MLchartDataset catalogue

Differential spectrum

Term · Oil and gas · MLC-T-OAG-001073

An NMR logging method for identifying fluids that subtracts the T2 distribution acquired with a short polarization time from one acquired with a long polarization time. Water, with a short T1, is fully polarized in both and cancels, while light oil and gas, with long T1 values, recover only at the long wait time and remain in the difference. The remaining signal is read as the hydrocarbon contribution.

Table 1. Record
IdentifierMLC-T-OAG-001073
FieldOil and gas
SubjectFormation Evaluation
Record as JSON 
{
  "id": "MLC-T-OAG-001073",
  "term": "Differential spectrum",
  "field": "Oil and gas",
  "definition": "An NMR logging method for identifying fluids that subtracts the T2 distribution acquired with a short polarization time from one acquired with a long polarization time. Water, with a short T1, is fully polarized in both and cancels, while light oil and gas, with long T1 values, recover only at the long wait time and remain in the difference. The remaining signal is read as the hydrocarbon contribution.",
  "subject": "Formation Evaluation",
  "url": "https://mlchart.com/terminology/oil-and-gas/differential-spectrum/"
}

Record 1,147 of 4,469 in Oil and gas terminology (MLC-0103). Request the full dataset.