Borehole Logging for Groundwater Exploration and Development

The Borehole Logging Systems produced by Delta Epsilon Instruments have proved invaluable for quickly and accurately determining fresh water producing formations from borehole logs. Borehole logging enables the driller or geologist/geophysicist to “see” the critical characteristics of a potential well that are unobtainable by other methods. Borehole loggers from Delta Epsilon equipped with a basic combination gamma and electric logging probe positively identify fresh water formations, precisely delineate their thickness, and reveal the undesirable intrusion of clay lenses or brackish water.

These characteristics can only be determined through borehole logging and cannot be predicted from one well to the next. A borehole logging system from Delta Epsilon obtained the data shown below from a site in Texas using a GE- 9409 combination gamma and electric logging tool. Borehole data permitted the geologist to determine the well on the right had significant potential to be a productive water well. In contrast, the log on the left from a nearby adjacent well revealed this well was less promising, and, as a result, this well was not completed.