MEASUREMENT OF FLOWING WATER SALINITY WITHIN OR BEHIND WELLBORE CASING

摘要

Water flowing within or behind a wellbore casing is irradiated with 14 MeV neutrons. Gamma radiation from the isotope nitrogen 16 induced from the O16(n,p) N16 reaction and either the Na23(n, alpha )F20 or the Cl37(n, alpha )p34 reaction is measured in intensity and energy with detectors in a downhole sonde. From the gamma radiation measurements, the salinity of water flowing either within or behind wellbore casing may be determined.