advanced well completion
TRANSCRIPT
Advanced Well Completion Technology to Reduce Methane Emissions and Use of Infared Cameras for Leak Detection
Phil SniderMarathon Oil Company
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How am I going to frac this???
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Conventional Industry Solutiona few years ago
• Common stimulation technique–“cherry pick” individual zones–Perforate and attempt to stimulate multiple intervals
–Flow back (venting gas)–Isolate lower intervals–(repeat process multiple times)–Remove all isolation devices and flow well.
• Not very effective–Inevitably bypass much pay–Compromise stimulation design–Time consuming and costly–Infrastructure issues in certain locations
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Conventional Well Completion
Time (days)
Water and Frac Fluid Rate
Gas Rate
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Casing Conveyed Perforating Completion
A A*
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Cross-Section of Gun Assembly
`
A A*
3½” casing2⅜” guns
boreholecontrol line
Other Charge Phasings,
Shot Densities Available
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Isolation Valve Below External Perforating Gun
• Firing the gun actuates a lower isolation valve.
• Valve actuates when a protective sleeve shifts.
– Compatible with cementing and fracturing operations
• Frangible; flapper valve removal is usually easy
–PAST: with coiled tubing.–NOW: DISAPPEARING
• Next firing removes the lower isolation valves
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Module PlacementModule Placement
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Pres
sure
Pres
sure
TimeTime
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Technical AchievementsMarathon Alaska
• Single Day Completion – 24 hour period–16 stages fracture stimulated– with well cleanout and isolation valve removal– gas to sales within 30 hours
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Excape Well Completion
Time (days)
Water and Frac Fluid Rate
Gas RateUnloading Rate
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Marathon Alaska Excape WellPost –Completion Production Data
KBU 23-7 Test DataAs of 0530 7/25/04
630
3789
346
0
250
500
750
1000
1250
1500
1750
2000
2250
2500
2750
3000
3250
3500
3750
4000
7/22/2004 0:00 7/22/2004 12:00 7/23/2004 0:00 7/23/2004 12:00 7/24/2004 0:00 7/24/2004 12:00 7/25/2004 0:00 7/25/2004 12:00
Date & Time
Flow
rate
, MC
FD
WHP GAS RATE H2O RATE
Place well in Sales
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How Much Gas Was Not Vented?Marathon Alaska Excape Wells
Excape Completion Process
Well NameLocation Depth Modules Completed
(Zones Competed) IP
Excape: Estimated
Venting Before Sales
Total Vent time
KBU 42-7 Alaska 7,500 feet 15 modules 3,150 MCFD 700 MCF
Conventional: Number of Frac
Stages
Conventional: Estimated Venting per day, per Stage
Conventional: Estimated Number of Venting Days Per Stage
Conventional: Total Vented
Volume
Reduction in Venting Volume
4 350 MCFD 3. days 4,200 MCF 3,500 MCF
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Estimated Gas Not Vented
Reduction in Venting Volume
MCF
1,000 MCF
2,000 MCF
3,000 MCF
4,000 MCF
5,000 MCF
6,000 MCF
7,000 MCF
8,000 MCF
9,000 MCF
KBU 42-7
KBU 24-6
KBU 44-6
Beave
r Cree
k 11
KBU 43-7X
Beave
r Cree
k 13
KBU 33-6X
Falls C
reek 4
Canne
ry Lo
op 8
KBU 23-7
KBU 11-8X
Beave
r Cree
k 12
Beave
r Cree
k 14
Canne
ry Lo
op 9
KBU 42-6
KBU 22-6
KBU 11-8Y
Canne
ry Lo
op #1
0KBU 41
-6KBU 11
-7GO 4
KBU 24-6R
DCLU
11KBU 24
-7x
•Sum of the amounts: ~150 MMSCF(Alaska Only)
