Completion and Stimulation Optimization of Montney Wells ...
Considerations for Reserves Recovery Within the Montney Play
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Considerations for Reserves Recovery Within the Heritage Montney Play, British Columbia
SPE#-149201-PP
Kelly Okuszko, P.Eng.Mark Hayes, P. Geo.
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PURPOSE
Study Focus: Report on Heritage Montney reservoir &
completion data to support technical learning and encourage best practices
data available online
Challenge: Grouping analogous wells to make “Apples to
Apples” comparisons
Lack of flowing pressure data to analyze true deliverability on rate restricted wells
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Fort St John
Dawson CreekChetwynd
Hudson’s Hope
Heritage Field
543,434 hectares
As of June 2011:669 producing wells,1.3 bcf/d
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2005-052006-022006-112007-082008-052009-022009-112010-080.227.3817.8235294114.5526315812.0157894711.510526326.7058823539.421428571
37.9193548428.212518.73516.8857142913.3606060614.01818182
56.0551724144.4061538529.6175675722.4957142920.39714286
72.9588235359.4841121536.2601307231.0835443
9.963.5291139260.34509804
0
20
40
60
80
100
120Well Performance by spud year – all wells
2010 2009 2008 2007 2006 2005
Avg
Daily
rate
e3m
3/d
2006
20072008
2009
2010
HZ drilling, multi-stage fracs
Future improvements to learning curve ?
Vertical drilling
2005
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Heritage Montney AMajor Operator areas
As of March 201112 Operators
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Grouping the Data: “Apples to Apples” Comparisons
Sub Areas(localized reservoir quality)
Well Placement(Upper/Middle/Lower)
On Production Year(technical learning & technology)
Completion Technique(cased/openhole, frac fluid, HZ length)
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Sub Areas within the Heritage Montney A Play
54 wells
224 wells
11 wells
31 wells
85 wells
30 wells
59 wells
46 wells
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DAWSONSWANSUNRISE PARKLANDSUNDOWNGROUNDBIRCH
Upper Montney
Lower Montney
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Well Placement: Upper Montney Isopach
Thin <75 m
Thick >200 m
Thin <50 m
25m contours
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Well Placement: Lower Montney Isopach
Thin < 75m
Thick > 275m
25m contours
Swan
Sundown
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Heritage Condensate
Trend
Septimus
Sunrise
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Sub Areas: HZ Well Typecurve
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Sub Areas within the Heritage Montney Play
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0 1000 2000 3000 4000 5000 6000 70000
1
2
3
4
5
6
7
Swan Upper MontneyBy On Prodn Year
Cumulative Gas Production (MMscf)
Op
Gas R
ate
(MM
scfd
)
2007 (29 wells) CO2 7 fracs, 848m3 wtr, 673T sand
2008 (24 wells) N2 8 fracs (↑),1312m3 wtr (↑), 822T sand (↑)
2009 (32 wells) N2 8 fracs,1112m3 wtr (↓), 763T sand (↓)
2010 (6 wells) N2 11 fracs (↑), 1807m3 wtr (↑), 1108T sand (↑)
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Swan – Montney Reservoir Comparison c-3-Hc-56-A
Blue – Upper Montney wellsPurple – Lower Montney wells
Upper Montney
Lower Montney
c-3-H
c-56-A
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0 1000 2000 3000 4000 5000 60000
1
2
3
4
5
6
7
Swan Lower MontneyBy On Prodn Year
Cumulative Gas Production (MMscf)
Op
Gas R
ate
(MM
scfd
)
2007 (7 wells) CO2, 7 fracs
2008 (18 wells) CO2, 8 fracs (↑)
2009 (43 wells), CO2, 7 fracs (↓), 50% OH
2010 (47 wells), 60% CO2, 40% N2 or Slickwater, 9 fracs (↑), 90% OH
2011 (15 wells), 60% CO2/N2, 40% CO2, 9 fracs, 60% OH
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0 200 400 600 800 1000 1200 1400 16000
1
2
3
4
5
6
7
8
9
10
2011 Lower MontneySWAN
Cumulative Gas Production (MMscf)
Op
