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 ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-225 120 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
23p |
Abstract |
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. |