Runtimes for Deviated Rod Pump Wells in the Fruitland Coal Formation

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Ronald Dorsey
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1 10 th Annual Sucker Rod Pumping Workshop Renaissance Hotel Oklahoma City, Oklahoma September 16-19, 2014 Runtimes for Deviated Rod Pump Wells in the Fruitland Coal Formation Elizabeth Kane, ConocoPhillips Cole Maxey, New Mexico Institute of Mining and Technology

2 Agenda Update on Runtimes Review of Historical Failures Case Study From a Recent Repair Conclusions 2014 Sucker Rod Pumping Workshop 2

3 San Juan Basin Mature natural gas basin Most productive coalbed methane basin in North America ConocoPhillips operates ~1,200 wells on rod pump (89% are Fruitland Coal completions) Most coal wells are dewatered and currently produce <5 BWPD 2014 Sucker Rod Pumping Workshop 3

4 Background 54 S shaped wells 5 horizontal wells with the pump in the curve or lateral Tracking and reporting sideload vs runtime First presented in September 2011 Expanded to include all deviated wells and historical failures Sept , Sucker Rod Pumping Workshop 4

5 Data Collection and Uncertainty Runtime is adjusted for extended downtime based on historical production Runtime cannot be adjusted for daily downtime resulting from the use of pump off controllers The effect of pumping speed on maximum sideload is minimal 2014 Sucker Rod Pumping Workshop 5

6 Maximum Sideload (lbf) Current Runtimes of Deviated Wells Adjusted Runtime (years) S Well Horizontal Well 2014 Sucker Rod Pumping Workshop 6

Well Count Current Runtimes of Deviated Wells Adjusted Runtime 8-15 years 4-8 years < 4 years 75% of the wells have a sideload of 100-300 lbf 43%

7 Well Count Current Runtimes of Deviated Wells Adjusted Runtime 8-15 years 4-8 years < 4 years 75% of the wells have a sideload of lbf 43% of the wells have run >4 years, regardless of sideload < >400 Maximum Sideload (lbf) 2014 Sucker Rod Pumping Workshop 7

8 Wear Failure History Many deviated wells have very good runtimes and are still currently running Average failure rate on rod pumped deviated wells from is < 0.1 failures/well/year A review of wear failures showed much shorter runtimes historically than most deviated wells are achieving today 2014 Sucker Rod Pumping Workshop 8

9 Wear Failures of Deviated Wells Unguided Guided Guides are needed at >30 lbf sideload Guides can potentially double runtime 9

10 REVIEW OF RECENT S WELL REPAIR 2014 Sucker Rod Pumping Workshop 10

11 True Vertical Depth (ft.) Well Information S well 4 year adjusted run life with ~430 lbf maximum sideload Guided string with sinker bars in the slant section 7/8 rods, 10 guides per rod 3/4 rods, 5 guides per rod Wellbore Profile 7/8 rods, 10 guides per rod 3/4 rods, 5 guides per rod Sinker bars 3/4 rods, 5 guides per rod Horizontal Travel (ft.) Sucker Rod Pumping Workshop 11

12 Data Collection Measured 5 guides per rod and all couplings 2 guide diameter measurements per guide 1 coupling diameter measurement across the most worn section Measured the height of each wing from the base of the rod guide on 1 guide per rod Result is ~3,100 measurements allowing a detailed wear profile to be created and analyzed 2014 Sucker Rod Pumping Workshop 12

13 Data Collection measurements per guide on 5 guides per rod 4 measurements per guide on 1 guide per rod 2 Total Guide Loss = (Original Diameter Measured Diameter) Asymmetrical Wear Ratio = Max Guide Height / Min Guide Height 2014 Sucker Rod Pumping Workshop 13

14 Other Data and Missing Data Other Data: Tubing inspection identifying rod wear and corrosion Deviation survey Missing Data: Daily runtime Rod rotator time in use 2014 Sucker Rod Pumping Workshop 14

15 Measured Depth (ft) Measured Depth (ft) Tubing Inspection Total Guide Loss per Rod (in) Asymmetrical Wear Ratio SINKER BARS 15

16 Sideload vs. Guide Wear Increased wear at low sideloads in the slant section 2014 Sucker Rod Pumping Workshop 16

17 Conclusions For shallow gas wells, >4 year runtimes can be expected in deviated wells with up to 430 lbf sideload when rod guides are used Rod guides should be used when sideloads exceed 30 lbf/rod Sinker bars in the slant or curve sections can lead to excessive wear and may contribute to failures in guided sections In one well, the slant section showed increased wear at lower sideloads than the 2 curve sections 2014 Sucker Rod Pumping Workshop 17

18 Acknowledgements Joe Colley and Chris Pierson Production Engineering Kelly Kolb and Jeff Welch Implementation The Rod Pump Team Gary Noyes Energy Pump and Supply 2014 Sucker Rod Pumping Workshop 18

19 Questions? 2014 Sucker Rod Pumping Workshop 19

20 Copyright Rights to this presentation are owned by the company(ies) and/or author(s) listed on the title page. By submitting this presentation to the Sucker Rod Pumping Workshop, they grant to the Workshop, the Artificial Lift Research and Development Council (ALRDC), and the Southwestern Petroleum Short Course (SWPSC), rights to: Display the presentation at the Workshop. Place it on the web site, with access to the site to be as directed by the Workshop Steering Committee. Place it on a CD for distribution and/or sale as directed by the Workshop Steering Committee. Other use of this presentation is prohibited without the expressed written permission of the author(s). The owner company(ies) and/or author(s) may publish this material in other journals or magazines if they refer to the Sucker Rod Pumping Workshop where it was first presented. Sept , Sucker Rod Pumping Workshop 20

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