• 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.

Groundwater logging with a Delta Epsilon well logging system is intuitive and easy to learn, equipment costs are reasonable and the information gained almost always increases the efficiency and effectiveness of groundwater exploration. Logging also assures good well design and construction.

With a fundamental understanding of log interpretation, borehole geophysical methods will yield valuable information that will almost always be worth the cost and effort involved.

The Borehole Logging Systems produced by Delta Epsilon Instruments have proven to be invaluable for quickly identifying fresh water producing formations from well logs. Well logging for groundwater exploration enables the driller or geologist to “see” the critical characteristics of a well that are unobtainable by any other methods.

Borehole Logging Data

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.

Commonly Used Probes For Groundwater Exploration and Water Well Development

GE-0809 Combination probes for the simultaneous recording of Gamma, Single Point Resistance. S.P. , Short and Long Normal Resistivities.

Fundamental to almost all groundwater logging is a combination gamma and electrical properties tool. All groundwater related logging systems should be equipped with this device. For a majority of our customers, this combination of measurements are all that is required to locate fresh water bearing formations, evaluate them for likely porosity and permeability as well as estimating water quality. The stratigraphy and lithology represented by these logs are also instructive in terms of well completion and development as a guide to locating the boundaries of water producing formations and the appropriate placement of casing and well screens.