Phongpiyah Klinmanee and Helmut Dürrast

pp. 433 - 444

Abstract

In Thailand the Department of Groundwater Resources is drilling to find vital aquifers. Sometimes groundwater formations cannot be identified clearly during drilling; therefore, geophysical logging was applied after drilling and before casing.
The tool used here is measuring nine parameters in one run, natural gamma ray, spontaneous potential, single point resistance, normal resistivity (AM 8’’, 16’’, 32’’, and 64’’), mud temperature and resistivity. Cutting was used to support the geophysical interpretations. In many cases the groundwater bearing zones could be clearly identified. The combination of and
the possibility choosing from nine parameters measured provided the necessary data base to identify groundwater bearing
zones in different environments. It has been demonstrated that in different wells different tools are favorable than others.
Based on the conclusions of this study geophysical logging in groundwater exploration is recommended as a normal
standard technique that should be applied in every new well drilled.