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IPS-14-22
Wireline Perforating Technology Maximizes
Well Productivity and Minimizes Operational Risks
Risal Rahman, Andika Yudhatama, Total E&P Indonesie
Carlos Baumann, Denny Gultom, Harvey Williams, Schlumberger
Field Overview
• Tunu and Tambora, major gas fields in theMahakam Delta
• Cumulative production exceeds 1 Bscfpdand 10,000 bepd
• Most reservoirs are between 7,500 ft(2,285 m) and 15,000 ft (4,580 m) TVD.
• Hundreds of wells drilled since the 1990’s
• Multizone wells (up to 20 zones per well)
Wireline Perforating Technology Maximizes Well Productivity2
Slide 2
1.4
51
.5
5
MW
SGU1.1 2.1
2650
2750
2850
2950
3050
3150
3250
3350
3450
3550
3650
3750
3850
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3800
GRGAPI0 150
volV/V0 1
RTOHMM0.2 20
TGPPM0 10
dtUS/F240 40
0.96
0.97
0.80
0.79
0.88
0.910.85
0.90
0.85
0.95
0.99
0.720.72
0.99
0.73
0.87
0.86
0.570.570.65
0.71
0.740.74
0.45
0.470.48
0.52
1.08
0.34
1.051.05
0.590.590.620.570.570.57
1h
1h-1
1h-2
2a
2a-1
2b
2b-1
2c
2c-1
2d
2d-1
2e
2f
2g
2h
3a
3b
3b-1
3c
3d
3e
4a
4b
4b-1
4c
4d
4e
4f
4g
4g-1
4h
4h-1
4i
4j
4k
4k-1
5a
5a-1
5a-25b
5b-1
5b-2
5c
5c-15c-2
5d
5e
5f
5g
5g-1
TD_DRILLER
O110O110
Q105Q105Q105
Q122
Res name
NPHIV/V0.6 0
RHOB
G/C31.7 2.7LAUQI_1
V/V0 4
Originalwater
Gas(various
pressures0.2-1.5)
Waterrise
0
1000
2000
3000
4000
5000
High PressureBelly
>=1.20sg
Fluviatil channelDistributary channelMouth bar
Gas
MF6
SU1
Tu
nu
Main
Zo
ne
Tu
nu
Sh
allo
w
SU2
SU3
SU4
SU5
SU6
Beta
MFA
FreshWaterSand
MFA
MFB
MF0
MF1
MF1.5
MF2
Intra-beta
ESEWNW
VeryShallow
5km
of
rese
rvoir
sect
ion
Geological Setting & Reservoir Characteristics
10,000s Multi-layered deltaic reservoirs (~30 reservoirs per well)
~2m thickness
Highly heterogeneous on the lateral and vertical connectivity
Highly heterogeneous on pressure regime & fluid properties
TUNU field is maturing
Depleted reservoirs
Risk of water rise
TUNU FIELD CHARACTERISTICS
70
km
20km
Tunu MainZone only
3
Slide 3
PERFORATION TECHNIQUE – DYNAMIC UNDERBALANCE (DUB)
Operational Limitations:
- Conditions to use DUB cleanup:
- Liquid in the wellbore
- Reservoir:
- Porosity > 12%
- Permeability: >1 mD for gas, > 10 mD for oil
- Pore pressure > 2000 psi
- Not in unconsolidated formations / sanding risk
Advantage :
- The DUB cleans perforation damage / plugged tunnels
4
Slide 4
Tubing clear all the way to the bottom of thewell
Cement bond log from bottom to top of cement
Nitrogen kick-off to unload completion brine
Maximum unload to create low wellbore pressure
Perforate with DUB
Well clean up
Remove remaining completion brine andperforation debris
INTERVENTION TECHNIQUE TO PERFORATE NEW WELLS
MAIN INTERVENTION SEQUENCE
0
500
1000
1500
2000
2500
3000
3500
4000
2005 2006 2007 2008 2009 2010 2011 2012 2013
South
North
PERFORATED LENGTH (METERS)
The DUB perforating technique along with the nitrogen kick-off technique has been used in many wells inthe TUNU gas field; nine (9) of these wells are included in this paper.
Wireline Perforating Technology Maximizes Well Productivity5
Slide 5
Gas Wells - Actual / post-job vs. expected / pre-job relative productivity
Wells 1-7 standard DUB perforating jobs
Wells 8-9 post-perforating DUB clean-up jobs
Slide 6
Wireline Perforating Technology Maximizes Well Productivity6
Pre-job estimated productivity calculated based on an integrated toolbox considering several parameters,such as porosity, mobility, reservoir pressure and other reservoir characteristic.
