Leak off

{
  "id": "MLC-T-OAG-002140",
  "term": "Leak off",
  "field": "Oil and gas",
  "definition": "To intentionally increase the pressure in a wellbore to determine the fracture pressure of the open-hole formation immediately below the casing shoe. The procedure, known as a leak-off test (LOT), involves pumping fluid into the sealed well and plotting pressure against volume until the pressure deviates from a straight line. This deviation point indicates the pressure at which the formation begins to accept fluid.",
  "subject": "Drilling",
  "url": "https://mlchart.com/terminology/oil-and-gas/leak-off/"
}