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1. (WO2018101903) DETERMINING A CHARACTERISTIC OF A MATERIAL SURROUNDING A WELLBORE BASED ON COUNT RATES OF SCATTERED PHOTONS

Pub. No.:    WO/2018/101903    International Application No.:    PCT/US2016/063903
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Wed Nov 30 00:59:59 CET 2016
IPC: E21B 47/00
G01V 5/04
G01V 5/12
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: HU, Yike
GUO, Weijun
Title: DETERMINING A CHARACTERISTIC OF A MATERIAL SURROUNDING A WELLBORE BASED ON COUNT RATES OF SCATTERED PHOTONS
Abstract:
A system and method to determine a characteristic of a wellbore based on count rates of scattered photons. The system and method can include determining at least one characteristic of a material surrounding a wellbore by, emitting photons from a photon source at a location in the wellbore, detecting, via one or more detectors, photons scattered by the material, counting the scattered photons based on an energy level, producing count rates of the detected photons for various energy ranges, and calculating a value of the characteristic based on the count rates. The material can be at least one of mud, mud cake, and earth formation.