Hostname: page-component-848d4c4894-5nwft Total loading time: 0 Render date: 2024-05-22T09:57:26.298Z Has data issue: false hasContentIssue false
  • English
  • Français

Deep burial diagenesis and reservoir quality along the eastern flank of the Viking Graben. Evidence for illitization and quartz cementation after hydrocarbon emplacement

Published online by Cambridge University Press:  09 July 2018

R. E. A. Midtbø ,
J. M. Rykkje  and
M. Ramm
R. E. A. Midtbø*
Affiliation:
Norsk Hydro Research Centre, N-5020 Bergen
J. M. Rykkje
Affiliation:
Norsk Hydro Research Centre, N-5020 Bergen
M. Ramm
Affiliation:
Norsk Hydro Technology and Competence, N-1321 Stabekk, Norway
*
*E-mail: ruth.elin.midtbo@hydro.com
Get access Rights & Permissions [Opens in a new window]

Abstract

The Tarbert Formation on a north±south oriented structure along the eastern flank of the Viking Graben has been studied. The reservoir in the two wells studied is buried ~100 m deeper in the northern than in the southern well. The present reservoir temperature is ~130°C. The reservoir quality is good, but due to extensive illitization of kaolin, the northern well shows lower permeability values than the southern well, for similar porosity values. The initial composition of the analysed samples in the two wells is very similar. There are no significant differences in total clay content and both wells contain K-feldspars and kaolin. However, the diagenetic alteration is more advanced in the deeper well. Total porosity is about the same in both wells but, due to illitization, the ratio of micro- vs. macro-porosity is higher in the deeper well. Petroleum emplacement in the structure occurred in two phases: oil emplacement predates, whereas gas emplacement postdates, most of the quartz cementation. In the deeper well, illitization occurred after gas emplacement.

Keywords

burial diagenesisreservoir qualityTarbert Formationhydrocarbon emplacementViking Graben
Type
Research Article
Information
Clay Minerals , Volume 35 , Issue 1 , March 2000 , pp. 227 - 237
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Aplin, A.C., Macleod, G., Larter, S.R., Pedersen, K.S., Sorensen, H. & Booth, H. (1999) Combined use of confocal laser scanning microscopy and PVT simulation for estimating the composition and physical properties of petroleum in fluid inclusions. Marine Petrol. Geol. 16, 16–97.CrossRefGoogle Scholar
Bjørlykke, K., Ramm, M. & Saigal, G.C. (1989) Sandstone diagenesis and porosity modification during basin evolution. Geol. Runds. 78, 78–243.Google Scholar
Bjørlykke, K., Nedkvitne, T., Ramm, M. & Saigal, G.C. (1992) Diagenetie processes in the Brent Group (Middle Jurassic) reservoirs of the North Sea–an overview. Pp. 265–289 in: Geology of the Brent Group (Morton, A.C., Hazeldine, R.S., Giles, M.R. & Brown, S., editors). Geological Society, London, Spec. Publ. 61.Google Scholar
Bjørlykke, K., Aagaard, P., Dypvik, H., Hastings, D.S. & Harper, A.S. (1986) Diagenesis and reservoir properties of Jurassic sandstones from the Haltenbanken area, offshore Mid Norway. Pp 275–386 in: Habitat of Hydrocarbons on the Norwegian Continental Shelf (Spencer, A.M., Holter, E., Campell, C.J., Hanslien, S.H., Nelson, P.H.H., Nysarther, E. & Ormaasen, E.G., editors). Graham & Trotman, London.Google Scholar
Ehrenberg, S.N. (1990) Relationship between diagenesis and reservoir quality in sandstones of the Garn Formation. Haltenbanken, Mid-Norwegian continental shelf. Am. Assoc. Petrol. Geol. Bull. 74, 74–1538.Google Scholar
Ehrenberg, S.N & Boassen, T. (1993) Factors controlling permeability variation of the Garn Formation in Trestakk field, Norwegian continental shelf. J. Sed. Pet. 63, 63–929.Google Scholar
Ehrenberg, S.N. & Nadeau, P.H. (1989) Formation of diagenetie illite in sandstones of the Garn Formation, Haltenbanken area, Mid Norwegian continental shelf. Clay Miner. 24, 24–233.Google Scholar
Pettijohn, F.J., Potter, P.E. & Siever, R. (1987) Sand and Sandstone. Springer-Verlag, Berlin.CrossRefGoogle Scholar
Pittman, E.D. & Larese, R.E. (1991) Compaction of lithic sands: Experimental results and applications. Am. Assoc. Petrol. Geol. Bull. 75, 75–1279.Google Scholar
Ramm, M. & Ryseth, A.E. (1996) Reservoir quality and burial diagenesis in the Statfjord Formation, North Sea. Petrol. Geosci. 2, 2–313.Google Scholar
Roedder, E. & Bodnar, R.J. (1980) Geologic pressure determinations from fluid inclusion studies. Ann. Rev. Earth. Planet. Sci. 8, 8–263.Google Scholar
Walderhaug, O. (1994) Temperatures of quartz cementation in Jurassic sandstones from the Norwegian continental shelf–evidence from fluid inclusions. J. Sed. Pet. 64, 64–311.Google Scholar