Using borehole logging to determine the liquid-phase efficient diffusion coefficient

Q.N. Pham, T.L. Tran, F. Larsen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingspeer-review

Abstract

Processes of solute transport in porous media consist of advection, diffusion, dispersion and retardation. Effective diffusion coefficient is always determined in the laboratory by taking undisturbed coring samples and using a special device. A new method of in-situ experiment has been developed by using borehole log associated with understanding geological evolution of the plain, this coefficient was determined through an analytical solution. Boreholes LK87 and LK88 in the Red river delta have been drilled for coring samples and borehole logging. Using laboratory experiment and in-situ experiment, at LK87 effective diffusion coefficients Dare 6.3E-10 and 2.80E-10, respectively. At LK88 effective diffusion coefficients Dare 3E-10 and 1.70E-10, respectively. The differences of in-situ experiment and laboratory experiment at the same borehole showed that the value of the coefficient is acceptable.

Original languageEnglish
Title of host publication4th Asia Pacific Meeting on Near Surface Geoscience and Engineering, NSGE 2021
PublisherEuropean Association of Geoscientists and Engineers
Number of pages7
ISBN (Electronic)978-171384504-1
DOIs
Publication statusPublished - 2021
Event4th Asia Pacific Meeting on Near Surface Geoscience and Engineering - Virtual, Online
Duration: 30 Nov 20212 Dec 2021
Conference number: 4

Conference

Conference4th Asia Pacific Meeting on Near Surface Geoscience and Engineering
Abbreviated titleNSGE 2021
CityVirtual, Online
Period30/11/212/12/21

Programme Area

  • Programme Area 2: Water Resources

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