric pressure
Atmospheric Pressure (mbar) 998 1020
8.3. Solar Radiation
The maximum solar radiation measured at Doha Airport is 969 W/m2 (310 Btu/h.ft2). The maximum temperature of surfaces exposed to solar radiation (black bulb thermometer) can reach 84 °C.
8.4. Relative Humidity
Table 8.4.1: Relative Humidity
Description Minimum Average Maximum
Relative Humidity (%) 37 71 100
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8.5. Wind Speed
Table 8.5.1: Extreme All-Year Wind (from Ref.[3], Summary Table I).
Return Period
1-year 10-years 50-years 100-years
1-hr Mean Wind Speed at 10 m [m/s]
10-min Mean Wind Speed at 10 m [m/s]
1-min Mean Wind Speed at 10 m [m/s]
3-sec Gust Speed at 10 m [m/s]
13.8 16.3 18.0 18.7
14.8 17.5 19.4 20.2
16.0 19.1 21.2 22.1
17.6 21.1 23.6 24.6
Table 8.5.2: Wind Speed in Adverse Direction (for Flare Radiation & Dispersion calculations)
Description Maximum Minimum
Wind Speed (m/s) 8.9 0.5
8.6. Rainfall Intensity
Table 8.6.1: Estimated Rainfall Intensity (from Ref.[6], Table 6.6.1)
Description Once in 2 years Once in 10 years Once in 50 years
Estimated Rainfall Intensity (mm/h) 12 27 41
The maximum precipitation measured in 24h at Doha Airport is 80.1 mm.
8.7. Seawater Properties
Table 8.7.1: Seawater Properties All Year (from Ref [3], section 3.5, Table 3.5.1)
Depth Level Temperature (°C) Near-Surface Near-bed Salinity (PSU) Near-Surface Near-bed Density (kg/m3) Near-Surface Near-bed Resistivity (ohm m) Near-Surface Near-bed
Minimum
Mean
Maximum
18.1 16.0
36.9 39.0
27.2 24.1
39.5 40.4
35.0 32.5
40.7 42.0
1.02 x 103 1.03 x 103
1.03 x 103 1.03 x 103
1.03 x 103 1.03 x 103
0.17 0.17
0.18 0.18
0.20 0.20
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Table 8.7.2: Seawater Properties, Winter (from Ref [3], section 3.5, Table 3.5.2)
Depth Level Temperature (°C) Near-Surface Near-bed Salinity (PSU) Near-Surface Near-bed Density (kg/m3) Near-Surface Near-bed Resistivity (ohm m) Near-Surface Near-bed
Minimum
Mean
Maximum
18.1 17.2
38.9 39.2
23.6 23.2
40.0 40.3
30.9 31.1
40.7 41.4
1.02 x 103 1.03 x 103
1.03 x 103 1.03 x 103
1.03 x 103 1.03 x 103
0.17 0.17
0.18 0.18
0.20 0.20
8.8. Sea Current Data
Table 8.8.1: Extreme All-Year Current (from Ref [3], Summary Table III).
Return Period
1-year 10-years 50-years 100-years
Total Current Speed [m/s]
Near-surface 1.23 1.40 1.51 1.56
Near-bed 0.62 0.70 0.76 0.79
Residual Current Speed [m/s] Near-surface 0.48 0.65 0.76 0.81
Near-bed 0.24 0.33 0.38 0.41
8.9. Tide Data
Table 8.9.1: Tidal Heights (from Ref [3] Summary Table V)
Tidal Descriptor Highest Astronomical Tide Mean Higher High Water Mean Lower High Water Mean Sea Level Mean Higher Low Water Mean Lower Low Water Lowest Astronomical Tide
Relative to MSL (m) 0.64 0.44 0.29 0.00 -0.11 -0.54 -0.79
Relative to LAT (m) 1.43 1.23 1.08 0.79 0.68 0.25 0.00
8.10. Extreme Seawater Level
Table 8.10.1: Extreme All-Year Water Levels (from Ref [3], Summary Table IV).
Relative to MSL
Return Period
1-year
Extreme Water Level [m] 4.65
Positive Residual Level [m] 0.31
Negative Residual Level [m] -0.56
Relative to LAT Extreme Water Level [m] 5.44
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Return Period
10-years 50-years 100-years
Relative to MSL
Extreme Water Level [m] 6.01 6.95 7.37
Positive Residual Level [m] 0.38 0.42 0.44
Negative Residual Level [m] -0.79 -0.95 -1.02
Relative to LAT Extreme Water Level [m] 6.80 7.74 8.16
8.11. Wave Data
Table 8.11.1: Extreme All-Year Wave (from Ref [3], Summary Table II).
