Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Prediction of Well Development Possibilities in Delaware by Means of Calibrated Gamma-Ray Logs.
Author Woodruf, Kenneth D. ;
CORP Author Delaware Geological Survey, Newark.
Year Published 1973
Report Number DI-14-31-0001-3808; OWRR-A-023-DEL; 01106,; A-023-DEL(1)
Stock Number PB-225 120
Additional Subjects ( Water wells ; Well logging) ; Delaware ; Gamma counters ; Clays ; Water prospecting ; Geophysical prospecting ; Cores ; Tests ; Aquifers ;
Library Call Number Additional Info Location Last
NTIS  PB-225 120 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 23p
Small amounts of clay within sandy Coastal Plain sediments of northern Delaware often hinder successful well development. Clays usually show relatively higher gamma radiation than do sands. Thus it was thought that gamma radiation logging techniques could be refined to determine the amount of clay within a given depth interval and thus predict the chances for successful well development. Test holes were augered to various depths in selected formations and cores were taken every five feet. A gamma log was run through the hollow stem augers in the completed hole and again in the open hole after the augers were pulled. The output of the gamma probe was calibrated in counts per second. The core samples were analyzed for clay percentages and the clay percentages compared against the gamma readings for the corresponding depths.