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 datalogger, consists of a stainless-steel tube, which connects to a sensor 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 datalogger is used to monitor the depth of the tool. The two dataloggers are time-synced 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.

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Case Study Summary

Application

Wellbore logging tool measures hydrophysical parameters

Location

Reno, Nevada USA

Products Used

CR10 

Contributors

Brad Lyles and Todd Mihevc, Desert Research Institute

Measured Parameters

Temperature, electrical conductivity, dissolved oxygen, pH, specific ions