公开(公告)号：US12025767B2

公开(公告)日：2024-07-02

申请号：US16972022

申请日：2019-06-03

Applicant: Schlumberger Technology Corporation

Inventor： James Anthony Grau ,  Jeffrey Miles ,  Laurent Mosse

IPC: G01N23/222 ,  E21B47/003 ,  E21B47/113 ,  E21B49/08 ,  G01V5/10 ,  G01V5/22

CPC classification number: G01V5/101 ,  E21B47/003 ,  E21B47/114 ,  E21B49/0875 ,  G01N23/222 ,  G01V5/234

Abstract: An earth formation traversed by a borehole is investigated. A borehole tool having a neutron source and a photon detector is located in the borehole and used to obtain photon scatter information in or about the borehole. A chemical element located in a region in or about the borehole is quantified by using the photon scatter information and at least two different spectral standards for that element.