1887

Abstract

Summary

Porosity and pore connectivity in organic-rich shales change with thermal maturity. To document such effects, an immature source rock sample was artificially matured under controlled pressure conditions. Afterwards, its pore structure was compared to the one of an untreated sister sample. Pore space and pore connectivity were investigated by Broad Ion Beam (BIB) polishing and Scanning Electron Microscopy (SEM), Mercury Intrusion Porosimetry (MIP) and Wood’s Metal Injection (WMI) followed by BIB-SEM.

The SEM images of both samples show cracks indicating enhanced porosity. The organic matter of the matured sample exhibits porosity, however, the portion of identifiable organic matter is drastically lower than in the untreated sample. MIP indicates an increase of macro- and meso-porosity for the matured sample, which is consistent with the BIB-SEM observations. WMI at comparable pressures as MIP also reveals clear differences between the two samples: the untreated sample shows a complex heterogeneous intrusion of the Wood’s Metal (WM), filling the matrix for several hundreds of micrometers at various locations while other large parts of the matrix remain unfilled. In contrast, in the matured sample WM was identified throughout the entire sample demonstrating good connectivity.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201600390
2016-05-02
2021-10-27
Loading full text...

Full text loading...

References

  1. Klaver, J., Desbois, G., Urai, J.L., Littke, R.
    [2012] BIB-SEM study of the pore space morphology in early mature Posidonia Shale from the Hils area, Germany. International Journal of Coal Geology, 103, 12–25.
    [Google Scholar]
  2. Klaver, J., Hemes, S., Houben, M., Desbois, G., Radi, Z., Urai, J.L.
    [2015] The connectivity of pore space in mudstones: insights from high-pressure Wood’s metal injection, BIB-SEM imaging, and mercury intrusion porosimetry. Geofluids, 15(4), 577–591.
    [Google Scholar]
  3. Loucks, R.G., Reed, R.M., Ruppel, S.C., Jarvie, D.M.
    [2009] Morphology, Genesis, and Distribution of Nanometer-Scale Pores in Siliceous Mudstones of the Mississippian Barnett Shale. Journal of Sedimentary Research, 79(12), 848–861.
    [Google Scholar]
  4. Stockhausen, M.
    [2015] Experimental Simulation of Hydrocarbon Expulsion. Ph.D. thesis, Kiel University, http://macau.uni-kiel.de/receive/dissertation_diss_00017782
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201600390
Loading
/content/papers/10.3997/2214-4609.201600390
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