terms:api_unit
A unit of counting rate used for scaling gamma-ray logs and neutron logs.
(1) For gamma-ray curves. The difference in curve deflection between zones of low and high radiation in the API gamma-ray calibration pit is 200 API gamma-ray units. One two-hundredth of this deflection is one API gamma-ray unit.
(2) For neutron curves. The difference between electrical zero and the curve deflection opposite a zone of Indiana limestone (19% porosity) in the API neutron calibration pit is 1,000 API units. One one-thousandth of this deflection is one API neutron unit.
terms/api_unit.txt · Last modified: 2023/11/22 08:39 by 127.0.0.1