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:
Jun. 12, 2018
Filed:
May. 29, 2015
Schlumberger Technology Corporation, Sugar Land, TX (US);
Tong Zhou, Sugar Land, TX (US);
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Abstract
A method for determining hydrogen index includes using measurements of gamma rays detected during operation of a pulsed neutron source and numbers of thermal neutron capture gamma rays made at at least two different axial spacings from a pulsed neutron source. Either a first ratio of or a first logarithm of the first ratio of the burst gamma rays is determined for a first and second axial distance from the neutron source. A second logarithm is determined of a second ratio of the thermal neutron capture gamma rays detected at a first axial spacing with respect to the numbers detected at a second axial spacing. A corrected second ratio of the numbers of thermal neutron capture gamma rays is determined using either (i) the first logarithm and (ii) the first ratio, and the second logarithm. The corrected second ratio is used to determine the hydrogen index.