Patent ID: 11906692
Assignee: CHINA PETROLEUM & CHEMICAL CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  E | IPC E  G

Claim 0:
1. A nuclear logging tool, comprising:
a housing, two or more neutron sources, one or more shields, and two or more detectors disposed about the housing,
wherein the two or more neutron sources include a first neutron source and a second neutron source, each configured to generate neutrons in pulses or continuously and each of the two or more detectors is operable to detect neutrons and gamma rays,
wherein the two or more detectors include a first detector disposed at a first distance from a first neutron source and a second detector disposed at a second distance from the first neutron source, wherein the first distance is shorter than the second distance,
wherein each of the first distance and the second distance is in a longitudinal direction of the housing, and
wherein each shield is operable to absorb neutrons and gamma rays and is disposed inside the housing between one of the two or more neutron sources and one of the two or more detectors,
wherein the second neutron source is spaced away from the first neutron source in the longitudinal direction of the housing, and the two or more detectors are disposed between the first neutron source and the second neutron source.