These events are a great opportunity to network with others who are wrestling with the

same challenges in the same areas. With so many peers representing different disciplines and different companies, these events are good value

from the presentations, service providers, and delegate contacts that can be made.

O P T I M I Z I N G W E L L E C O N O M I C S T H R O U G H P R O D U CT I O N T E C H N I Q U E S

Stephen HarphamVP Engineering Dorado E&P

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Interview Continues On Page 2...

As conference chair, who are you looking forward to engaging with and interacting with?Definitely the interaction with knowledgeable and experienced colleagues who are all addressing the challenges that the Woodford presents to us is what I am looking forward to most. All in attendance have experiences and learnings from the Woodford to share. These include the speakers who will be presenting their stories, vendors who are developing and providing critical services and solutions, and of course all the delegates working with the Woodford and pushing up the learning curve.

What projects related to artificial lift & production optimization are you currently working on at Dorado E&P?Dorado is focused in the Updip Stack area and shallow shelf areas of Kingfisher, Logan, Noble surrounding counties. This is a relatively less gassy area with lower GORs in the 2000-8000 SCF/bbl range. It tends to have higher oil cuts then some other areas. Most lift applications in the area are either ESP or gas lift. Our efforts have been centered around determining which one of these lift applications is the most appropriate and responding to changing production conditions both early on and also after the initial flush production has ended.

You have been a participant at ABC events in the past, what makes you keep returning?Good question. This will be the 4th time I have chaired an ABC event and I am really looking forward to this one. These events are a great opportunity to network with others who are wrestling with the same challenges in the same areas. I have made several connections which resulted in not only sharing of information during the congress, but also in follow-up calls and meetings after the event. With so many peers representing different disciplines and different companies, these events are a good vaule from the presentations, service providers, and delegate contacts that can be made.

What do you see as the key artificial lift challenges being faced in the Woodford at the moment? How can this event deliver solutions to these challenges?Considering the many different areas of the play, artificial lift is a big challenge in the Woodford. In this play with a wide range of Gas to liquid ratios, the GLR is one of the biggest considerations for lift design. A

August 27-28, 2014 | Oklahoma City | Oklahoma

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combination of GLR and total fluid volume drives the specific well or area toward a lift solution or possibly two. Almost all forms of artificial lift are being employed in this play so there will be a diversity of experiences being shared among the participants. Whether your interest lies in the Cana, Scoop, Stack, Arkoma or the Updip Stack areas, this event will provide opportunities for you to learn about artificial lift solutions.

What are the key drivers for production optimization to help make the Woodford Shale Play work better?This cuts right to the heart of the challenges we face in the play. I believe production optimization starts long before the well is even drilled with the most important factor

being where the stake is placed. In a temporal order, the key drivers are:1) Locate the well in the sweetest spot possible 2) Target the lateral in the best stratigraphic interval so that the stimulation can better contact the reserves available3) Design the well appropriately to anticipate the full productive life cycle a) Wellbore trajectories with back builds, appropriate build rates, tangents, straight laterals, etc b) Decide about drilling toe up or toe down, many believe this makes a big difference c) Casing program to accommodate lift plan with appropriate diameters and liner top depths

d) Choose Plug and Perf vs external packers and sleeves systems as appropriate4) Design stimulation elements with production in mind such as tailing in with resin coated proppant5) Appropriate initial lift method selection based on expected total volumes, gas liquid ratio etc. Lift methods will likely change over time so it is important to anticipate potentially different mid-life and later-life of well lift systems6) Adequate monitoring of lift operational parameters is critical a) Down hole sensors on ESPs b) Gathering of basic operational data such as daily pressures, volumes, rates, run times etc. c) Scada systems provide more frequent data and real time

alerts to changes in conditions which can help keep pumps running and prevent premature failures by seeing how the pumps operate within a day such as gas surging.7) ESP pumps can be operated in different modes that when matched with the appropriate well conditions can optimize production, keep downtime to a minimum and extend well life.8) Develop a life of well lift plan early to be prepared for any failures. When the system inevitably fails, the plan can be implemented quickly. The plan should have triggers such total fluid and gas to liquid ratio levels that would prescribe which system and what size pump to run.

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