1. Gas-Lift Workshop Breakout Session
Gas-Lift for Unconventionals
Session Coordinator: Greg Stephenson
Title slide
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2. Breakout Session Details
Session Purpose - In this break-out session, we explored such issues as artificial lift selection, system design, well stability, flow assurance and when to transition from or to other lift methods.
Number of Attendees
Operating Companies 3
Service/Supply Companies 3
Others 3
Duration of Session: 1 hour
May 16 – 20, 2016
2016 Gas-Lift Workshop

3. Primary Discussion Points
Artificial Lift Selection
Criterion: deviation, back pressure, GLR, npv sensitivity, failure frequency, where we landed based on GOR; >1000 go to gas lift; handle sand and solid; Chemical injection; Depths, bottom drive system; GL can be used for the whole life; If you have electricity, you can use gl, can use engine without constriction; fluid compatibility; separation efficiency
May 16 – 20, 2016
2016 Gas-Lift Workshop

4. Primary Discussion Points
Gas-Lift System Design
When do you need to place well on gas-lift?
Slug mitigation by injecting gas at base of tubing.
Kick-off of flowing wells.
How much will you need to inject?
How do you know?
What do you want to do? Form follows function.
How many valves, mandrels?
Design is time dependent due to production change
Deep: figure out paths
May 16 – 20, 2016
2016 Gas-Lift Workshop

5. Primary Discussion Points
Challenges
Operators unfamiliar with gas-lift
Limited experienced slickline operators
Facilities need to be designed to handle slugs
Centralized vs. de-centralized compression facilities
Hydrates / gas freezing: mitigate with high discharge temp, properly sized downhole orifice / operating valve
Is a lower Pwf a good thing?
Pressure dependent permeability
Non-obvious IPR behavior
Compressor reliability
Should you run a packer or not?
May 16 – 20, 2016
2016 Gas-Lift Workshop

6. Primary Discussion Points
Transition to / from other lift methods
GLR, liquid rate, economics, gas utilization & operational challenges may drive a change in late life.
Need compatible surface equipment for early-life and late-life lift.
Early life completion probably not the same as late-life completion.
May 16 – 20, 2016
2016 Gas-Lift Workshop

7. Summary
Key Learnings – Unconventional resources will teach you humility. The more we know, the more we realize we don’t know.
Should This Session Be Repeated in the Future – Yes.
May 16 – 20, 2016
2016 Gas-Lift Workshop

8. 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 Gas-Lift Workshop, they grant to the Workshop and the Artificial Lift Research and Development Council (ALRDC), 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.
Other uses of this presentation are prohibited without the expressed written permission of the company(ies) and/or author(s) who own it and the Workshop Steering Committee.
May 16 – 20, 2016
2016 Gas-Lift Workshop

9. Disclaimer
The following disclaimer shall be included as the last page of a Technical Presentation or Continuing Education Course. A similar disclaimer is included on the front page of the Gas-Lift Web Site.
The Artificial Lift Research and Development Council and its officers and trustees, and the Gas-Lift Workshop Steering Committee members, and their supporting organizations and companies (here- in-after referred to as the Sponsoring Organizations), and the author(s) of this Technical Presentation or Continuing Education Training Course and their company(ies), provide this presentation and/or training material at the Gas-Lift Workshop "as is" without any warranty of any kind, express or implied, as to the accuracy of the information or the products or services referred to by any presenter (in so far as such warranties may be excluded under any relevant law) and these members and their companies will not be liable for unlawful actions and any losses or damage that may result from use of any presentation as a consequence of any inaccuracies in, or any omission from, the information which therein may be contained.
The views, opinions, and conclusions expressed in these presentations and/or training materials are those of the author and not necessarily those of the Sponsoring Organizations. The author is solely responsible for the content of the materials.
The Sponsoring Organizations cannot and do not warrant the accuracy of these documents beyond the source documents, although we do make every attempt to work from authoritative sources. The Sponsoring Organizations provide these presentations and/or training materials as a service. The Sponsoring Organizations make no representations or warranties, express or implied, with respect to the presentations and/or training materials, or any part thereof, including any warrantees of title, non-infringement of copyright or patent rights of others, merchantability, or fitness or suitability for any purpose.
May 16 – 20, 2016
2016 Gas-Lift Workshop