Identification of Facies Controlling Contaminant Migration
Client/Partner: US Geological Survey (USGS)
Location: Cape Cod, MA, USA
Overview: The migration of contaminant plumes can be strongly influenced by the presence and geometry low permeability facies. Javelin NMR logging measurements were collected in existing PVC cased wells at a contaminant research site. NMR Logging results showed that the aquifer was primarily comprised of sandy sediments with high-permeability, but also identified and delineated several low-permeability silt layers. These silt layers were confirmed by other methods and are likely to influence the transport of contaminants at the site.

Combination of Logging and Surface NMR with Short Dead Time
Client/Partner: Kansas Geological Survey and Stanford University
Location: Lawrence, KS
Overview: Logging and surface-based NMR measurements each carry distinct advantages for characterizing the near surface. Both surface-based GMR and down-hole Javelin logging measurements were collected at the well-characterized Geohydrologic Experimental and Monitoring Site. The two datasets not only accurately reflect the known subsurface structure, but are also remarkably consistent with one another. The short dead time of the GMR instrument enables detection of water in the unsaturated zone which is corroberated by results from the Javelin NMR log.