Boost production from a depleted well
After more than 600 days in an increasingly gassy and depleted Permian
Basin well, a REDA ESP was suffering gas lock every 10 minutes.
Because of the advanced gas lock protection in its Instruct acquisition
and control unit, the ESP adjusted its operating parameters each time,
but the cycling meant the ESP delivered only about 32% of productive
time. Meanwhile, oil prices fell, and the small, independent operator
needed to improve profitability—fast.
Use ESP data to analyze flow rates and reservoir pressure
PCL production composite log service enables real-time production
flow rate analysis and helped the operator determine depletion rates
and reservoir pressure for the well. Although the analysis had some
uncertainty, engineers determined that an ESP downgrade would
significantly improve performance. However, a workover was not
Optimize variable speed drive (VSD) performance in real-time
Schlumberger domain experts recommended Lift IQ production
life cycle management service to analyze ESP trends and optimize
operational settings for the VSD.
Improve drawdown and ESP uptime
The data acquisition rate for the ESP was increased to 1 min, and
downhole and surface data trends were analyzed using Lift IQ service
domain expertise and workflows. New VSD settings were recommended
and, with operator approval, applied using the Lift IQ service remote
New ESP operation trends were analyzed and the VSD settings
optimized further. After one week of iterative cycles of analysis and
optimization, ESP uptime increased to 62% from 32%, which amounted
to a 94% improvement in productive time. After three weeks of further
iterations, uptime stabilized at 56%, and drawdown improved from
385 to 335 psi, with the pump intake pressure (PIP) later stabilizing
at 350 psi.
The operator continues to rely on Lift IQ services to manage the unstable
multiphase flow and maintain higher ESP uptime as depletion continues
and gas/oil ratio increases.