Gas R
ate
(MM
scfd
)
MURPHY 2010 (19 wells)
CO2 (70%)
9 fracs, 2676m completed, 1559m3 wtr, 70% OH ENCANA 2010 (27 wells)
Mix of CO2, N2, slickwater10 fracs, 1590m completed, 4165m3 wtr, 96% OH
ENCANA 2011 (7 wells)
CO2
12 fracs, 1641m completed, 2494m3 wtr, 40% OH
MURPHY 2011 (8 wells)
CO2 /N2
8 fracs, 2676m completed, 1199m3 wtr, 70% OH
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0 100 200 300 400 500 600 700 8000
1
2
3
4
5
6
7
8
9
10
2011 Lower MontneySwan & Sundown
Cumulative Gas Production (MMscf)
Op
Gas R
ate
(MM
scfd
)
SWAN - CO2/N2 (8 wells)
8 fracs, 2676m completed, 1199m3 wtr
SUNDOWN - CO2/N2 (8 wells) 13 fracs, 1525m completed (↓), 1114m3 wtr
SUNDOWN - CO2 (13 wells)
SUNDOWN - Slickwater (4 wells)
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0 500 1000 1500 2000 2500 30000
2
4
6
8
10
Dawson Upper MontneyBy On Prodn Year
2007
2008
2009
2010
Cumulative Gas Production (MMscf)
Op
Gas R
ate
(MM
scfd
)
2007: 5 fracs, 1196m completed, 1298m3 wtr, 617T sand, 604m3 CO2, 2m3/min
2009: Bigger CO2 Fracs, Higher Pump Rate 10 fracs(↑), 1606m completed(↑), 1578m3 wtr(↑), 960T sand(↑), 1246m3 CO2(↑), 6m3/min(↑)
↑rate restricted
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0 1000 2000 3000 4000 5000 60000
1
2
3
4
5
6
7
8
Sunrise Upper MontneyBy On Prodn Year
2008
2009
2010
Cumulative Gas Production (MMscf)
Op
Gas R
ate
(MM
scfd
)
New operators - learning curve and infrastructure
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0 200 400 600 800 1000 1200 1400 1600 18000
1
2
3
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5
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Sunrise Upper Montney2010 - By Operator
Cumulative Gas Production (MMscf)
Op
Gas R
ate
(MM
scfd
)
TOURMALINE (6 wells)
ENCANA (17 wells)
SHELL (19 wells)
HURON (4 wells) More water & sand, Higher pump rateSmaller completed interval
All slickwater, except ENCANA N2
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0 200 400 600 800 1000 1200 14000
1
2
3
4
5
6
7
8
Septimus Upper MontneyBy On Prodn Year
Cumulative Gas Production (MMscf)
Op
Gas R
ate
(MM
scfd
)
2008 (8 wells) 50% CO2, rest N2, CO2/N2 or slickwater
2009 (7 wells)
60% N2 (CNRL), 40% slickwater (Crew)
2010 (17 wells)
100% slickwater
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0 200 400 600 800 1000 12000
1
2
3
4
5
6
7
8
Septimus Upper Montney2010
Cumulative Gas Production (MMscf)
Op
Gas R
ate
(MM
scfd
)
CREW(6 wells) 5 fracs, 1268m completed, 4952m3 wtr, 1020T sand, 10.7m3/min
CNRL (10 wells) 9 fracs, 1564m completed, 6582m3 wtr, 963T sand,10m3/min
Both slickwaterCNRL –↑ fracs, ↑ water, ↑ HZ
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Observations
Frac ≠ Frac ≠ Frac
Reservoir trumps completion
Notable improvement in gas recovery:
2010 Slickwater fracs (CNRL)Upper Montney at Septimus
2011 Binary CO2/N2 fracs (Murphy)Lower Montney at Swan & Sundown
More to come?
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OPEN FOR STUDY
Heritage Montney Completions Database available online:http://www.bcogc.ca/industryzone/forms/resourceconservation.aspx
Electronic submission of frac reports coming soon !
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ACKNOWLEDGEMENTS
BC Oil & Gas Commission Mark Hayes – Co-author, Petroleum Geologist Travis Mercure – Engineering Analysis Verna Kazakoff – Completions Analysis Richard Slocomb & Ron Stefik – Engineering Guidance
Fekete Associates Inc. Harmony Software – generating typecurves
Canadian Discovery Ltd. Frac Database – detailed frac data including costs
Operators in Heritage Montney – Excel completions dataCNRLMurphyCrewEnCanaShell TourmalineHuronStormARC
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Considerations for Reserves Recovery Within the Heritage Montney Play, British Columbia
More Information:
Kelly Okuszko, P. Eng Mark Hayes, P.
Geo
BC Oil and Gas Commission
250-419-4433 250-419-4431
www.bcogc.ca [email protected] [email protected]
Nov. 2011