Radius of investigation

{
  "id": "MLC-T-OAG-003041",
  "term": "Radius of investigation",
  "field": "Oil and gas",
  "definition": "The effective distance into the formation from the borehole wall from which a logging tool primarily receives its measurements. This radius varies significantly depending on the logging tool type, its operating frequency, and the formation properties. For example, shallow resistivity tools have a smaller radius of investigation than deep resistivity tools.",
  "subject": "Formation Evaluation",
  "url": "https://mlchart.com/terminology/oil-and-gas/radius-of-investigation/"
}