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A Physically Based Approach for Estimating Hydraulic Conductivity from HPT Pressure and Flowrate
Author(s) -
Borden Robert C.,
Cha Ki Young,
Liu Gaisheng
Publication year - 2020
Publication title -
groundwater
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 94
eISSN - 1745-6584
pISSN - 0017-467X
DOI - 10.1111/gwat.13039
Subject(s) - hydraulic conductivity , conductivity , volumetric flow rate , permeability (electromagnetism) , work (physics) , mechanics , materials science , analytical chemistry (journal) , soil science , mathematics , chemistry , thermodynamics , physics , environmental science , chromatography , biochemistry , membrane , soil water
The hydraulic profiling tool (HPT) is widely used to generate profiles of relative permeability vs. depth. In this work, prior numerical modeling results are used to develop a relationship between probe advance rate V (cm/s), probe diameter D (cm), water injection rate Q (mL/min), corrected pressure P c (psi), and hydraulic conductivity K (feet/d) (1) K = E 0.1235VD 2 + 0.119 QP c − 1.017where E is an empirically derived hydraulic efficiency factor. The relationship is validated by 23 HPT profiles that, after averaging K vertically, were similar to slug test results in adjoining monitoring wells. The best fit value of E for these profiles was 2.02. This equation provides a physically based approach for generating hydraulic conductivity profiles with HPT tooling.