Excape Completion Process Reduces Gas Emissions and Speeds Well Completions
14th Annual Natural Gas STAR Workshop14th Annual Natural Gas STAR WorkshopHouston, TexasHouston, Texas
October 2007October 2007
Original Driver for the Technology Development: Cook Inlet, Alaska Beluga Gas Sands
� 10 to 20 sand bodies typically encountered
� 1700’ gross interval
� Each sand 5’ to 30’ thick
� Permeability 0.01 to 3 md
� Unfrac’d well rate 500 to 1,000 mcfd. Some individual sands too tight to produce without stimulation.
2
3
How am I going to frac this???
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
4
5
Conventional Well Completion
Time (days)
Water and Frac Fluid Rate
Gas Rate
6
Casing Conveyed Perforating Completion
A A *
7
Cross-Section of Gun Assembly
`
A A *
3½” casing 2⅜” guns
borehole control line
Other ChargePhasings,
Shot Densities Available
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
– with past knowledge. – Marathon, typically 15 in one
hour
8
Radioactive MarkerRadioactive Marker
Perforating GunPerforating Gun
9
Module PlacementModule Placement
•West Texas Rig
10
Pres
sure
Pres
sure
TimeTime
Technical Achievements Marathon 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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12
Excape Well Completion
Time (days)
Water and Frac Fluid Rate
Gas Rate Unloading Rate
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Marathon Alaska Excape Well Post –Completion Production Data
KBU 23-7 Test Data As 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
How Much Gas Was Not Vented? Marathon Alaska Excape Wells
Excape Completion Process
Well Name Location 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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15
Estimated Gas Not Vented
Reduction in Venting Volume
MC F
1 , 00 0 M C F
2 , 00 0 M C F
3 , 00 0 M C F
4 , 00 0 M C F
5 , 00 0 M C F
6 , 00 0 M C F
7 , 00 0 M C F
8 , 00 0 M C F
9 , 00 0 M C F
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
-6 KBU 11
-7 GO 4
KBU 24-6R
DCLU
11
KBU 24-7x
• Sum of the amounts: ~100 MMSCF
Maratho
n, Drumhe
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ason
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Maratho
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lroy Ran
ch117
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6-33
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Encan
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Maratho
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Al. 11-
ratho
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#4 A
Maratho
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nery
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ty Oil &
Gas, B
arron #
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Maratho
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-8
Maratho
n, KBU 41
-
EOGReso
urces
, Stag
gs #
6
Infini
ty Oil &
Gas
, Hort
on# 1
-Can
ada Wel
Maratho
n, KBU
24-6
16
Modules Run Per Well
Number of Modules Run Per Well
modules
5 modules
10 modules
15 modules
20 modules
25 modules
30 modules
r e 16 1 11 X #21 D
47
En
9 t. 1
Ma
lt. H -H
Y 6 -H H l
RD
COMPLETED WELLS
•
•
•
•
Maratho
n, Drumhelle
r
Phillip
s,Mas
onEsta
te
BP, Call
um 16
El Pas
o, Farl
eyA-1
Maratho
n, Beave
r Creek 1
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Maratho
n, KBU
43-7X
BP, McE
lroy Ran
ch 117
#21
Shell,
Mesa
6-33D
Encan
a, Biss
ette A-20
Encan
a, E
CA Bissett
e D-47
En can
a, Cana
daWell a
-2-c /
93-P
-9
Maratho
n, GW
Taylo
r No.
2 Alt.
Maratho
n, CL S
eegers
et. A
l. 11-1
Ma ratho
n, FM Tay
lorHeirs
13#4
Alt.
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n, Can
nery
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ty Oil &
Gas
, Koem
el#1-H
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tyOil &
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arron #
2-H
Maratho
n,KBU 11-8Y
Maratho
n, KBU
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EOG Reso
urces
, Stag
gs #
6-H
Infini
tyOil &
Gas
, Hort
on #
1-H
Canad
a Wel l
Maratho
n, KBU
24-6
RD
Well Depths
Excape Well Depths
4,000 M
3,000 M
2,000 M
1,000 M
14,000 Feet
12,000 Feet
10,000 Feet
8,000 Feet
6,000 Feet
4,000 Feet
2,000 Feet
Feet
Dep
th, F
eet
17
18
Technology Acceptance: Modules vs. Time
Cumulative Modules vs. Time
modules
50 modules
100 modules
150 modules
200 modules
250 modules
300 modules
350 modules
400 modules
450 modules
500 modules
550 modules
600 modules
650 modules
700 modules
750 modules
0 6 12 18 24 30 36 42 48 54 60 66 72 78 84
Months since First Job
C OM PLET ED W ELLS
Maratho
n, Drumhelle
r
Phillip
s, Mas
onEsta
te
BP, Call
um16
El Pas
o, Farl
eyA-1
Maratho
n, Bea
ver C
reek 1
1
Maratho
n, KBU 43-7
X
BP, McE
lroy R
anch
117 #2
1
Shell,
Mesa 6-
33D
Encan
a, Biss
ette A-20
Encan
a,ECA Biss
ette D
-47
Encan
a, Cana
da W
ell a-2-
c / 93-P
-9
Maratho
n, GW
Taylo
r No.
2 Alt.
Maratho
n, CL See
gerset.
Al. 1
1-1
Maratho
n, F M
Taylor
Heirs
13 #
4 Alt.
Maratho
n, Can
nery
Loop 9
Infini
tyOil &
Gas
, Koem
el#1-H
Infini
ty Oil &
Gas
, Barro
n # 2-H
Maratho
n,KBU 11-8Y
Maratho
n, KBU
41-6
EOG Reso
urces
, Stag
gs #
6-H
Infini
tyOil &
Gas
, Hort
on# 1
-HCan
ada Well
Maratho
n, KBU 24
-6RD
19
Excape Well Deviation
degrees
10 degrees
20 degrees
30 degrees
40 degrees
50 degrees
60 degrees
70 degrees
80 degrees
90 degrees
Deg
rees
COMPLETED
Excape Well Deviations
93º
Excape: Technical Operating Efficiencies
Industry Marathon Only Horizontal
Review Date: 3/13/2006 3/13/2006 3/13/2006
Number of Modules Installed 677 373 146
Number of Modules Attempted to be Fired w/control line 631 340 113
Number of Modules Successfully Fired w/control line 589 339 102
Percent successfully fired 93.3% 99.7% 90.3%
Number of Fracture Stimulations 602 315 106 Number of Premature Screenouts on Frac Jobs 22 15 0 Percent of Frac Jobs which Screened out Prematurely 3.7% 4.8% 0.0%
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ConclusionConclusion
This Excape Technology is reliable, and has safetyThis Excape Technology is reliable, and has safety and environmental benefitsand environmental 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--zonezone stimulation techniques, which is beneficial to industrystimulation techniques, which is beneficial to industry
as a whole.as a whole.
The amount of gas which can avoid being vented isThe amount of gas which can avoid being vented is very significant.very significant.
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