Tracer Test in Fractured Chalk

Chalk tracer test study

A parameter identifiability study of two chalk tracer tests S. A. Mathias, A. P. Butler, T. C. Atkinson , S. Kachi, and R. S. Ward Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, UK Department of Earth Sciences, University College London, London WC1E 6BT, UK School of Environmental Sciences, University of East Anglia, Norwich NR4 7TU, UK now at: Insti...

Tracer transport in a fractured chalk: X-ray CT characterization and digital-image-based (DIB) simulation

A digital-image-based simulation methodology is applied to evaluate the influence of heterogeneous porosity on the evolution of tracer concentrations in imaged tracer tests. Maps of computed tomography (CT)-number are calibrated relative to average porosity, and then thresholded to define porosity maps. These data are then used to automate the distribution of parameters within a finite element ...

The Mass Compressibili'iy of Fractured Chalk

Lattice Boltzmann modeling for tracer test analysis in a fractured Gneiss aquifer

Fractured Gneiss aquifers present a challenge to hydrogeologists because of their geological complexity. Interpretation methods which can be applied to porous media cannot be applied to fractured Gneiss aquifers because flow and transport occur in fractures, joints, and conduits. In contrast, the rock matrix contribution to groundwater flow is not very important in Gneiss aquifers. Sodium chlor...

Field tracer-transport tests in unsaturated fractured tuff.

This paper presents the results of a field investigation in the unsaturated, fractured welded tuff within the Exploratory Studies Facility (ESF) at Yucca Mountain, NV. This investigation included a series of tests during which tracer-laced water was released into a high-permeability zone within a horizontal injection borehole. The tracer concentration was monitored in the seepage collected in a...