Patent ID: 11906690
Assignee: BAKER HUGHES OILFIELD OPERATIONS LLC
Field: Measurement (Instruments)
Classification: CPC E  G | IPC G

Claim 12:
13. A system for conducting measurement operations for measuring properties of a formation or well structure, the system comprising:
a neutron measurement device forming at least a portion of a downhole tool string, the neutron measurement device operable to generate measurement data for detecting a wellbore characteristic, wherein the neutron measurement device comprises:
a neutron generation unit operable to emit neutrons toward a target;
a detector unit fixed relative to the neutron generator and operable to detect gamma rays from the target;
a microprocessor; and
memory including instructions that, when executed by the microprocessor, cause the system to:
receive a first measurement of gamma rays from the formation or well structure via a detector during a first period of time;
receive a second measurement of gamma rays from the formation or well structure via the detector during a second period of time;
remove the second measurement from the first measurement to produce an inelastic spectrum;
determine a spectral slope from the inelastic spectrum;
determine a scaling factor based on the spectral slope;
determine a spectral shape associated with the detector;
determine a detector-induced spectrum by applying the scaling factor to the spectral shape; and
remove the detector-induced spectrum from the inelastic spectrum to produce a clean inelastic spectrum for use in evaluating properties of the formation or well structure.