Patent Document ID: 20140138529
Application ID: 14118868
Patent Status: 0

Claim One:
1. A method for estimating an aspect of a formation using a nuclear spectroscopy tool, comprising: placing a nuclear spectroscopy tool including a neutron source and a gamma ray detector into a borehole; performing a plurality of environmental measurements; emitting neutrons from the nuclear spectroscopy tool such that some of the neutrons can generate gamma rays from a formation adjacent the nuclear spectroscopy tool and some of the neutrons can generate gamma rays from elements within the nuclear spectroscopy tool; detecting an energy spectrum of gamma rays induced by the emitted neutrons, the energy spectrum including a background having a plurality of measured spectral components; estimating a background ratio between at least one spectral component of the background and another measured spectral component in accordance with the plurality of environmental measurements; analyzing the detected gamma ray spectrum using a combination of standard spectra and subtracting at least one spectral component of the background in accordance with the background ratio; and estimating an aspect of the formation based on the analyzed spectrum.