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Mechanical Expansion of Steel Tubing as a Solution to Leaky Wellbores

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Radial flow permeability testing of an argillaceous limestone.

A P S Selvadurai¹, L Jenner

¹Civil Engineering and Applied Mechanics, McGill University, Montrea, QC, Canada. patrick.selvadurai@mcgill.ca

|April 12, 2012

Summary

Researchers measured the permeability of argillaceous Lindsay limestone, a key factor for nuclear waste storage in Ontario. Permeability tests using radial flow methods determined the rock

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Area of Science:

Geology
Hydrogeology
Nuclear Waste Management

Background:

The Lindsay limestone formation in Ontario is designated for deep geological repository construction for low to intermediate level nuclear waste.
Understanding the permeability of this argillaceous limestone is critical for predicting radionuclide migration within the geosphere.

Purpose of the Study:

To determine the permeability of the argillaceous Lindsay limestone using laboratory tests.
To assess the influence of permeability on long-term radionuclide transport from a nuclear waste repository.

Main Methods:

Employed both steady-state and transient radial flow laboratory tests.
Utilized analytical solutions and computational models for interpreting radial flow problems.
Compared experimental results with existing literature data for similar formations.

Main Results:

Permeability values for Lindsay limestone ranged from 1.0 × 10(-22) to 1.68 × 10(-19) m(2).
Results were obtained for radial flows along bedding planes under zero axial stress.
Factors influencing transient pulse tests and their interpretation were discussed.

Conclusions:

The study provides crucial permeability data for the Lindsay limestone, essential for nuclear waste repository safety assessments.
The findings contribute to understanding groundwater flow and contaminant transport in argillaceous rock formations.