Well logging methods in groundwater surveys of complicated aquifer systems: Bohemian Cretaceous Basin

Characterisation of fractured carbonate aquifers using ambient borehole dilution tests

“…Improved interpretation is possible when combined with data from image and caliper logs (Kobr, 2003;Maurice et al, 2010). Tsang et al (1990), Kobr (2003), , Doughty et al (2008), Datel et al (2009) and Maldaner et al (2018) found good agreement between single borehole dilution interpretations and those from other single borehole characterisation methods like core logging, packer and slug testing, flow logging and conventional geophysical logging.…”

Evaluating Flow Distribution in a Multiaquifer Recharge Well Using an In Situ Flowmeter

“…Down‐hole flowmeters provide for direct measurement of the flow distribution in pumping wells by obtaining a continuous profile of the cumulative inflow during pumping along the entire screened length of single‐screened wells (Gossell et al 1999; Newhouse et al 2005) and multiple‐screen wells (Hanson et al 2003). Datel et al (2009) describe geophysical logging as a useful practice to (1) identify crossflow and vertical flow in boreholes; (2) quantify permeability along an interval; and (3) identify leakage in test wells. Based on the study objective and flow sensitivity requirements, different types of borehole flowmeters are available for commercial use and research application, including impeller or spinner flowmeters, electromagnetic flowmeters, heat pulse flowmeters, acoustic Doppler flowmeters, and scanning colloidal borescope flowmeters (Hearst and Nelson 1985; Molz et al 1994; Guerin 2005).…”