Slowness time coherence

{
  "id": "MLC-T-OAG-004450",
  "term": "Slowness time coherence",
  "field": "Oil and gas",
  "definition": "A processing method for full-waveform sonic log data that measures the similarity of waveforms across a receiver array for a range of possible slowness values. This technique generates a map of coherence versus slowness and time, where peaks indicate the arrival of coherent energy, such as compressional or shear waves. The output is a two-dimensional plot where the formation slowness is read from the location of the highest coherence peak, measured in microseconds per foot (μs/ft).",
  "subject": "Formation Evaluation",
  "url": "https://mlchart.com/terminology/oil-and-gas/slowness-time-coherence/"
}