Offshore Drilling Operations Jeff Bugden Canada-Newfoundland Offshore Petroleum Board

Outline n Project Management & Engineering n Equipment and Systems n Typical Offshore Drilling Program n Operational Considerations

Atlantic Basins

TERRA NOVA FACILITIES CONCEPTUAL LAYOUT Source: Petro-Canada, 1997

Ice Bergs

Glory Holes

Glory Holes - Dredging

Terra Nova FPSO

HIBERNIA PRODUCTION SYSTEM

Drilling Installations

Nomenclature n BHA n Mudlogging n SCSSV n BOP n LWD n CT n KOP n MWD n Fishing n Topdrive n Xmas tree n Sidetracking n Logging n MDT n Kick n Wellhead

Part 1 - Project Management & Engineering Considerations n Drilling Installation n Well Design n Contracting and Procurement n Casing, Cementing, Drilling Fluids

Drilling Installation Geological Prospect (well depth, pressures) Environmental Factors (weather, ice, water depth, station keeping) Regulatory Requirements Solids Control Pipe Handling Eqpt Well Control EquipmentRated Drilling DepthPower Requirements (hoisting equipment, mud pumps, rotary system)

Conceptual Well Design Well Design Geological Objectives Evaluation Objectives Drilling Hazards Formation Pressures “Problem” Zones Offset Well Data Time Estimate Cost Estimate $$ BUDGET $$

Casing Program Casing Design Geological Objectives Evaluation Objectives Testing Program Overpressure Zones Fracture Pressures Lost Circulation Zones Detailed Design (Burst, Collapse, Tensile, Wear, H 2 S) Grade, Weight, Connectors, Setting Depth Regulatory Requirements

Cementing Program Cementing Temperatures Fracture Pressures Lost Circulation Zones Zone Isolation Well Abandonment Well Control Detailed Design Cement tops, recipes, slurry properties, additives, displacement rates, centralization, equipment & procedures Regulatory Requirements

Drilling Fluids Program Drilling Fluids Wellbore Stability Formation Protection Formation Evaluation Equipment Compatibility Lost Circulation Zones Well Control Recommendations Type, desired physical and chemical properties, solids control requirements Torque and Drag

Directional Drilling Program Directional Program Current Targets Future Targets Formations Faults Dip Torque and Drag Recommendations Type of Curve, KOP, BUR, DOR, BHA, Directional Drilling Assembly, MWD Equipment

Bit Program Lithology (well logs) Compressive Strength Abrasiveness Stickiness Offset Bit Records Economics Recommendations Bit Types (Roller Cone or PDC), Hydraulics (Nozzles), Motor/Turbine Drilling, WOB, RPM

PDC/Roller Cone Bits

Part 2 - Equipment & Systems n Circulating System n Motion Compensation Equipment n Drilling Assembly n Hoisting System n Well Control System

Motion Compensators

Marine Riser

Drilling Assembly

Drawworks

Crown Block

Top Drive

Drill Floor

Iron Roughneck

Mud Pumps

Drillers Cabin

Well Control System - BOP Stack

BOP Control System

Part 3 - Typical Drilling Program Assumptions: Semisubmersible Anchored 100 metre water depth

Typical Drilling Program n Position rig. n Run Anchors. n Pretension mooring lines. n Survey seafloor with ROV.

Typical Drilling Program n Run TGB. n Spud well. n Drill 36” (914mm) hole to 200 metres. n Run and cement 30” (762mm) conductor pipe with PGB and low pressure wellhead housing.

Typical Drilling Program n Drill 26” (660mm) hole to 500 metres. n Run and cement 20” (508mm) surface casing with high pressure wellhead housing. n Run BOP stack and marine riser.

Typical Drilling Program n Drill 17 1/2” (445mm) hole to 1,500 metres. n Run wireline logs. n Run and cement 13 3/8” (340mm) casing.

Typical Drilling Program n Drill 12 1/4” (311mm) hole to 3,000 metres. n Core any hydrocarbon intervals n Run wireline logs. n Run and cement 9 5/8” (244mm) casing.

Typical Drilling Program n Drill 8 1/2” (216mm) hole to 3,500 metres. n Core any hydrocarbon intervals n Run wireline logs. n Run and cement 7” (178mm) liner (if well is to be tested).

Part 4 - Operational Considerations n Heavy Weather u Marine Forecasts u Operational Limits n Ice Bergs u T-Time u Ice Management

Forecasts n Wind Speeds n Waves n Heave n Pitch and Roll

Wind Speeds

Heave

Jeanne d’Arc Basin Operations - Floating Operations Manual Safe Operational Limits

T-Time

Ice Management

Concluding Comments

THE END