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US 2013/0211724 A1Published application
Identification of neutron capture from a pulsed neutron logging tool
AssigneeSchlumberger Technology Corporation
InventorsJohn B. Fitzgerald, Kenneth E. Stephenson
Life of this patent
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Abstract
The present disclosure is intended to overcome the problem of hydrogen contamination of the density signal. The approach is to compute the neutron capture portion of the total gamma ray counts and subtract it from the total counts resulting in a pure inelastic gamma ray measurement.
Claims12
A method, comprising:
- disposing a logging tool in a borehole in a formation, the logging tool comprising a pulsed neutron source, and a gamma-ray detector configured to detect counts of inelastic gamma-rays that form when neutrons are inelastically scattered by the formation;
- emitting a burst of neutrons into the formation with the pulsed neutron source;
- and
- determining an epithermal neutron capture count for the burst.
1 more element
Dependencies are inferred from the claim text.