Typical Wireline Jobs for Gas wells: Max safe SUB << Max DUB
Slide 7
Wireline Perforating Technology Maximizes Well Productivity7
DUB cleanup > SUB cleanup > DOB cleanup
Slide 8
Wireline Perforating Technology Maximizes Well Productivity8
The importance of perforating damage cleanup
Slide 9
Wireline Perforating Technology Maximizes Well Productivity9
Slide 10
Case 1: Standard DUB perforating job
After perforating this well produced > 500% of the expected productivity
20-ft long 2.5-in DUB gun with deep-penetrating 12-gram HMX charges
Wireline Perforating Technology Maximizes Well Productivity10
Slide 11
20-ft long 2.5-in DUB gun with deep-penetrating 12-gram HMX charges
Wireline Perforating Technology Maximizes Well Productivity11
Slide 12
Wireline Perforating Technology Maximizes Well Productivity12
20-ft long 2.5-in DUB gun with deep-penetrating 12-gram HMX charges
Wellbore Dynamics – Very Low Weak-Point Load – Animation
20-ft long 2.5-in DUB gun with deep-penetrating 12-gram HMX charges
Wellbore Dynamics – Gunshock Loads – Up to 0.04 sec
Slide 13
Wireline Perforating Technology Maximizes Well Productivity13
Slide 14
20-ft long 2.5-in DUB gun with deep-penetrating 12-gram HMX charges
Wellbore Dynamics – Gunshock Loads – Up to 0.30 sec
Wireline Perforating Technology Maximizes Well Productivity14
Slide 15
20-ft long 2.5-in DUB gun with deep-penetrating 12-gram HMX charges
Wellbore Dynamics – Gunshock Loads – Up to 0.25 sec
Wireline Perforating Technology Maximizes Well Productivity15
Pressure at the fast gauge – Measured vs. Simulated
Slide 16
Wireline Perforating Technology Maximizes Well Productivity16
Comparison between the Concrete-based and the Rock-based model
Slide 17
Wireline Perforating Technology Maximizes Well Productivity17
Slide 18
Comparison between the Concrete-based and the Rock-based model
Wireline Perforating Technology Maximizes Well Productivity18
Slide 19
Case 2: Post-perforating DUB cleanup job
20-ft long 2.88-in DUB gun loaded with DUB charges at 0.5 spf
After DUB cleanup this well produced > 1,200% of the expected productivity
Wireline Perforating Technology Maximizes Well Productivity19
Slide 20
Wireline Perforating Technology Maximizes Well Productivity20
20-ft long 2.88-in DUB gun loaded with DUB charges at 0.5 spf
Wellbore Dynamics – Bottom Gauge Pressure - Animation
Slide 21
20-ft long 2.88-in DUB gun loaded with DUB charges at 0.5 spf
Wellbore Dynamics – Up to 0.04 sec
Wireline Perforating Technology Maximizes Well Productivity21
Slide 22
20-ft long 2.88-in DUB gun loaded with DUB charges at 0.5 spf
DUB amplitude around the gun is larger than at the bottom gauge
Wireline Perforating Technology Maximizes Well Productivity22
Slide 23
Pressure at the fast gauge – Measured vs. Simulated
Wireline Perforating Technology Maximizes Well Productivity23
Conclusions
Slide 24
Wireline Perforating Technology Maximizes Well Productivity24
• DUB Perforating helped deliver highly productive wells in the Tunu field
• DUB enabled perforating long intervals with HSD and deep penetrating
charges, without risk of gun jumping
Slide 25
Conclusions – Cont.
Wireline Perforating Technology Maximizes Well Productivity25
• Total E&P Indonesie uses Dynamic Underbalance (DUB) perforating with
a nitrogen kick-off technique to create perforation tunnels with much
lower skin values / higher productivity
• This approach also promotes natural well flow after perforating, without
the extra cost of coiled tubing intervention to perform liquid unloading
Thank You !
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Wireline Perforating Technology Maximizes Well Productivity • Risal Rahman
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Wireline Perforating Technology Maximizes Well Productivity • Risal Rahman
Wireline Perforating Technology Maximizes Well Productivity • Risal Rahman
Wireline Perforating Technology Maximizes Well Productivity • Risal Rahman
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