1887

Abstract

Summary

Compaction and evolution of rock properties of Cenozoic mudstones are investigated in the Quadrant 15, offshore Norway. The study area is a normally subsided basin located in the southern Viking Graben of the Norwegian North Sea. A suite of well log data from 41 exploration and appraisal wells is utilised to study the compaction behaviour of Cenozoic mudstones. The detailed petrophysical analyses suggest the occurrence of high quantities of smectite in the Eocene and Oligocene sediments, in general agreement with previous publications. The transition from mechanical to chemical compaction takes place between 70–90oC corresponding to depth 2–2.5 km. The geothermal gradient is higher in the south of the study area but, temperature alone is not sufficient to explain chemical diagenesis in the area. Initial mineralogy seems to be as important as temperature with respect to cementation. The degree of chemical compaction and cementation reflects the initial smectite content and the availability of potassium for the reaction of smectite to illite and quartz to take place. The overall results of this study contribute to delineate compaction processes controlled by geological processes (e.g. provenance and depositional environments) in a highly prosperous region in terms of hydrocarbon exploration and production.

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/content/papers/10.3997/2214-4609.20140034
2014-04-06
2024-03-29
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References

  1. Berstad, S. and Dypvik, H.
    [1982] Sedimentological evolution and natural radioactivity of Tertiary sediments from the Central North Sea. Journal of Petroleum Geology, 5, 77–88.
    [Google Scholar]
  2. Bjørlykke, K.
    [1998] Clay mineral diagenesis in sedimentary basins - a key to the prediction of rock properties. Examples from the North Sea Basin. The Mineralogical Society, 33, 15–34.
    [Google Scholar]
  3. Faleide, J.I., Kyrkjebo, R., Kjennerud, T., Gabrielsen, R., H., Jordt, H., Fanavoll, S. and Bjerke, M.D.
    [2002] Tectonic impact on sedimentary processes during Cenozoic evolution of the northern North Sea and surrounding areas, in Dore, A.G., CartwrightJ.A., Stoker, S.J., Turner, J.P. and White, N. (Eds.) Exhumation of the North Atlantic margin, timing, mechanisms and implications for petroleum exploration. Geological Society of London Special Publication, 196, 235–269.
    [Google Scholar]
  4. Fawad, M., Mondol, N.H., Jahren, J. and Bjørlykke, K.
    [2011] Mechanical compaction and ultrasonic velocity of sands with different texture and mineralogical composition. Geophysical Prospecting, 59, 697–720.
    [Google Scholar]
  5. Marcussen, Ø., Maast, T.E., Mondol, N.H., Jahren, J. and Bjørlykke, K.
    [2010] Changes in physical properties of a reservoir sandstone as a function of burial depth - The Etive Formation, northern North Sea. Marine and Petroleum Geology, 27, 1725–1735.
    [Google Scholar]
  6. Marcussen, Ø., Thyberg, B.I., Peltonen, C., Jahren, J., Bjørlykke, K. and Faleide, J., I.
    [2009] Physical properties of Cenozoic mudstones from the northern North Sea: Impact of clay mineralogy on compaction trends. AAPG Bulletin, 93, 127–150.
    [Google Scholar]
  7. Mondol, N.H., Bjørlykke, K., Jahren, J. and Hoeg, K.
    [2007] Experimental mechanical compaction of clay mineral aggregates: Changes in physical properties of mudstones during burial. Marine and Petroleum Geology, 24, 289–311.
    [Google Scholar]
  8. Mondol, N.H., Bjørlykke, K. and Jahren, J.
    [2008] Experimental compaction of clays: Relationship between permeability and petrophysical properties in mudstones. Petroleum Geoscience, 14, 1–19.
    [Google Scholar]
  9. Mondol, N.H.
    [2009] Porosity and permeability development in mechanically compacted silt-kaolinite mixtures. 79th SEG International Annual Meeting, Expanded Abstract, 2139.
    [Google Scholar]
  10. Nøttvedt, A., Gabrielsen, R.H. and Steel, R.J.
    [1995] Tectonostratigraphy and sedimentary architecture of rift basins, with reference to the northern North-Sea. Marine and Petroleum Geology, 12, 881–901.
    [Google Scholar]
  11. NPD (Norwegian Petroleum Directorate)
    [2013] Norwegian Petroleum Directorate fact pages and fact maps.
    [Google Scholar]
  12. Storvoll, V., Bjørlykke, K. and Mondol, N.H.
    [2005] Velocity-depth trends in Mesozoic and Cenozoic sediments from the Norwegian Shelf. AAPG Bulletin, 89, 359–381.
    [Google Scholar]
  13. Thyberg, B.I. and Jahren, J.
    [2011] Quartz cementation in mudstones: sheet-like quartz cement from clay mineral reactions during burial. Petroleum Geoscience, 17, 53–63.
    [Google Scholar]
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