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Artificial Lift Techbook 2016

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ARTIFICIAL LIFT TECHBOOK: TECHNOLOGY EPmag.com | May 2016 | 27 prior to any install. ESP application designs should be interrelated with a thought-through control strategy. The customer's ground-level desires and abilities must be incorporated into the design and the control strategy." Halliburton has used this approach to more than double average run times where more conventional strategies were failing. Better control, better data The move to automation is resulting in operators and service companies having much more remote control over their felds. Steve Seale, director of soft- ware and automation at Weatherford, described the basic "digital oilfeld" setup. "We kind of view the structure for the digital oil feld in three different layers," he said. "One, you have a set of equipment at the well site that's collecting real-time information and doing control. Depending on the artifcial lift technique employed, it's going to have a different set of equipment. "That information feeds into the customer's SCADA system, and meanwhile the customer is doing management of the feld, managing down - time, trying to keep the wells operational, etc., in some type of data center." Weatherford has a set of lift optimization modules that couple the real-time data and allow the engineers to do nodal analysis with the infor- mation, he added. This is referred to the "analy- sis workbench," and the company has a different workbench for each type of lift. Seale said that the analytics space is really twofold, involving not only an engineering perspective but an IT perspective in terms of predicting well behavior. On top of this is an asset management view of things, more of a business perspective for manag- ing the asset. This is managed through Weather- ford's Intelligent Daily Operations. "By the time it gets to the desktop, there's typically some type of human interaction to ana- lyze the situation," he said. "But more and more analytics are being pushed out to the controller or the field devices. Even the well models, tech- niques that traditionally have been done with a desktop nodal analysis tool, are being pushed to the controller." Rod pumps Rod pumps are probably the most widely used form of artifcial lift and are beneftting from the new technologies. Seale said that some operators have saved up to $6 million a year by optimizing their rod pump operations. This is partly being driven by the use of variable frequency drives (VFDs). l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l 3,000 2,500 2,000 1,500 1,000 500 0 Oil Production (bbl/d) Lean Sigma credited expansion with $15 million annual impact 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Month Better use of Available resources by turning entire Area Optimization On Platform Oil production with optimizer Platform Oil production without optimizer Optimizer gain Real client data demon- strate that fully employing automation and optimi- zation tech- nologies can almost fatten decline curves. (Data courtesy of Emerson) Results, Analysis and Impact

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