The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 2025
Filed:
Jan. 10, 2024
China Petroleum & Chemical Corporation, Beijing, CN;
Sheng Zhan, Houston, TX (US);
Jeremy Zhang, Houston, TX (US);
CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing, CN;
Abstract
A method for obtaining elemental concentration and determining the formation density uses a tool having multiple dual-function detectors that can detect both neutrons and gamma rays simultaneously. The method includes emitting neutrons into the formation, detecting neutron and gamma ray signals from the formation and discriminating the neutron signal and the gamma ray signal, obtaining the space, time and energy dependent fluence rates for fast neutrons and thermal neutrons, obtaining gamma ray energy spectra from initial inelastic gamma rays and backscattered inelastic gamma rays from one or more detectors. The formation density can be calculated based on one or more ratios between the gamma ray count rates at the one or more detectors to the gamma ray count rate at the near detector.