Record Display for the EPA National Library Catalog


Main Title Determination of Hydraulic Conductivity and Porosity Logs in Wells with a Disturbed Annulus.
Author Taylor, K. ; Molz, F. ;
CORP Author Nevada Univ. System, Reno. Desert Research Inst. ;Auburn Univ., AL.;Environmental Monitoring Systems Lab., Las Vegas, NV.
Publisher c1990
Year Published 1990
Report Number EPA-R-812713; EPA/600/J-90/299;
Stock Number PB91-146530
Additional Subjects Porosity ; Ground water ; Hydraulic conductivity ; Formation tests ; Contamination ; Electrical prospecting ; Transport properties ; Well tests ; Well logging ; Reservoir engineering ; Electrical conductivity ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB91-146530 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 17p
A method is developed to determine the Hydraulic conductivity and porosity of the formation surrounding a well as a function of depth. An electrically anomalous fluid is injected into a fully screened well and the radius of invasion is determined by induction logging. The radius of invasion is determined at several times so that the rate of invasion and the hydraulic head required to inject the tracer, a hydraulic conductivity log can be calculated. A porosity log can be obtained using Archie's rule and a model of formation electrical conductivity that accounts for the influence of the electrical conductivity of the formation matrix. The logs calculated by this method are insensitive to near-hole drilling disturbances. Field trials demonstrate that the results of the method agree well with other methods. (Copyright (c) 1990 Elsevier Science Publishers B.V.)