Premium
Successful Sampling Strategy Advances Laboratory Studies of NMR Logging in Unconsolidated Aquifers
Author(s) -
Behroozmand Ahmad A.,
Knight Rosemary,
MüllerPetke Mike,
Auken Esben,
Barfod Adrian A. S.,
Ferré Ty P. A.,
Vilhelmsen Troels N.,
Johnson Carole D.,
Christiansen Anders V.
Publication year - 2017
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2017gl074999
Subject(s) - aquifer , well logging , logging , drilling fluid , geology , groundwater , environmental science , hydraulic conductivity , formation evaluation , sampling (signal processing) , petroleum engineering , soil science , drilling , geotechnical engineering , soil water , materials science , engineering , ecology , filter (signal processing) , metallurgy , biology , electrical engineering
The nuclear magnetic resonance (NMR) technique has become popular in groundwater studies because it responds directly to the presence and mobility of water in a porous medium. There is a need to conduct laboratory experiments to aid in the development of NMR hydraulic conductivity models, as is typically done in the petroleum industry. However, the challenge has been obtaining high‐quality laboratory samples from unconsolidated aquifers. At a study site in Denmark, we employed sonic drilling, which minimizes the disturbance of the surrounding material, and extracted twelve 7.6 cm diameter samples for laboratory measurements. We present a detailed comparison of the acquired laboratory and logging NMR data. The agreement observed between the laboratory and logging data suggests that the methodologies proposed in this study provide good conditions for studying NMR measurements of unconsolidated near‐surface aquifers. Finally, we show how laboratory sample size and condition impact the NMR measurements.