Overbalance

{
  "id": "MLC-T-OAG-002655",
  "term": "Overbalance",
  "field": "Oil and gas",
  "definition": "A condition where the hydrostatic pressure exerted by the drilling fluid column in the wellbore is intentionally maintained at a level greater than the formation pore pressure. This pressure differential prevents formation fluids from flowing into the wellbore, maintaining well control. A typical overbalance pressure might be 100-300 psi above formation pressure.",
  "subject": "Drilling",
  "url": "https://mlchart.com/terminology/oil-and-gas/overbalance/"
}