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- W2257218762 abstract "A recently developed neutron absorption cell measures the thermal neutron absorption cross sections of formation brines ($Sigma$ /sub w/). This is one of the parameters needed for interpreting pulsed neutron decay logs. Generally, $Sigma$/sub w/ is estimated for the salinity of the brine. Sometimes it can be measured in a large tank with a logging tool, but this requires several hundred gallons of the brine. With the neutron absorption cell, this measurement can be made on a sample as small as one gallon, with a precision of 0.1 percent, in less than 5 minutes. Seventeen brine samples from oil fields in the U. S. and Canada have been analyzed in the cell. The cross sections measured have been compared with cross sections calculated from chemical analyses. The analyses included atomic absorption measurements to determine the concentration of boron in the samples. In almost all cases, boron contributed a noticeable amount to the total absorption cross section. In one brine, over 8 percent of the cross section was attributed to boron. Sodium, chlorine, and the hydrogen in the water were the only other elements that contributed appreciably to the cross section. The calculated and measured cross sections agreed within the experimentalmore » errors of the chemical analyses. (auth)« less" @default.
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- W2257218762 date "1975-01-01" @default.
- W2257218762 modified "2023-09-27" @default.
- W2257218762 title "Measuring thermal neutron absorption cross sections of formation brines" @default.
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