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WRRCTR No.80 Determining Porosity with Neutron Logs from Hawaiian Basaltic Aquifiers
|Title:||WRRCTR No.80 Determining Porosity with Neutron Logs from Hawaiian Basaltic Aquifiers|
|Authors:||Peterson, Frank L.|
Sehgal, Man Mohan
|LC Subject Headings:||Aquifers -- Hawaii.|
Basalt -- Hawaii.
Radiation well logging.
|Issue Date:||Aug 1974|
|Publisher:||Water Resources Research Center, University of Hawaii at Manoa|
|Citation:||Peterson FL, Sehgal MM. 1974. Determinig porosity with neutron logs from Hawaiian basaltic aquifiers. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 24.|
|Series/Report no.:||WRRC Technical Reports|
|Abstract:||Neutron count data for calibration purposes were collected by neutron logging in 4 boreholes, and porosity data were determined from photo logs run on the same 4 boreholes. A neutron count-porosity calibration curve was constructed and was found to take the form of the logarithm of neutron count versus porosity. The calibration curve was calculated by linear regression analysis, utilizing empirical field data. The calibration curve is valid within the expressed 95 percent confidence intervals only for neutron logs from (1) basaltic formations, (2) uncased hole8, and (3) borehole diameters from 20.32 to 30.48 cm (8 to 12 in.).|
|Sponsor:||OWRT Project No. A-034-HI, Grant Agreement No. 14-31-0001-3811 Supported in part by funds provided by the United States Department of the Interior as authorized under the Water Resources Act of 1964, Public Law 88-379.|
|Pages/Duration:||viii + 38 pages|
|Appears in Collections:||WRRC Technical Reports|
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