1887

Abstract

Summary

Rocks are complex media that may contain very different geometries of pores. The two extreme families are the spherical pores, making up most of the total porosity, and the thin elongated micro cracks, controlling most of the rock elastic response. While the two families may exist in crustal rocks, they were found to be present in most sandstones. Using a technique to induce a set amount of micro cracks (thermal cracking) in a target rock, the purpose of this work is to investigate the relative effects of the porosity populations on the elastic and transport properties. We will show that, while elastic properties are similarly affected for all studied rocks, a strong effect of the rock initial porosity is observed on the resulting transport property. Moreover, consistently with existing theories, transport properties are additionally affected by the opening of micro cracks, which depends on the temperature of treatment.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201800678
2018-06-11
2024-03-29
Loading full text...

Full text loading...

References

  1. Archie, G.E.
    (1952). Classification of carbonate reservoir rocks and petrophysical considerations. AAPG Bulletin, 36(2), 278–298.
    [Google Scholar]
  2. Bernabé, Y.
    (1991). Pore geometry and pressure dependence of the transport pproperties in sandstones. Geophysics, 56(0), 436–446.
    [Google Scholar]
  3. Bernabé, Y., Mok, U., & Evans, B.
    (2003). Permeability-porosity Relationships in Rocks Subjected to Various Evolution Processes. Pure and Applied Geophysics, 160(5), 937–960. https://doi.org/10.1007/PL00012574
    [Google Scholar]
  4. Bourbie, T., & Zinszner, B.
    (1985). Hydraulic and acoustic properties as a function of porosity in Fontainebleau sandstone. Journal of Geophysical Research: Solid Earth (1978–2012), 90(3\3), 11524–11532.
    [Google Scholar]
  5. David, C.
    (1993). Geometry of flow paths for fluid transport in rocks. Journal of Geophysical Research: Solid Earth, 98(37), 12267–12278. https://doi.org/10.1029/93JB00522
    [Google Scholar]
  6. Fredrich, J.T., & Wong, T.
    (1986). Micromechanics of Thermally Induced Cracking in Threee Crustal Rocks. Journal of Geophysical Research, 91(3\2), 743–764. https://doi.org/10.1029/JB091iB12pl2743
    [Google Scholar]
  7. Glover, P.W.J., Meredith, P.G., Sammonds, P.R., & Murrell, S.A.F.
    (1994). Ionic surface electrical conductivity in sandstone. Journal of Geophysical Research: Solid Earth (1978–2012), 99(B11), 21635–21650.
    [Google Scholar]
  8. Guéguen, Y., & Dienes, J.
    (1989). Transport Properties of Rocks from Statistics and Percolation. Mathematical Geology, 27(1), 1–13.
    [Google Scholar]
  9. Han, T., Best, A.I., Sothcott, J., & Macgregor, L.M.
    (2011). Pressure effects on the joint elastic-electrical properties of reservoir sandstones. Geophysical Prospecting, 59(3), 506–517. https://doi.org/10.llll/j.1365-2478.2010.00939.x
    [Google Scholar]
  10. Milsch, H., Blöcher, G., & Engelmann, S.
    (2008). The relationship between hydraulic and electrical transport properties in sandstones: An experimental evaluation of several scaling models. Earth and Planetary Science Letters, 275(3–4), 355–363. https://doi.org/10.1016/j.epsl.2008.08.031
    [Google Scholar]
  11. Nasseri, M.H.B., Schubnel, A., & Young, R.P.
    (2007). Coupled evolutions of fracture toughness and elastic wave velocities at high crack density in thermally treated Westerly granite. International Journal of Rock Mechanics and Mining Sciences, 44(4), 601–616. https://doi.org/10.1016/j.ijrmms.2006.09.008
    [Google Scholar]
  12. Pimienta, L., Sarout, J., Esteban, L., David, C., & Clennell, M.B.
    (2017). Pressure-Dependent Elastic and Transport Properties of Porous and Permeable Rocks: Microstructural Control. Journal of Geophysical Research: Solid Earth, https://doi.org/10.1002/2017JB014464
    [Google Scholar]
  13. Pimienta, L., Fortin, J., & Guéguen, Y.
    (2014). Investigation of elastic weakening in limestone and sandstone samples from moisture adsorption. Geophysical Journal International, 199(1). https://doi.org/10.1093/gji/ggu257
    [Google Scholar]
  14. (2015). Bulk modulus dispersion and attenuation in sandstones. Geophysics, 80(2).
    [Google Scholar]
  15. Pimienta, L., Fortin, J., Borgomano, J.V.M., & Guéguen, Y.
    (2016). Dispersions and attenuations in a fully saturated sandstone: Experimental evidence for fluid flows at different scales. Leading Edge, 35(6). https://doi.org/10.1190/tle35060495.l
    [Google Scholar]
  16. Violay, M., Pezard, P.A., Ildefonse, B., Belghoul, A., & Laverne, C.
    (2010). Petrophysical properties of the root zone of sheeted dikes in the ocean crust: A case study from Hole ODP/IODP 1256D, Eastern Equatorial Pacific. Tectonophysics, 493(1–2), 139–152. https://doi.org/10.1016/j.tecto.2010.07.013
    [Google Scholar]
  17. Wang, X.Q., Schubnel, A., Fortin, J., Guéguen, Y., & Ge, H.K.
    (2013). Physical properties and brittle strength of thermally cracked granite under confinement. Journal of Geophysical Research: Solid Earth, 118(12), 6099–6112. https://doi.org/10.1002/2013JB010340
    [Google Scholar]
  18. Wyllie, M.R.J., Gregory, A.R., & Gardner, G.H.F.
    (1958). An experimental investigation of factors affecting elastic wave velocities in porous media. Geophysics, XXIII(3), 459–493.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201800678
Loading
/content/papers/10.3997/2214-4609.201800678
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error