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Title: NMR Logging to Estimate Hydraulic Conductivity in Unconsolidated Aquifers

Journal Article · · Ground Water
DOI:https://doi.org/10.1111/gwat.12324· OSTI ID:1400508
;  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8]
  1. Vista Clara Inc., 12201 Cyrus Way, Suite 104, Mukilteo, WA 98275, 425‐493‐8122,
  2. Kansas Geological Survey University of Kansas, Lawrence, KS 66047, (785) 864–2116,
  3. Vista Clara Inc., 12201 Cyrus Way, Suite 104, Mukilteo, WA, 98275,
  4. Kansas Geological Survey University of Kansas, Lawrence, KS 66047, (785) 864–2115,
  5. 1000 E. University Ave., Dept. 3006 University of Wyoming, Laramie, WY 82071, (307) 766–3603,
  6. Kansas Geological Survey University of Kansas, Lawrence, KS 66047, (785) 864–2173,
  7. Kansas Geological Survey University of Kansas Lawrence, KS 66047, (785) 864–2111,
  8. 6010 Canyonside Rd., La Crescenta, CA 91214, (818) 415–1913,
+ Show Author Affiliations

Abstract Nuclear magnetic resonance ( NMR ) logging provides a new means of estimating the hydraulic conductivity ( K ) of unconsolidated aquifers. The estimation of K from the measured NMR parameters can be performed using the Schlumberger‐Doll Research ( SDR ) equation, which is based on the Kozeny–Carman equation and initially developed for obtaining permeability from NMR logging in petroleum reservoirs. The SDR equation includes empirically determined constants. Decades of research for petroleum applications have resulted in standard values for these constants that can provide accurate estimates of permeability in consolidated formations. The question we asked: Can standard values for the constants be defined for hydrogeologic applications that would yield accurate estimates of K in unconsolidated aquifers? Working at 10 locations at three field sites in Kansas and Washington, USA, we acquired NMR and K data using direct‐push methods over a 10‐ to 20‐m depth interval in the shallow subsurface. Analysis of pairs of NMR and K data revealed that we could dramatically improve K estimates by replacing the standard petroleum constants with new constants, optimal for estimating K in the unconsolidated materials at the field sites. Most significant was the finding that there was little change in the SDR constants between sites. This suggests that we can define a new set of constants that can be used to obtain high resolution, cost‐effective estimates of K from NMR logging in unconsolidated aquifers. This significant result has the potential to change dramatically the approach to determining K for hydrogeologic applications.

Sponsoring Organization:
USDOE
OSTI ID:
1400508
Journal Information:
Ground Water, Journal Name: Ground Water Vol. 54 Journal Issue: 1; ISSN 0017-467X
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 37 works
Citation information provided by
Web of Science

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