Deeper setting depth of slimline ESP system increases production 150%
An operator producing from the Wasatch formation in Utah set a 5-in., 18-lb. liner in a 7-in. cased well at 6,900 ft total vertical depth (TVD). Taking advantage of this thick source rock, the completion has a vertically perforated zone from 13,300 ft to 15,400 ft. To maximize production potential, the operator wanted to be able to set inside the liner close to the perforations but was reaching the depth limitations of some artificial lift system equipment and related capabilities.
Additionally, the well had a producing gasto-liquid ratio (GLR) of 500, and at the planned setting depth, the bottomhole temperature (BHT) was estimated to be around 230°F (110°C). With these conditions, the main challenges were passing an electrical submersible pumping (ESP) system through the liner to the desired setting depth and maintaining steady operations to reduce wear to the system at these elevated temperatures.
Baker Hughes, a GE company (BHGE), provided a CENtrilift™ PASS slimline ESP system solution for the operator. The system included a 338 series vortex gas separator and a tapered pump design with slimline multiphase (MVP™) stages and FLEXPump6 stages. This system was controlled using an Electrospeed Advantage™ variable speed drive operating in a PID amp control mode. Lastly, the cable was protected by using slimline ESP motor lead extension (MLE) protectors and a series of centralizers.
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- 5-in., 18-lb. liner set at around 6,900 ft in a 15,500 ft vertical well
- 500 GLR/1,000 GOR • 230°F (110°C) BHT at 12,200 ft setting depth
- 230°F (110°C) BHT at 12,200 ft setting depth
- High level of solids production
- 80% deeper pump setting depth and estimated 150% higher production than conventional ESP
- Steady operation in high-gas conditions
- Operator is planning to use slimline ESP systems on other applications