1887
  1. Home
  2. Conferences
  3. Conference Proceedings
  4. 81st EAGE Conference and Exhibition 2019
  5. Conference paper

Abstract

Summary

Mechanical and chemical compaction are two fundamental processes that reduce the porosity of sedimentary rocks and affect reservoir quality. These processes can occur during burial and subsequent diagenesis, as well as during contact metamorphism. Although mechanical and chemical compaction have been studied extensively in diagenetic sedimentary systems, only limited studies have been carried out in the context of metamorphic rocks. Here, we show that as quartzite forms from sandstone during contact metamorphism, both mechanical and chemical compaction cause significant loss of porosity. Rocks sampled from the Inmar formation in Maktesh Ramon (Israel) - where quartzite formed near contacts with dykes - were analyzed with high resolution scanning electron microscopy and cathodoluminescence. Using image segmentation to differentiate between quartz cement and detrital grains, we observed both grain rearrangement and the brittle fracturing of grains near intrusive contacts. In the sample exhibiting the highest level of compaction, mechanical processes reduced porosity by 18 – 26%, while chemical compaction caused a reduction of 11 %. This result indicates that both mechanical and chemical processes can contribute to porosity reduction and the formation of barriers to fluid flow in sandstone reservoirs containing intrusive bodies.

© EAGE Publications BV
Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201900855
2019-06-03
2024-04-26

  • From This Site

    /content/papers/10.3997/2214-4609.201900855
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. Anovitz, L.M., Lynn, G.W., Cole, D.R., Rother, G., Allard, L.F., Hamilton, W.A., Porcar, L. and Kim, M.H.
    [2009] A new approach to quantification of metamorphism using ultra-small and small angle neutron scattering. Geochimica et Cosmochimica Acta, 73, 7303–7324.
     [Google Scholar]
  2. Emmanuel, S., Ague, J.J. and Walderhaug, O.
    [2010] Interfacial energy effects and the evolution of pore-size distributions during quartz precipitation in sandstone. Geochimica et Cosmochimica Acta, 74, 3539–3552.
     [Google Scholar]
  3. Fisher, Q.J., Casey, M., Clennell, M.B. and Knipe, R.J.
    [1999] Mechanical compaction of deeply buried sandstones of the North Sea. Marine and Petroleum Geology, 16, 605–618.
     [Google Scholar]
  4. Fjeldskaar, W., Helset, H.M., Johansen, H., Grunnaleite, I. and Horstad, I.
    [2008] Thermal modelling of magmatic intrusions in the Gjallar Ridge, Norwegian Sea: implications for vitrinite reflectance and hydrocarbon maturation. Basin Research, 20, 143–159.
     [Google Scholar]
  5. Gudmundsson, A. and Løtveit, I.F.
    [2012] Sills as fractured hydrocarbon reservoirs: examples and models. Geological Society, London, Special Publications, 374, SP374-5.
     [Google Scholar]
  6. Houseknecht, D.W.
    [1987] Assessing the relative importance of compaction processes and cementation to reduction of porosity in sandstones. AAPG Bulletin, 71, 633–642.
     [Google Scholar]
  7. Oelkers, E.H., Bjorkum, P.A. and Murphy, W.M.
    [1996] A petrographic and computational investigation of quartz cementation and porosity reduction in North Sea sandstones. American Journal of Science, 296, 420–452.
     [Google Scholar]
  8. Paxton, ST, Szabo, JO, Ajdukiewicz, JM, Klimentidis, RE
    (2002)Construction of an intergranular volume compaction curve for evaluating and predicting compaction and porosity loss in rigid-grain sandstone reservoirs. AAPG Bulletin, 86(12), 2047–2067.
     [Google Scholar]
  9. Schutter, S.R.
    [2003] Hydrocarbon occurrence and exploration in and around igneous rocks. Geological Society, London, Special Publications, 214, 7–33.
     [Google Scholar]
  10. Summer, N.S. and Ayalon, A.
    [1995] Dike intrusion into unconsolidated sandstone and the development of quartzite contact zones. Journal of Structural Geology, 17, 997–1010.
     [Google Scholar]
  11. Wang, L., Cheng, L.B., Cheng, Y.P., Yin, G.Z., Cai, C.C., Xu, C. and Jin, K.
    [2014] Thermal effects of magmatic sills on coal seam metamorphism and gas occurrence. Bulletin of Volcanology, 76, 1–16.
     [Google Scholar]
  12. Walderhaug, O. and Bjørkum, P.A.
    [2003] The effect of stylolite spacing on quartz cementation in the Lower Jurassic Stø Formation, southern Barents Sea. Journal of Sedimentary Research, 73, 146–156.
     [Google Scholar]
  13. Young, G.M.
    [2008] Origin of enigmatic structures: field and geochemical investigation of columnar joints in sandstones, Island of Bute, Scotland. Journal of Geology, 116, 527–536.
     [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201900855
Loading
Porosity Reduction During Contact Metamorphism in Sandstone Reservoirs
Conference Proceedings 2019, 1 (2019); https://doi.org/10.3997/2214-4609.201900855
/content/papers/10.3997/2214-4609.201900855
/content/papers/10.3997/2214-4609.201900855
Loading

Data & Media loading...

Most Cited This Month Most Cited RSS feed

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