Case Studies in Well ControlMore Illustrations on Well Control Abnormal Pressure Pore Pressure Uncertainty - IOGP NEWAbnormal formation pressure due to offset water injection wells - IOGP Higher than predicted pore pressure during completion operations - IOGP Fishing Wellbore flow observed during fishing of completion tubing string - IOGP Improper Procedures Improper mud treatment resulted in a Well Control incident - IOGPLack of management of change process, associated with late detection - International Association of Oil & Gas Producers (IOGP)Failure to recognize the influx leads to a large kick - IOGPGas Leak during Coil Tubing Operations - IOGPCirculation of gas through a Mud Gas Separator, beyond its capacity -IOGP Improper Isolation or Barrier Failure Kick while drilling underbalanced with poorly isolated tight formation behind casing - IOGPInflux observed during re-entry operations - IOGPInflux while drilling cemented shoe-track - IOGP Loss - Kick Situation Severe loss - kick situation in the reservoir sectionGas influx due to lost returns during 7” casing running - IOGP Managed Pressure Drilling Influx during MPD operations - IOGPWrong Operation of MPD Choke Results in Influx - IOGPWell Control Incidents whilst drilling a sensitive section on MPD mode - IOGPKick while using MPD due to RCD failure - IOGPLoss of surface back pressure during MPD operations - IOGPInflux while drilling the 6” hole section - IOGP Macondo Blow-out Macondo Well Incident Transocean Investigation Report
