SPE REFRAC Enventure Banff Canada

Utilizing Expandables for Effective Zonal

Isolation in Long Horizontal Refracs

Tight Reservoir Completions: Technology Applications and Best Practices

Banff, Alberta Canada.

May 3-5, 2011

David Mayhall

2

Outline

•Technology Basics

•Application Description

•Installation Summary

•Results

•Lessons Learned

•Q & A

3

Expansion Basics

F or

P x Area

m

sy

OD post

sy ID post

4

The Expansion Process

Dimensional change: I.D. - 4.892” to 6.409”/ O.D. - 5.500” to 7.006”

5

Expandable Zonal Isolation

6

9 5/8 Surface

5 ½ Liner

Typical Initial Barnett well progam

8 stage perf cluster layout

Application Description

Smaller Casing Strings

Less Cuttings

Less Cement

Less Drilling Fluids

Less environmental impact

7

Refrac Liner Installations Summary

• 3 wells – 3000’ – 3500’ (Barnett)

• 1 well – 4000’+ (Marcellus)

• 20 plus re-frac zones/well

• 4 ¼” x 5 ½” (17# -20#)

• Plug and perf

• 6500 psi frac pressures (average)

• Maximized 4.210”(17#) or 4.115 I.D. (20#)

• Flush through bore for additional re-frac or

zonal shutoff

.

8

Well 1 recompleted using SET technology. 4 1/4" x 5 1/2" system

Comparison with wells 3 &4 (traditional completion)

100

1,000

10,000

100,000

10/10/06 1/18/07 4/28/07 8/6/07 11/14/07 2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10 8/10/10 11/18/10 2/26/11

Time

Gas

Rat

e M

CF/

Mo

nth

Well #1 Well #3 Well #4

SET system recompletion

Well 1 recompleted using SET technology. 4 1/4" x 5 1/2" system

100

1,000

10,000

100,000

10/10/06 1/18/07 4/28/07 8/6/07 11/14/07 2/22/08 6/1/08 9/9/08 12/18/08 3/28/09 7/6/09 10/14/09 1/22/10 5/2/10 8/10/10 11/18/10 2/26/11

Time

Gas

Rat

e M

CF/

Mo

nth

Well #1

SET system recompletion

10

Well B recompleted using SET technology. 4 1/4" x 5 1/2" system

100

1,000

10,000

100,000

3/9/07 9/25/07 4/12/08 10/29/08 5/17/09 12/3/09 6/21/10 1/7/11

Time

Ga

s r

ate

Mscf/

mo

nth

SET system recompletion

11

Lessons Learned

•Pre-planning & coordination

•Candidate Screening essential

•Clean-out run

•Friction Reducers

•Place TOL in build section – Re-entry guide

•Expansion contingencies effective

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Questions?