extended reach slant drilling
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* Marque de commerce de Petro-Canada - Trademark
Extended-Reach Slant Drilling ApplicationMacKay River SAGD Project
Extended-Reach Slant Drilling ApplicationMacKay River SAGD Project
Dwight Teotico & Amy van Thiel
June 3, 2008
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2006 Petro-CanadaMarch 24, 2006 MRX Well Design 2
Introduction - ObjectivesIntroduction - Objectives
Oil Sands in Alberta
MacKay Area Overview
Objectives for MRX
MRX Extended Reach Planning
Execution & Accomplishments
Going Forward
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Oil Sands in AlbertaOil Sands in Alberta
Athabasca Oil Sands
Spans 40 000 square km
Over one trillion barrels of
OBIP 10% accessible through
economical surface miningmethods
Thermal in-situ method Injection of steam to reduce
viscosity of oil
Well pairs drilled horizontal,
parallel and vertically aligned First field tested at AOSTRAs
Underground Test Facility
Environmental surface
impacts are minimized
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MacKay Area OverviewMacKay Area Overview
Located 60 km northwest ofFort McMurray
Petro-Canadas firstcommercial SAGD project.
Estimated lifespan of 25 to30 years
Fort McMurray
Oil SandsOil Sands
RegionsRegions
Mining Area
ALBERTA
Calgary
Edmonton
CROWN
MacKayRiver
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MacKay Area Overview (Cont.)MacKay Area Overview (Cont.)
Executed Drilling Programs
Pad 20/21 25 well pairs (Sept. 2001)
Pad 22/23 21 well pairs (Jul. 2005)
Pad 40 2 well pairs (Jan. 2005)
Pad 24/25 20 well pairs (Apr. 2008)
Current Drilling Program H Pattern 4 well pairs to be completed June 2008
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Objectives of MRXObjectives of MRX
Design the optimum well pairs
Ensure bitumen supply of 40 000 bbl/day at central facility
Design injector and producer to minimize liquid level build-up
Optimize SOR by even steam chamber development
Conventional or Larger Extended Reach Well Bores
Reduction of logistics costsReduction of drilling costs
Reduction of facilities costs
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Extended Reach Cost SAVINGSExtended Reach Cost SAVINGS
Original plan -> 4 pads to drain 8 patterns (54 pairs)
Revised plan -> 2 pads to drain 5 patterns (42 pairs)
Reduction in pads equated to a savings for several areas
Drilling
Facilities Logistics
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Rig UtilizationRig Utilization
Horizon 301
650 m Surface Rig
Vertical or 45 degree slant
drilling capability Utilized due to scheduling
constraints
Precision Drilling 295SL
2200 m Super SingleTM
45 degree slant drilling
capability Designed for specialty drilling
such as SAGD
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GeologyGeology
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Geological ChallengesGeological Challenges
Formations
SURFACE - Unconsolidated sand, boulders, and gravel seams
INT. - High clay content
MAIN - Unconsolidated saturated highly porous bitumen pay Limited True Vertical Depth
Surface Casing (Kick of Point) ~ 60 mTVD
ICP of ~ 135 mTVD
Slant drilling with aggressive build rates Extreme pull downs
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Well Design ChallengesWell Design Challenges
Large diameter hole/casing sizes for surface and intermediatestrings
BHA Design Unconventional Torque and Drag Issues
Torque limitations for installation of slotted liner
Directional profile constraints
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MRX Planning and PreparationMRX Planning and Preparation
Encapsulating Drilling FluidSystem
Eliminate accretion issues
Reduces abrasiveness Allows for mechanical solids
separation
Provides lubricity
Hole Cleaning Capability
Maintain minimum annularvelocity
Moderation of drilling rate tomatch hole cleaning capability
Mechanical cleaning methods
Premium fluid handling and
solids control equipment
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MRX Planning and PreparationMRX Planning and Preparation
Mud Cooling System
Increased well bore stability
Decreased torque and drag
Reduction in cuttings volume
MGT Conveyance
SAGD producers were rangedto the existing OB wells
SAGD injectors were rangedto the producers
TractorCoiled Tubing
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MRX Directional PlanningMRX Directional Planning
Challenges Maintaining angle in sand on
surface hole Drilling at base of producing zone
without entering non-producing
Limestone formation Ranging constraints
Directional Planning &Execution
Maximum planned dogleg of 8s onbuild sections
Close directional control to reduceDLS and tortuosity
Extended reach drillingtechnologies investigated Rotary Steerable AG-itator Slider
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711mm Hole Opener711mm Hole Opener
Used to ream open 311mm pilot hole to 711mm ~ 7000 lbs
Top Section Bottom Section
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Liner Running Installation LimitsLiner Running Installation Limits
Torque limitations under combined loading of tension/ compression
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SAGD Extended Reach Well DesignSAGD Extended Reach Well Design
7" WELL DESIGN
PRODUCER INJECTOR
Spud @ 45deg inclinationG.ELEV (m):
(see survey)
KB. ELEV (m) :
(see directional plan)
Class I BOP (Diverter)
PETRO-CANADA MR1 SAGD
Surface Casing 13 3/8" (339.7mm) Surface Casing
177.8 x 244.5mm
Debris Seal Packer
9 5/8" (244.5mm) Interm. Casing,
2 Blank Joints
Overla
7" (177.8mm) Inj./Prod Slotted Liner
INJECTOR
PRODUCER
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AccomplishmentsAccomplishments
PC NNP1 1533mMD, 131mTVD, 1480m V.S.
11.3:1 V.S to TVD ratio
A li h NNP1
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Accomplishments NNP1Accomplishments NNP1
G i F dG i F d
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Going ForwardGoing Forward
Continued Well Design
Casing/Tubing Configurations
Slotting Design
Cement Integrity
Drilling Challenges
Equipment Limitations
Rig Modifications
Q tiQ ti
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QuestionsQuestions
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