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2012 Williston Basin Petroleum Conference Bismarck, ND May 22 - 24, 2012 Number of Completion Stages – Does it Matter Jim Thompson Bakken D&C Manager Marathon.

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Presentation on theme: "2012 Williston Basin Petroleum Conference Bismarck, ND May 22 - 24, 2012 Number of Completion Stages – Does it Matter Jim Thompson Bakken D&C Manager Marathon."— Presentation transcript:

1 2012 Williston Basin Petroleum Conference Bismarck, ND May , 2012 Number of Completion Stages – Does it Matter Jim Thompson Bakken D&C Manager Marathon Oil Corporation

2 Topics of Discussion Bakken completion stages  Effect on IP and cumulative production  Optimum number of stages – Other considerations Proppant types and selection criteria  Function  Selection  Transport Messenger word of thanks  Drilling & Completion Team  SS Team – Ahmad Salman  UT Team – Steve Baumgartner 2 Marathon Oil Corporation

3 9000+’ 6” Hole  Single Stage Completions  OH  Uncemented preperforated liner  Crosslinked polymer, linear gel, and/or slickwater fracs  Diverter slugs or balls 9-5/8” 7” 16” UBS LBS MBS Bakken Completion Stages Marathon Oil Corporation 3

4 Bakken Completion Stages 4 Marathon Oil Corporation

5 9000+’ 6” Hole  Multi Stage Completions  Plug and Perf  Frac Sleeves  Rapid adoption of 10 stage Sleeve Technology ― ¼” graduated ball seats  Linear Gel and Crosslinked polymer fracs 9-5/8” 7” 16” UBS LBS MBS 5 Marathon Oil Corporation Bakken Completion Stages

6 6 Marathon Oil Corporation

7 UBS LBS MBS Evolved to 20 stage sleeve technology with 1/8” graduated ball seats  Decreased spacing between stages  Increased amount of stimulated rock volume (SRV) – Versus 10 stage Progression to 40 stages continued with move to 1/16” graduated ball seats Number can be tweaked to operators preference with mixing of sleeves and plug and perf typically referred to as hybrid completion Marathon Oil Corporation Bakken Completion Stages 7

8 8 Marathon Oil Corporation Bakken Completion Stages

9 9 Marathon Oil Corporation

10 Bakken Completion Stages 10 Marathon Oil Corporation

11 Bakken Completion Stages 11 Marathon Oil Corporation

12 Bakken Completion Stages 12 Marathon Oil Corporation

13 Bakken Completion Stages 13 Marathon Oil Corporation

14 Bakken Completion Stages 14 Marathon Oil Corporation

15 15 Marathon Oil Corporation Open Hole 6 Stage Completion 9 Stage Completion 19 Stage Completion 20 Stage Completion Mean 12 Month Cumulative Oil Production (BBL Oil) 41,00045,00059,00088,00091,000* 2006 – 2007 Open Hole Wells 2008 Staged Wells 2009 Staged Wells 2010 Staged Wells 2008 Stage Completion Wells Average # of Stages: 6 Average Proppant Density (lb/ft): Stage Completion Wells Average # of Stages: 9 Average Proppant Density (lb/ft): – 2007 Open Hole Completion Wells Average Proppant Density (lb/ft): Stage Completion Wells Average # of Stages: 19 Average Proppant Density (lb/ft): Staged Wells 2011 Stage Completion Wells Average # of Stages: 20 Average Proppant Density (lb/ft): staged wells cumulative oil production based on extrapolation Data obtained from NDIC public information – 2011 Dunn County Middle Bakken Wells

16 Conclusions  Number of completion stages does have an effect on IP and cumulative production during first year – Increases stimulated rock volume  Other considerations which may effect optimum number of stages – Geology or rock quality Understand natural fractures to determine vertical vs horizontal growth dominance – Flowback practices Conservative or Aggressive choke management – Be consistant to evaluate proper number of stages – Frac design per stage Fluid volumes Proppant volumes Proppant type Consistency is key to determine effect of varying the number of stages – Change one variable at a time keeping others the same – Understand cost implications of each variable for well economic considerations 16 Marathon Oil Corporation Bakken Completion Stages

17 2012 Williston Basin Petroleum Conference Bismarck, ND May , 2012 Proppants and Selection Criteria Jim Thompson Bakken D&C Manager Marathon Oil Corporation

18 18 Marathon Oil Corporation Proppant Types and Selection Criteria %Fines per API/ISO procedure

19 19 Marathon Oil Corporation Proppant Types and Selection Criteria

20 Proppant Function  Keep the created fracture (length and height) open  Provide conductivity contrast to accelerate flow to the wellbore Proppant Selection  Cost  Proppant pack conductivity – minimum 500 md-ft – Size – as large as you can place with frac design – Effective Closure Stress on Proppant = Minimum Horizontal Stress – Fracture Face Flowing Pressure (Pressure in the Producing Propped Fracture) – Fracturing fluid damage – slick water, linear gel, cross link fluids  Crush test – Less than 10% fines generated at maximum closure stress  Predict-K – Tool to predict proppant pack conductivity of planned fracture treatments – Evaluate conductivity of what can be placed, 2 lb/ft2 of 20/40 versus 2.5 lb/ft2 of 30/50, etc. 20 Marathon Oil Corporation Proppant Types and Selection Criteria

21 Proppant Selection (cont’d)  Proppant pack conductivity over the life of well – Production damage (scale, salt, fines, etc.) – Proppant degradation from stress cycling – Embedment into formation face Proppant Transport  Larger proppant provides higher conductivity but may be more difficult to place – Settling rate increases in proportion to the diameter squared  Bridging – Perforation diameter should be six times larger than proppant diameter – Pumping hydraulic fracture width should be three times larger than proppant diameter 21 Marathon Oil Corporation Proppant Types and Selection Criteria

22 Questions Thank You 22


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