Patent ID: 9588251
Date: 2017-03-07
CPC Classifications: G01T,G01V,G06K

Claim:
1. A method comprising: a processor receiving a histogram from an apparatus having: the histogram having: the processor determining that a first-peak channel (ChA with channel number CA, 1<A<N) represents a first peak in the histogram; the processor determining that ChA is associated with a known first-peak energy (EA); the processor determining that a second-peak channel (ChB with channel number CB, 1<B<N, A≠B) represents a second peak in the histogram; the processor determining that ChB is associated with a known second-peak energy (EB) having an energy of X-rays emitted by the tungsten shield as a result of the tungsten shield being irradiated by gamma rays from the source of gamma rays; the processor solving a system of equations for an energy scale, κ (having units of energy/channel), and a zero offset, E0, wherein: the processor using a function of EM, CM, κ, and E0 to identify features in the histogram, wherein EM is an energy associated with the Mth channel in the histogram, and CM is the channel number of the Mth channel (ChM) in the histogram; the processor using the identified features in the histogram to calculate a parameter of a formation around a well from which the histogram originated.