Desert Research Institute: Wellbore Logging

Wellbore logging tool measures hydrophysical parameters

Project Summary
Location:
Reno, Nevada USA

Contributors:
Brad Lyles and Todd Mihevc, Desert Research Institute

Measured Parameters:
Temperature, electrical conductivity, dissolved oxygen, pH, specific ions

To overcome the difficulties associated with monitoring the hydrophysical properties of water in deep wells, researchers of the Desert Research Institute created the "chemtool." The chemtool, based around a CR10 data logger, consists of a stainless steel tube, which connects to a sensors bulkhead containing up to five sensors. The tool is lowered into wells on a standard four-conductor well-logging cable and has maximum depth of 1,050 m. Another data logger is used to monitor the depth of the tool. The two data loggers are time-synched so the chemtool and depth data can be integrated during post-processing. Data from the chemtool have been used to identify inflow/outflow and varying water quality zones.