Evolution of Multi-Stage Fracturing with Ball Drop Systems

Presentedby,CamStempfleC.E.T.

CompletionsEngineeringTechnologist

4Where is the Canadian Bakken?

-The Bakken extends throughout the Western Canadian Sedimentary Basin and Williston Basin

5Penn West in the Bakken

Penn West is currently located in 2 regions of the Bakken formation

Saskatoon

Regina

Kindersley

West Central Saskatchewan

South East Saskatchewan

6West Central Saskatchewan

-25 horizontal wells drilled to date-Reservoir Quality

- Permeability: 3-12 mD- Porosity: 30-35%- API: 10

-Depths: 5,600 MD (2600 TVD)-Intermediate Casing: 8.625-Horizontal Legs: 2,300-Liner System: 5.5 slotted liner -No stimulation attempted to date

7West Central Saskatchewan

Typical Completion Method:-Run to TD with coil tubing and displace out Aphron mud / sand-Run pump to surface equipment until initial inflow stabilizes-Equip well with progressive cavity pump-Wells completed in 4 days

8South East Saskatchewan

-14 wells drilled to date-Reservoir Quality

- Permeability: 3-20mD- Porosity: 15%- API: 40

-Depths: 8,850 MD (3,600 TVD)-Intermediate Casing: 7-Horizontal Legs: 5,000

9South East Saskatchewan

Liner Systems: - PackersPlus StackFrac - Baker Hughes Frac-Point - Xtreme Oil Tools Iso-Pak

-The number of stages has varied from 11 all the way up to 21-All 3 system has shown benefits with a few issues along the way

10

Open Hole Liner Systems

PackersPlus Stack-Frac4 systems installed to date-Sizes: 4.5-Number of Stages: 11-Ball Sizes: 1.0 and increasing up to 3.5 -Pump Rates: 6.2 bbl/min-Proppant: 2,000 lbs of 50/140 sand and 20,000 lbs of

20/40 sand-Fluid: 3,460 bbl (315 bbl/stage)-Fluid System: Borate Crosslinked Produced Water

11

Open Hole Liner Systems

PackersPlus Stack-Frac System

12

Open Hole Liner Systems

PackersPlus Stack-FracSuccesses:

- 1ST ball drop system used by Penn West in the Bakken - 39 of 44 stages were fractured successfully

Issues:- Ports not shifting open- Ports being set at incorrect depths

13

Open Hole Liner Systems

Baker Hughes Frac-Point8 systems installed to date-Sizes: 4.5-Number of Stages: 11-21-Ball Sizes: 1.125 and increasing up to 3.650 -Pump Rates: 5.0 6.2 bbl/min-Proppant: 2,000 lbs of 50/140 sand and 20,000 lbs of

20/40 sand -Fluid: 4,500 bbl (282 bbl/stage)-Fluid System: Borate Crosslinked Produced Water

14

Open Hole Liner Systems

Baker Hughes Frac-Point System

15

Open Hole Liner Systems

Baker Hughes Frac-PointSuccesses:

- Allowed us to increase our frac density with up to 21 stages- 102 of 115 stages were successfully fractured

Issues:- Sleeves not opening at expected pressure

- Balls breaking when being seated

16

Open Hole Liner Systems

Xtreme Oil Tools Iso-Pak2 systems installed to date on re-entry wells-Sizes: 3.5-Number of Stages: 11 and 15-Ball Sizes: 1 and increasing up to 3.5 -Pump Rates: 6.2 bbl/min-Proppant: 2,000 lbs of 50/140 sand and 20,000 lbs of

20/40 sand-Fluid: 3,770 bbl (290 bbl/stage)-Fluid System: Borate Crosslinked Produced Water

17

Open Hole Liner Systems

Xtreme Oil Tools Iso-Pak System

18

Open Hole Liner Systems

Xtreme Oil Tools Iso-PakSuccesses:

- Fullbore ID after drill out of ball seats

- 25 of 26 stages were fractured successfully

Issues:

- Sleeves not shifting open

19

Conclusion

- By evolving, Penn West was able to increase frac density while saving money-Each system had problems with shifting open sleeves-Experienced service company employees are very important to the success of the job

-Future developments are moving towards full drift systems

Questions?

Slide Number 1Where is the Canadian Bakken?Penn West in the BakkenWest Central SaskatchewanWest Central SaskatchewanSouth East SaskatchewanSouth East SaskatchewanOpen Hole Liner SystemsOpen Hole Liner SystemsOpen Hole Liner SystemsOpen Hole Liner SystemsOpen Hole Liner SystemsOpen Hole Liner SystemsOpen Hole Liner SystemsOpen Hole Liner SystemsOpen Hole Liner SystemsConclusionSlide Number 20