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Abstract

Summary

Changing mudrock permeability in sedimentary basins affects fluid migration, consolidation rates and overpressure generation. However, obtaining quality specimens to measure the permeability of mudrocks is costly and difficult. To solve this dilemma, we measure the permeability anisotropy and resistivity anisotropy of resedimented mudrocks in the laboratory. We find that the permeability anisotropy of mechanically compressed Resedimented Boston Blue Clay (RBBC) mudrock increases from 1.2 to 1.9 as the applied stress increases from 0.4 to 10 MPa and the porosity decreases from 0.5 to 0.36. Further increases in applied stress result in a decrease in permeability anisotropy, likely due to the progressive cutoff of horizontal flow paths under an axial stress regime. Resistivity measurements reveal that the electrical conductivity anisotropy follows the same trend, indicating that the conductivity anisotropy is directly proportional to the permeability anisotropy of uniform RBBC.

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/content/papers/10.3997/2214-4609.20140016
2014-04-06
2024-04-26

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References

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Permeability and Resistivity Anisotropy of Resedimented Boston Blue Clay
Conference Proceedings 2014, 1 (2014); https://doi.org/10.3997/2214-4609.20140016
/content/papers/10.3997/2214-4609.20140016
/content/papers/10.3997/2214-4609.20140016
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