Depth of invasion

{
  "id": "MLC-T-OAG-001017",
  "term": "Depth of invasion",
  "field": "Oil and gas",
  "definition": "The radial distance that drilling fluid filtrate penetrates into a permeable formation from the borehole wall. This invasion creates a flushed zone and a transition zone, altering the original fluid saturations near the wellbore. The depth of invasion can range from a few inches to several feet, depending on formation properties and drilling conditions.",
  "subject": "Formation Evaluation",
  "url": "https://mlchart.com/terminology/oil-and-gas/depth-of-invasion/"
}