primary funding is provided by the spe foundation through member donations
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Primary funding is provided by The SPE Foundation through member donations and a contribution from Offshore Europe The Society is grateful to those companies that allow their professionals to serve as lecturers Additional support provided by AIME. - PowerPoint PPT PresentationTRANSCRIPT
Primary funding is provided by
The SPE Foundation through member donations and a contribution from Offshore Europe
The Society is grateful to those companies that allow their professionals to serve as lecturers
Additional support provided by AIME
Society of Petroleum Engineers Distinguished Lecturer Programwww.spe.org/dl
1
Improved Recovery and Reduced Cost with Intelligent Interventions
(Make your wells intervention friendly)
Brian Schwanitz Welltec
Society of Petroleum Engineers Distinguished Lecturer Programwww.spe.org/dl 2
Interventions
Introduction: A case for regular interventions
• Unconventional resource wells (shale gas, shale oil, coal gas, etc)
- Have steep declines. Few operators have planned workovers!!
•Intelligent wells are designed to be Intervention-less.
- But is this realistic? They have no plans for workovers!!!
• Why do Subsea wells have 25% – 35% less recovery than platform wells?- Due to less interventions- Wait for wells to die before doing anything
Normal Decline
Years
BPD
3
Agenda
• What is an “Intelligent Intervention”
• The Industry Moves To Electric Line (E-Line)
Mechanical Services
• Examples of Intelligent Interventions
• New Technologies to Watch
4
What are Intelligent Interventions?
• Using Electric Line for surface monitor and control - diagnostics
• Interventions that are faster, safer, with smaller footprint, performing more services,
for less cost and risk
• Performing interventions with the well still flowing, rigless, riserless
• Four Companies Offer Electric Line Mechanical Services
5
Movement is from Heavy to Lighter, Faster, Interventions
Snubbing/HWO
Coiled Tubing
Electric Line
Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction. Albert Einstein 6
What problems can be solved with E-Line Tools
Cleaning Fill - Vacuum Bailers
Milling Scale
Water shut off - hydraulic stroking tool
7
Multilateral Locator
Snubbing/RAS Coiled Tubing WL Tractor RLWI
Interventions by Type
Down hole Tractors
Introduced
Mechanical Services on
Tractors Introduced
Source: Company analysis, Statoil, Norwegian Petroleum DirectorateNote: Riserless Light Well Intervention (subsea well intervention) using tractor technology
More interventions can happen on E-line
Source: 8
Down Hole Tractor
9
4 ½” OD – 17 “
Down Hole Tractor Sizes
4 1/2”
3 1/8”2 1/2”
2 1/8”
Open Hole
CT Tractor
E-Line Hydraulic Stroking Tool
Stroker Tool SizesDiameter: 2-1/8” 3-1/8” 3-1/8” XR 3-3/8” XSLength: 15.3 ft 15 ft 22 ft 13.7 ftWeight: 180 lbs 220 lbs 240 lbs 250 lbsStroke Force 12,000 lbs 20,000 lbs 20,000 lbs 33,000 lbs Completion ID 2.2 – 3.2” 3.2 - 6.85” 3.2 - 6.85” 3.45 - 6.85” 11
Closed
Open
An Intelligent Shifting Tool
Key Tool SizesDiameter: 2-1/8” 3-1/8” 3-1/2”Length: 12 ft 11 ft 11 ft
Weight: 80 lbs 160 lbs 160 lbs
Pressure: 25 K psi 25 K psi 25 K psi
Temp Rating: 400o F 400o F 400o F
Completion ID: 2.4 – 5.5” 3.2 – 5.7” 3.6 – 6.2”12
Surface read-out (position & force)
Sleeve starts to move
Key releasing sleeve
Shear pins break
Sleeve is moving
Stroker arm fully extended
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System Integration Test (SIT) to shift ICV
Hydraulic key tool
Left to right: Tractor, Stroker, Key tools
E-line tools inside ICV 14
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Animation – Shifting a Sliding Sleeve
Vacuum cleaning in liquid filled pipe
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Animation - Cleaning Fill Off a Ball Valve
Cleaning in a Dry Gas Well
E-Line Tractor combined with cork screw bailer
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E-Line Milling Tool Features
• Always run in conjunction with a Tractor or Stroker• Removes scales, cement, valves, nipple profiles, plugs, etc• Near bit stabilizer may improve drilling rate• Involves much planning and often pre-job testing
Milling Tool FeaturesDiameter: 2-1/2” 3-1/2” *Length: 10 ft 10.4–12.2 ftWeight: 70 lbs 95 lbsPressure: 25,000psi 25,000psiTemp Rating: 400°F 400°FCompletion ID: 2.6 in 3.6 in*Tensile Strength: 36,000lbs 42,000 lbsComp. Strength: 30,000 lbs 50,000 lbs
*3-1/8” Well Miller and RCB also available
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Animation – Milling Scale
Tractor + Scale Miller well flowing
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Animation – Milling and Cleaning – same run
Surface Test: Drill thru Cement Plug
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Video – Cutting Pipe
Pipe Sizes 4” – 5 ½”
4.5” tubing retrieval for Sakhalin EnergyDepth Comments
2327 Collar
2329 Collar
2333,6 Collar
Force > 10,000N (2248lbs) Proposed coeffi cient of friction = 0.25Force required to "lift" cutter free = 562 lbs
2341 Cut Depth
2346 Collar
2350 packer
9 5/8" Casing
4 1/2" Tubing
Very fine debris
New Technologies to watch that will make a difference
E-Wireline operated ICV`s and frac ports
E-Line Setting of Internal Patch
• Better measurements to assess problems
• Fiber Optics data acquisition when needed
• Simple wells can be made ‘smart’ at a later date
• Set metal expandable patches– E-line and CT
• More mechanical services; stroke, clean and mill
Fiber Optic cable
25
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Relative Cost of Interventions/Workovers
Land Platform Offshore Rig
RLWI
Rel
ati
ve
Co
st
Subsea Interventions have biggest need for cost reductions
Riserless Light Well Interventions (RLWI) have large impact on subsea wells
• Reduced operation cost• Reduced operating time • Reduced HSE risks
Enables more frequent interventions
Subsea Wells
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Source:
One North Sea platform production by source
BBL/day
Note: Year not disclosed for confidentiality reasons
Light Well Interventions gave a 39,000 bbls/day increase
Keeping up production through regular Interventions
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Intervention Strategy with the Future in Mind
• Design intervention friendly completions:
- Minimize ID restrictions, which limit options to
- Accommodate new technologies
- Be aware of developments in the “pipeline”Fiber optics, metal to metal patches, wireless robotics,ICD’s when needed, etc.
• Accurate diagnostic data is imperative -Must know the problem to solve the problem-Avoid “fixing” something that’s not broke
• The Correct Intervention Strategy :-CT for handling pumping jobs-E-Line for data collecting, selective cleaning, shifting, milling -Riserless workovers (subsea)-Have contingencies planned and tested before completion
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Questions
Thank you for your time