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- W2155762012 abstract "In situ water-quality measurements, with respect to various ion and dissolved solids concentrations, have been closely approximated using open-hole borehole geophysical logs. Analyses have shown good correlation between water resistivity (Rw, as determined from the logs) and dominant ion concentrations sampled from a wide range of water quality in Tertiary carbonate and granular formations. Rw can be accurately determined by cross-plotting saturated formation resistivity (Ro), obtained from normal or lateral resistivity logs, against formation bulk porosity from neutron, density, or acoustic velocity logs. Plotting these data on Hingle Resistivity-Porosity Cross Plot (RPCP) paper with the proper matrix cementation factor (m, commonly 1.4 for unconsolidated sands or 1.6 for noncompacted Tertiary carbonates), will yield a graphical solution for Rw based upon the relationship Rw=φm Ro. The graphical technique also provides information concerning water-quality variations with depth, true matric resistivity, location of confining beds, and vertical changes in formation porosity. Once Rw has been determined, other ion concentrations can be estimated based upon chemical analyses of water samples from adjacent wells tapping a similar type water mass (i.e., calcium-bicarbonate, sodium-chloride water, etc.). Total dissolved solids (TDS), chloride, sulfate, potassium, sodium, magnesium, and hardness (as CaCO3) concentrations have consistently shown a high correlation with Rw." @default.
- W2155762012 created "2016-06-24" @default.
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- W2155762012 date "1986-01-01" @default.
- W2155762012 modified "2023-09-25" @default.
- W2155762012 title "The Use of Geophysical Logs for Determining Formation Water Quality" @default.
- W2155762012 cites W177965584 @default.
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- W2155762012 doi "https://doi.org/10.1111/j.1745-6584.1986.tb01453.x" @default.
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