12th Annual Montana Tech

1

• 12th Annual Montana Tech
• SPE Spring Symposium
• Multi-Stage Fracturing
• Systems for Multilateral Wells
• Rocky Seale Packers Plus
• April 26, 2007

2
Outline

• Horizontal StackFRAC Operations
• Multilateral StackFRAC Operations

3

• StackFRACTM
• Multi-Stage Fracturing Treatment System

4

• The Tool String is Run-in the Hole

5

• Hydraulically set all packers
• Pressuring up the hydraulic FracPORT
• 1st stage of frac performed on toe of well

6

• A ball is dropped to activate the FracPORT and
  2nd stage is fractured

7

• The 3rd FracPORT is activated

8

• The 4th FracPORT is activated

9

• The 5th FracPORT is activated and job completed

10
Microseismic
11
Microseismic
12
Microseismic
13
Multilateral StackFrac Systems
14
Benefits

• Reduced well costs
• Enhanced drainage
• Ability to design well construction to fit
  specific reservoir requirements
• Low permeability
• Thin pay sections
• Vertical permeability barriers

15
Risks

• More time drilling
• More formation exposed
• Options to reduce
• More complex operations
• Some operations may require well control
• Running frac string
• Changing laterals

16
Design Considerations

• Pay thickness
• Exit in pay
• Exit above the pay and build above
• Frac objectives
• Length
• Height
• Juncture location
• In Pay
• Above Pay
• In the build section

17
Juncture Construction

• StackFRAC systems do not require
• expensive hardware
• locating collars
• pre-milled window
• Any juncture can be utilized, and any milling
  system can be used to create the juncture

18
Juncture Types

• Level 5 Junction Created

19
Juncture Integrity

• Near juncture isolation
• High pressure sealing for stimulation
• 8,500 PSI actual case history
• 10,000 PSI rated
• Quick install
• Installed with the stimulation system
• Debris isolation available

20
Juncture Options (Top View)
Tuning fork
Fishbone One
Target Laterals
Stacked Laterals
Fishbone Two
21
Juncture Options (Side View)
Tuning fork
Fishbone One
Target Laterals
Stacked Laterals
Fishbone Two
22
Juncture Options (Location)

• Cased Hole Juncture
• Vertical
• Build Section
• Horizontal (or nearly horizontal)
• Open Hole Juncture
• Build Section
• Horizontal (or nearly horizontal)

23
Juncture Options (Location)

• Cased Hole Juncture
• Vertical
• Exit casing above the formation
• Exit in competent formation
• Build section or reach to formation penetration
• Normally necessary to isolate some or all of the
  build section (casing window to formation entry
  point)

24
Juncture (Cased Hole Vertical)

• Dual lateral well with the juncture at or near
  target interval generally exit above the
  formation and to build into the zone with
  penetration some distance above. It can also be
  used for Stacked Laterals or Target
  Penetrations.
• In some cases, the build section may require
  isolation for stability or board requirements.

25
Juncture (Cased Hole Vertical)

• Lower lateral is completed with a liner hanger
  packer in casing either vertical, in build, or in
  the horizontal section.

26
Juncture (Cased Hole Vertical)

• Upper lateral is isolated using an anchored
  packer system that is set at or neat the wellbore
  juncture. The StackFRAC assembly extends into
  the lateral.

27
Juncture (Cased Hole Vertical)

• With both completion systems installed, each
  lateral can be stimulated individually and the
  juncture is temporarily converted to a TAML Level
  5 during stimulation flow back.

28
Juncture (Cased Hole Vertical)

• Advantage
• Conventional milled window
• Controlled juncture
• Easy access
• Predictable juncture shape

29
Juncture (Cased Hole Horizontal)

• Cased Hole Juncture
• Horizontal (or high angle)
• Exit casing in the formation
• No build section to deal with
• All areas of the well are productive
• Controlled juncture
• Formation must be competent

30
Juncture (Cased Hole Horizontal)

• The cased hole juncture exit window is milled in
  the formation so that all exposed rock is
  formation, and no build section is required. It
  can be used for any lateral type, and provides a
  predictable exit.

31
Juncture (Cased Hole Horizontal)

• The casing is set horizontal or at a high angle
  into the producing formation. A window is milled
  and the second lateral is drilled. Frac systems
  are placed in both laterals.

32
Juncture (Cased Hole Horizontal)

• The StackFRAC system for the lower lateral is run
  and installed and can be tied to the casing or
  open hole.

33
Juncture (Cased Hole Horizontal)

• The upper lateral system is installed and
  anchored to the rock in open hole.

34
Juncture (Cased Hole Horizontal)

• A frac string is installed and tied to each
  lateral during stimulation. Following
  stimulation, the production tubing can be tied to
  one of the laterals.

35
Juncture (Cased Hole Horizontal)

• Advantage
• Conventionally milled window
• Controlled juncture
• Easy access
• Predictable juncture shape
• No overlying formations to deal with in the build
  section of the well

36
Juncture (Open Hole Sidetrack)

• Open Hole Juncture
• Exit in the formation (or above)
• No build section to deal with
• No retrievable whipstock to deal with
• Juncture is not as predictable
• Sidetrack time will depend on the formation

37
Juncture (Open Hole Sidetrack)

• The dual lateral uses an open hole sidetrack to
  create a juncture, either in or above the
  formation, and the second lateral can be placed
  in any location.

38
Juncture (Open Hole Sidetrack)

• The frac systems can be installed in any order
  and after or before the second lateral is
  drilled. It may be important to control debris
  during drilling.

39
Juncture (Open Hole Sidetrack)

• The mainbore StackFRAC system is installed just
  past the juncture, and anchored to the formation
  rock.

40
Juncture (Open Hole Sidetrack)

• The second lateral StackFRAC system is installed
  just past the juncture, and anchored to the
  formation rock. The top of the assembly should
  be placed at a different depth for identification
  of laterals during completion or production.

41
Juncture (Open Hole Sidetrack)

• Once both frac systems are installed, a frac
  string is installed to stimulate each laterals
  separately. Annulus pressure can be applied to
  minimize differential pressures.

42
Juncture (Open Hole Sidetrack)

• Both StackFRAC systems provide toe-to heel
  stimulation coverage. Laterals can be re-entered
  by connecting tubing string to the liner.

43
Juncture (Open Hole Sidetrack)

• Advantage
• No whipstock required
• No build section to deal with
• Generally faster to drill
• Can install lateral systems in either order
• Disadvantage
• Juncture must be stable
• Less predictable than cased hole junctures

44
System Installation
45
Running Equipment Into Leg 1
46
Disconnect and Pull Work String
47
Running Equipment Into Leg 2
48
StackFRAC Leg 2
49
StackFRAC Leg 2
50
StackFRAC Leg 2
51
StackFRAC Leg 2
52
Switch Legs
53
StackFRAC Leg 1
54
StackFRAC Leg 1
55
StackFRAC Leg 1
56
StackFRAC Leg 1
57
Summary

• Multi-stage Fracturing Technology
• Microseismic
• Multilateral Applications

58
Do It Once! Do It Right!

• Multi-Stage Fracturing
• Systems for Multilateral Wells
• Rocky Seale
• April 26, 2007
• Questions