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Modules Run Per Well
Modules Run Per Well
modules
5 modules
10 modules
15 modules
20 modules
25 modules
30 modules
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Well Depths Well
Excape Installations, Well Depth
Feet
2,000 Feet
4,000 Feet
6,000 Feet
8,000 Feet
10,000 Feet
12,000 Feet
14,000 Feet
16,000 Feet
18,000 Feet
20,000 Feet
3,000 M
5,000 M
4,000 M
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Mud Weights Encountered
Excape Installations, Mud Weights
. lb/gal
2. lb/gal
4. lb/gal
6. lb/gal
8. lb/gal
10. lb/gal
12. lb/gal
14. lb/gal
16. lb/gal
18. lb/gal
1.0 S.G.
2.0 S.G.
1.5 S.G.
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Well Deviations
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Excape: Technical Operating Efficiencies
Marathon Total Industry Horizontal
Modules Attempted to Install 501 modules 1001 modules 329 modulesModules Actually Installed 501 modules 984 modules 312 modulesModule Installation Success Statistics 100.0% 98.3% 94.8%
Modules Attempted to Fire 493 modules 946 modules 303 modules
Modules Successfully Fired 491 modules 923 modules 290 modules
Firing Success Statistics 99.6% 97.6% 95.7%
Successful Well Installation Count 44 wells 96 wells 32 wellsReview Date 10/4/2008
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Recent Marathon Horizontal WellDepth: 17,300 feet (5,300 meters)
• Cost Reduction
• Safety
4,374,500$
3,994,200$
380,300$
*note: extra tim e for drilling rig during com pletion is included
Conventional Completion Costs
Excape Completion Costs
Estimated Savings
Cana 1-15H Woodford Shale Well
MAN DAYS 205 man days MAN DAYS 321 man daysMan Hrs. 4,908 man hours Man Hrs. 7,692 man days
8 man days 51 man days192 man hours 1,224 man hours
2,784 man hoursPersonnel Exposure Reduction 36%
1,032 man hours84%
Man Hr. Reduction for Completion
High Risk Man Days
High Risk Personnel Exposure Reduction
Conventional - Cana 1-15H Well COMPLETION PhaseExcape - Cana 1-15 H Well COMPLETION Phase
High risk Man HoursHigh Risk Man DaysHigh risk Man Hours
High risk Man Hr. Reduction for Completion
Believed to be world’s first totally intervention-less completion
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ConclusionConclusion
This Technology is reliable, and has safety and This Technology is reliable, and has safety and environmental benefitsenvironmental benefits
(~50% reduction in man hours, less exposure)(~50% reduction in man hours, less exposure)
It has led to development of competing multiIt has led to development of competing multi--zone zone stimulation techniques, which is beneficial to industry stimulation techniques, which is beneficial to industry
as a whole. as a whole.
The amount of gas which can avoid being vented is The amount of gas which can avoid being vented is very significant.very significant.
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ThermaCAM GasFindIR Camera
• The hand-held infrared (IR) camera is a screening tool• Can detect emissions not visible to the naked eye• Provides actual images of the gas plume in real-time
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ThermaCAM GasFindIR Camera
• Can see natural gas & other volatiles:–Benzene–Butane–Ethane–Ethylbenzene–Ethylene–Heptane–Hexane–Isoprene–MEK–Methane
–Methanol–MIBK–Octane–Pentane–1-Pentane–Propane–Propylene–Toluene–Xylene
• Cannot detect H2S, CO2, CO, or NOx
• Cannot differentiate the gas components or quantify the emissions
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IR Survey: Total Gas Saved per Component per Year
5,164
1,515 1,364577 505
2 30 6 5 10-
1,000
2,0003,000
4,0005,000
6,0007,000
8,0009,000
10,000
Compressor Seal Tank Thief Hatch CompressorOther
CompressorValve
Other
Component Type
Tota
l Gas
Sav
ed p
er C
ompo
nent
(m
cf/y
ear)
Total Gas Saved per Component Total # of Leaks per Component Cumulative Gas Saved
Component Type Leaks:
•Valve (37)
•Tank Thief Hatch (30)
•Other (10)
•Compressor Other (6)
•Compressor Connector (2)
•Compressor Open Ended Line (2)
•Pressure Relief Valve (1)
•Compressor Pressure Relief Valve (1)
•Compressor Valve (5)
•Connection (4)
•Open Ended Line (3)
•Compressor Seal (2)
•Flange (2)
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Camera Video
• Video 1
• Video 2