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Javelin - NMR Borehole Logging Tool
Designed specifically for groundwater investigations, Javelin® borehole Magnetic Resonance (MR) logging tools provide the highest resolution characterization of aquifer properties possible. Capable of collecting data down to 1600m (5200ft), Javelin’s powerful permanent magnets polarize hydrogen nuclei of water molecules. Simultaneous multifrequency operation speeds up logging time while ensuring the sensitive zone is outside the zone disturbed by drilling.
High-Resolution in-situ characterization of hydrogeologic properties
- Bound and mobile water content
- Pore size distribution & porosity
- Hydraulic conductivity
- Transmissivity
Measure Hydrogeologic Properties Directly
Javelin® provides high-resolution measurement of volumetric fluid content in the native formation. It is directly sensitive to the pore size distribution, bound vs mobile fluid in porous space, and provides quantitative estimates of porosity and hydraulic conductivity.
Javelin® incorporates a Magnetic Resonance (MR)-based technology that uses the same physics as medical MRI. This technology provides inherently non-destructive detection of water, using static and alternating magnetic fields to polarize and excite hydrogens in the native formation fluids out past the annular space. The initial amplitude of the MR signal observed after this perturbation is linearly proportional to the volumetric fluid content, or porosity if the formation is saturated. MR relaxation times are strongly correlated with the size of the pore space and are used to distinguish between water bound in small pores from more mobile water in large pores and fractures.
All Javelin® borehole logging tools incorporate multi-frequency operation. This enhanced versatility enables it to see radially outward in multiple measurement shells during a single log. This multi-frequency capability, combined with Javelin®’s unique ability to operate below the commercial AM broadcast band, provides greatly increased immunity against electromagnetic interference and faster logging speeds than single- frequency-based MR tools.
Boasting a wide range of tool diameters, the Javelin® product family fits most any well or borehole size. Interchangeable lower probe sections enable flexible operations and reduce capital equipment costs
Javelin® Surface Station
The Javelin® surface station operates all Javelin® tools. It provides tool power, control, telemetry, and interfaces to depth encoder and tension sensors.
Javelin Software Performs
While in the field, see everything you need for your log with Javelin®’s full-featured professional data acquisition and analysis software. Focus on your project outcomes while the software performs real-time data processing, quality control, and interpretation of hydrogeological properties. Control all aspects of data analysis from acquisition to visualization, to final reporting. Results can be exported in standard formats including LAS and LAS-2.
