CPC G01V 5/102 (2013.01) [E21B 47/12 (2013.01); G01V 5/104 (2013.01)] | 16 Claims |
1. A method for identifying cement in a cased wellbore in a geological formation, wherein the cased wellbore includes at least one casing, the method comprising:
emitting neutrons using a downhole tool, wherein the neutrons interact with a particular material via inelastic scattering, inelastic neutron reactions, capture of neutrons, neutron activation, or any combination thereof, through one of these reactions and cause the particular material to emit an energy spectrum of gamma rays;
detecting, at a first location, a first energy spectrum of the gamma rays that is specific to at least one of the plurality of elements; and
determining a presence of cement at the first location based at least in part on the first energy spectrum.
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