Return Period
Significant Wave Height [m]
1-year 10-years 50-years 100-years 1000-years 2000-years 10000-years
3.6 4.6 5.4 5.7 6.7 7.0 7.7
Mean Zero- Crossing Period [s] 5.1 5.7 6.1 6.2 6.7 6.9 7.2
Peak Period [s]
8.4 9.2 9.8 10.0 10.7 10.9 11.3
Maximum Crest Height [m] 4.3 5.6 6.5 6.9 8.2 8.6 9.5
Maximum Wave Height [m]
7.0 9.0 10.5 11.1 13.1 13.8 15.2
8.12. Fatigue Wave Data
Refer Metocean Design Basis (Ref [64]).
8.13. Seismic Data - Offshore
Wave Period Associated with Maximum Wave Height [s] Lower Central Upper 8.4 9.3 9.9 10.1 10.7 11 11.4
9.2 10.1 10.7 11.0 11.7 11.9 12.4
7.4 8.2 8.7 8.9 9.5 9.7 10.0
A Probabilistic Seismic Hazard Assessment (PSHA) and a Site Response Analysis (SRA), has been performed in order to define the surface ground motion that will be considered for the seismic design purposes and structural verifications, taking into account the local soil conditions. The horizontal peak ground accelerations (PGA) and spectral accelerations for the sites are:
Table 8.13.1: Horizontal Peak Ground Accelerations and Spectral Accelerations
Description PGA T = 0.2 s T = 3.0 s
ELE (g) 0.092 0.23 0.028
ALE (g) 0.30 0.75 0.083
8.14. Splash Zone
For the Greenfield facilities, the splash zone is defined as that region between (-)2m with respect to Low Astronomical Tide (LAT) and (+)2m with respect to Highest Astronomical Tide (HAT). The details of Splash Zone calculation is reported below:
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Table 8.14.1: Splash Zone Elevations for New Facilities
Elevation description Elevation relative to LAT HAT Subsidence Settlement Water Depth tolerance Calculated Splash Zone Upper Limit Splash Zone Upper Limit Elevation relative to LAT Water Depth tolerance Calculated Splash Zone Lower Limit Splash Zone Lower Limit
[m] +2.00 +1.43 +1.10 +0.30 +0.64 +5.47 +5.50 -2.00 -0.64 -2.64 -2.70
Accordingly, above table the splash zone is considered from -2.7m to +5.5m with respect to LAT.
For existing facilities, the following splash zone data (Hold 4) as per original design shall be considered:
Table 8.14.2: Splash Zone Elevations for Existing Facilities.
Platform Name
QGN WHP4N QGN WHP5N QGN WHP6N QGN WHP12N QGN WHP13N Jacket QGN RP4N QGN PU BRZ-WHP1 QGS RT QGS RT-2 QGS PU QGS WHP2S QGS WHP3S QGS WHP5S QGS WHP8S QGS WHP9S QGS WHP11S QGS WHP12S QGS WHP13S QGS RP4S
Existing Splash Zone Lower limit (LAT) -1.917m TBC -1.626m -2.700m TBC -2.700m -3.200m TBC -2.053m -2.700m -2.300m -2.300m -2.300m TBC -2.300m -2.630m -2.300m -2.200m -2.200m -2.700m
Existing Splash Zone Upper limit (LAT) +3.683m TBC +3.974m +5.600m TBC +5.600m +6.400m TBC +3.300m +5.600m +3.300m +3.300m +3.300m TBC +3.300m +2.970m +3.300m +5.100m +5.100m +5.600m
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Platform Name
QGS RP7S QGS RP8S QGS RP11S
Existing Splash Zone Lower limit (LAT) -2.700m -2.700m -2.700m
Existing Splash Zone Upper limit (LAT) +5.600m +5.600m +5.600m
8.15. Marine Growth
Marine growth profile, relative to LAT, is as follows:
Table 8.15.1: Marine Growth Profile
Depth EL(+)2.49m to EL(-)6.0m EL(-)6.0m to EL(-)30.0m EL(-)30.0m to mudline
Thickness (mm) 100 50 25
Marine growth dry density is 1359 kg/m3
8.16. Subsidence
Subsidence allowance for Greenfield platform design shall be 1.1m.
For existing facilities, the following subsidence data (Hold 5) as per original design shall be considered:
• 1.1m for platforms WHP12N, WHP12S, WHP13S, WHP9S, RT-2 (South), RP7S, RP8S,
RP11S, RP4N and RP4S
• 0.6m for platforms WHP4N, WHP5N, WHP6N, WHP5S, BRZ-WHP1 • No subsidence considered for platforms RT (North & South), PU (North & South), WHP2S,
WHP3S
8.17. Geotechnical Data
Geotechnical data for greenfield and brownfield facilities are as per the survey reports listed in References Section 3.1.
- DISCIPLINE DESIGN BASIS
Refer Section 3.2 for the dedicated Design Basis of each discipline (Ref [48] to [69]) covering all the design data applicable to the project.
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Project: Q-32705 - Saipem COMP3 Folder: RFQ Files