MLchartDataset catalogue

API unit

Term · Environment · MLC-T-ENV-001872

The American Petroleum Institute (API) has established test pits for calibrating neutron and gamma logs. The API neutron unit is defined as 1/1,000 of the difference between electrical zero and the logged value opposite the Indiana limestone in the calibration pit that has an average porosity of 19 percent. The API gamma unit is defined as 1/200 of the deflection between intervals of high and low radioactivity in the calibration pit.

Table 1. Record
IdentifierMLC-T-ENV-001872
FieldEnvironment
SubjectScience and research
ReferencesEnvironmental Geophysics Glossary
Record as JSON 
{
  "id": "MLC-T-ENV-001872",
  "term": "API unit",
  "field": "Environment",
  "definition": "The American Petroleum Institute (API) has established test pits for calibrating neutron and gamma logs. The API neutron unit is defined as 1/1,000 of the difference between electrical zero and the logged value opposite the Indiana limestone in the calibration pit that has an average porosity of 19 percent. The API gamma unit is defined as 1/200 of the deflection between intervals of high and low radioactivity in the calibration pit.",
  "subject": "Science and research",
  "references": [
    "Environmental Geophysics Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/api-unit/"
}

Record 1,872 of 30,736 in Environment terminology (MLC-0121). Request the full dataset.