Wintershall Noordzee BV is exploring a low-cost development option for marginal satellite fields in the North Sea, focusing on a design that allows re-use post-depletion. The selected substructure concept, SIP 3, is a lightweight, self-installing platform that supports a 400-tonne topside without heavy lift vessels and optimizes installation efficiency. The overall project includes aspects of project execution, cost estimation, and the implementation of renewable energy sources for sustainability.

1. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING Iv-Oil & Gas www.iv-groep.nl DEVELOPMENT OF A MARGINAL SATTELITE FIELD

2. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING INTRODUCTION Iv-Oil & Gas www.iv-groep.nl

3. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING INTRODUCTION Wintershall Noordzee BV is investigating the feasibility to utilize a low cost option to develop satellite fields located in the Dutch Sector of the North Sea where the water depth ranging from 20 to 35 meters. PHILOSOPHY: The design shall allow for re-use after field depletion Lifecycle cost shall always be considered Simple installation/de-installation methodology An ergonomic acceptable lay out Free water knock out Renewable energy Iv-Oil & Gas www.iv-groep.nl

4. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING INTRODUCTION STUDY OBJECTIVES Define a concept, Define a generic topside, Estimate topside weight and space requirements, Recommend a transport, assembly and installation method, Cover implementation aspects of project execution, Estimate capital expenditure. Iv-Oil & Gas www.iv-groep.nl

5. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING INTRODUCTION STUDY PARAMETERS Site data (20 to 35m water depth) Base process data (2 producing wells, 1.8 mln m 3 /d) Materials of construction (Duplex stainless steel) Utilities (Emergency diesel, solar cells and wind turbines) Emergency overnight shelter (4 persons) Design and fatigue life (20 years, Fatigue: x5, x10) Other (wire line operations, no crane) Iv-Oil & Gas www.iv-groep.nl

6. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SUBSTRUCTURES Iv-Oil & Gas www.iv-groep.nl

7. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SUBSTRUCTURES INSTALLATION OPTIONS Crane barge installed with driven piles Installed by jack-up rig or construction barge Self installing SUBSTRUCTURES Conventional multi-legged jacket Minimal braced tower jacket Conductor supported modular structure Monotower Self installing platforms Iv-Oil & Gas www.iv-groep.nl

8. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SUBSTRUCTURES CRANE/BARGE INSTALLED - MULTILEGGED JACKET Advantages Proven concept Supports all marginal topsides Can support work-over units Disadvantages Requires heavy lift vessel Main pile jackets require field welds High installation costs Iv-Oil & Gas www.iv-groep.nl

9. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SUBSTRUCTURES CRANE/BARGE INSTALLED – MINIMAL BRACED Advantages Low weight Disadvantages Requires heavy lift vessel Limited future expansion Jack-up rig required for work-over Iv-Oil & Gas www.iv-groep.nl

10. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SUBSTRUCTURES RIG/BARGE INSTALLED – CONDUCTOR SUPPORTED Advantages Cost effective Disadvantages Topsides limited to 200 tonnes Permitting Not to be pursued Iv-Oil & Gas www.iv-groep.nl

11. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SUBSTRUCTURES RIG/BARGE INSTALLED – MONOTOWER Advantages Low weight Protected conductors and risers Disadvantages Cannot pre-drill wells Work-over requires drilling rig Limited topside weight Sensitive to dynamic motions  fatigue  additional bracings Iv-Oil & Gas www.iv-groep.nl

12. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SUBSTRUCTURES SELF INSTALLING – SIP I Advantages Transport floating on suction piles Disadvantages Separately installed topsides Iv-Oil & Gas www.iv-groep.nl

13. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SUBSTRUCTURES SELF INSTALLING – SIP II Advantages No lifting required at location Docking over pre-drilled wells Re-usable Maximized onshore commissioning Disadvantages Too large to be considered marginal Larger deck width Iv-Oil & Gas www.iv-groep.nl

14. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SUBSTRUCTURES SELF INSTALLING – SIP III Advantages No heavy lift vessel Docking over pre-drilled wells Re-usable Maximized onshore commissioning Disadvantages Topside weight limited Temporary frame required on barge Iv-Oil & Gas www.iv-groep.nl

15. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SUBSTRUCTURES SELF INSTALLING – SIP IV Advantages No heavy lift vessel Docking over pre-drilled wells Re-usable Maximized onshore commissioning Disadvantages Deck and substructure weight too high for a marginal concept Iv-Oil & Gas www.iv-groep.nl

16. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SUBSTRUCTURES CONCEPT SELECTION Installable without a heavy lift vessel Ability to support a 3-well 400 tonnes topside Low weight Minimum decommissioning costs The SIP 3 concept satisfies the criteria of the study and therefore it is selected as the preferred substructure for this study . Iv-Oil & Gas www.iv-groep.nl

17. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SIP 3 Iv-Oil & Gas www.iv-groep.nl

18. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SIP 3 SIP 3 CONCEPT SPT patent Barge installed, fully pre-installed and commissioned Iv-Oil & Gas www.iv-groep.nl

19. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SIP 3 SIP 3 SUBSTRUCTURE 3.5 m OD mono column, 3 suction piles Horizontal mono column orientation for fabrication Upending of the mono column from horizontal to vertical Vertical (lifted) load out with the suction piles attached Installation of topside (substructure at quay / harbour floor) Vertical transportation of the total platform Suitable transportation barge Docking over existing pre-drilled wells Future abandonment and re-installation Iv-Oil & Gas www.iv-groep.nl

20. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING TOPSIDES Iv-Oil & Gas www.iv-groep.nl

21. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING TOPSIDES SIP 3 TOPSIDES Main deck Intermediate deck Top deck (helideck) PROCESS 1.8 mln Nm 3 /d capacity MOC: 900# Duplex Free water Knockout (3 phase separation) Oil skimmer tank Clean water (<30 ppmv oil) overboard 10” pipeline Iv-Oil & Gas www.iv-groep.nl

22. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING TOPSIDES CONTROL, SAFETY AND SHUT DOWN Unmanned autonomous operating classification Control via fibre optics by means of a DCS extension of the host platform Gas detection and intruder alarm Rig connected deluge system (dry) H60 wall (E/I facilities and refuge) Iv-Oil & Gas www.iv-groep.nl

23. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING TOPSIDES ENERGY 2400 watt energy consumption (unmanned mode) Renewable energy sources (wind turbines and solar) WEIGHT Topsides : 340 tonnes Substructure : 860 tonnes Total : 1200 tonnes Iv-Oil & Gas www.iv-groep.nl

24. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING FABRICATION, TRANSPORT AND INSTALLATION Iv-Oil & Gas www.iv-groep.nl

25. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING FABRICATION, TRANSPORT AND INSTALLATION FABRICATION Fabrication at a facility which has unrestricted access to the North Sea. Delivery of mono column (rolled and pre-welded) Delivery of suction piles Fabrication substructure Integration of suction piles with the substructure Installation of sacrificial anodes Installation of SW pump, J-tube and riser inside column Iv-Oil & Gas www.iv-groep.nl

26. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING FABRICATION, TRANSPORT AND INSTALLATION TRANSPORT AND INSTALLATION Marine spread : Main tow tug 60-80 TBP Assisting tug 40 TBP Barge 300 – 400 ft Strand jacks (4 x 600 ton) Suction pumps (3 x) Hang-off frame (at stern of barge) Mooring winches (4 x allows for accurate manoeuvring) ROV spread (seabed survey and wellhead inspection) Survey & positioning spread (platform position monitoring) Iv-Oil & Gas www.iv-groep.nl

27. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING FABRICATION, TRANSPORT AND INSTALLATION INSTALLATION OPTIONS Topside pre-installed at top of column, transport with barge SIP3, offshore lowered with strand jacks (1x jacking), Topside pre-installed at lower section of column, transport with barge SIP3, substructure lowered offshore using strand jacks, deck lifted with strand jacks (2x jacking), Topside installed at top of column, transport on barge, offshore single lift HLV/SSCV (1x lifting), Topside on barge, substructure on barge, offshore installation deck with sheerleg/HLV/SSCV (2x lifting), Transport topside on barge, substructure in hooks sheerleg (1x lowering, 1x lifting). Iv-Oil & Gas www.iv-groep.nl

28. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING FABRICATION, TRANSPORT AND INSTALLATION INSTALLATION The installation of the platform consists of the following phases: Preparation phase Barge mooring Platform lowering Foundation installation Completion activities Iv-Oil & Gas www.iv-groep.nl

29. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING FABRICATION, TRANSPORT AND INSTALLATION INSTALLATION Sea fastening of substructure to the barge using hydraulic pins for swift release of the substructure from the barge after mooring, Tow to the field using tugs, Transport positive range of stability more than 50 degrees (criterion > 36 degrees), Lowering stability (hydrostatic and hydrodynamic) provided by ballast on the suction piles, Lowering and lifting systems using strand jacks, Suction pumps for the installation and future removal of the suction pile foundation, No divers required for installation and removal of installation equipment. Iv-Oil & Gas www.iv-groep.nl

30. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SCHEDULE Iv-Oil & Gas www.iv-groep.nl

31. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SCHEDULE DEFINITION OF PROJECT PHASES Conceptual design Detail design Procurement Construction Onshore test/commissioning Transportation and installation Iv-Oil & Gas www.iv-groep.nl

32. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING SCHEDULE CONCEPT PLANNING Iv-Oil & Gas www.iv-groep.nl

33. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING COST ESTIMATE Iv-Oil & Gas www.iv-groep.nl

34. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING COST ESTIMATE OVERVIEW Iv-Oil & Gas www.iv-groep.nl --- --- --- --- Grand Total --- --- Overall contingency ~15% --- --- Certification --- --- Insurance --- --- Fabrication and installation --- --- Design & Procurement --- --- --- --- Equipment (incl commisioning) --- --- --- Helideck --- --- --- Topsides structual steel --- --- --- Substructure (€·10 3 ) (€·10 3 ) (€·10 3 ) (€·10 3 ) costs costs Total Other Fabrication FoB Description

35. PROJECT MANAGEMENT ● ENGINEERING ● CONTRACTING END OF PRESENTATION QUESTIONS? Iv-Oil & Gas www.iv-groep.nl