Baseline

{
  "id": "MLC-T-OAG-000288",
  "term": "Baseline",
  "field": "Oil and gas",
  "definition": "A reference measurement or survey conducted at an initial time, against which subsequent measurements are compared to detect changes. In time-lapse seismic (4D seismic), the baseline survey is the first acquisition, and later monitor surveys are compared to it to observe changes in reservoir properties. It establishes the initial state of a system for monitoring purposes.",
  "subject": "Geophysics",
  "url": "https://mlchart.com/terminology/oil-and-gas/baseline/"
}