Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-29T15:08:33.591Z Has data issue: false hasContentIssue false
  • English
  • Français

Diagenesis of a deeply buried sandstone reservoir: Hild Field, Northern North Sea

Published online by Cambridge University Press:  09 July 2018

A. Lønøy ,
J. Akselsen  and
K. Rønning
A. Lønøy
Affiliation:
Norsk Hydro Research Centre, PO Box 4313, N-5001 Bergen, Norway
J. Akselsen
Affiliation:
Norsk Hydro Research Centre, PO Box 4313, N-5001 Bergen, Norway
K. Rønning
Affiliation:
Norsk Hydro Research Centre, PO Box 4313, N-5001 Bergen, Norway
Get access Rights & Permissions [Opens in a new window]

Abstract

Calcite cementation and extensive dissolution of feldspar with formation of authigenic kaolinite, quartz cement and secondary porosity are the main diagenetic processes in the deeply buried Hild Field. Mineralogical and isotopic analyses, reservoir pressure and depositional environment suggest that these diagenetic processes occurred prior to burial at a depth of 1·5–2 km. The timing of the diagenetic sequence suggests that feldspar dissolution is related to meteoric water flow. Calcite occurs as an early diagenetic iron-poor cement, and as two types of later diagenetic (<120°C) ferroan calcite cements. The ferroan calcites are mainly an in situ dissolution-reprecipitation product of the early diagenetic phase. Extensive local dissolution of calcite was important for forming secondary porosity which is closely associated with a prominent ‘gas chimney’ in the area studied. A high CO2 content in the natural gases of the reservoir suggests that the solvent was carbonic acid formed from CO2 generated during thermal maturation of organic matter. Calcite dissolution probably occurred between 70° and 100°C.

Type
Research Article
Information
Clay Minerals , Volume 21 , Issue 4 , October 1986 , pp. 497 - 511
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1986

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

Bjørlykke, K. (1984) Formation of secondary porosity: How important is it?. Pp. 277–286 in: Clastic Diagenesis (McDonald, D. A. and Surdam, R. C., editors). Am. Assoc. Petrol. Geol. Mem. 37.Google Scholar
Bjørlykke, K. & Brendsdal, A. (in press) Diagenesis of the Brent sandstone in the Statfjord Field, North Sea. SEPM memoir. Google Scholar
Bjørlykke, K., Malm, O. & Elverhøi, A. (1979) Diagenesis in the Mesozoic sandstones from Spitsbergen and the North Sea―a comparison. Geologisches Rundschau 68, 1152–1171.Google Scholar
Blanche, J.B. & Whitaker, J.H.McD. (1978) Diagenesis of part of the Brent Sand Formation (middle Jurassic) of the Northern North Sea basin. J. Geol. Soc. London 135, 73–82.Google Scholar
Boles, J.R. & Johnson, K.S. (1984) Influence of mica surfaces on pore-water pH. Chem. Geol. 43, 303–317.Google Scholar
Carothers, W.W. & Kharaka, Y.K. (1980) Stable carbon isotopes of HCO3 − in off-field waters-implications for the origin of CO2 . Geochim. Cosmochim. Acta 44, 323–332.Google Scholar
Craig, H., Boato, G. & White, D.E. (1956) Isotopic geochemistry of thermal waters. Natl. Acad. Sci. Natl. Res. Counc., Pub. 400, 29–38.Google Scholar
Dickson, J.A.D. (1966) Carbonate identification and genesis as revealed by staining. J. Sed. Petrology, 36, 491–505.Google Scholar
Franks, S.G. & Forester, R.W. (1984) Relationships among secondary porosity, pore-fluid chemistry and carbon dioxide, Texas Gulf Coast. Pp. 63–79 in: Clastic Diagenesis (McDonald, D. A. and Surdam, R. C., editors). Am. Assoc. Petrol. Geol. Mem. 37.Google Scholar
Galloway, W.E. & Kaiser, W.R. (1980) Catahoula Formation of the Texas Coastal Plain: origin, geochemical evolution, and characteristics of uranium deposits. University of Texas Bureau of Economic Geology Report of Investigations 100, 81 pp.Google Scholar
Galloway, W.E., Hobday, D.K. & Magara, K. (1982) Frio Formation of the Texas Gulf Coastal Plain―depositional systems, structural framework, and hydrocarbon distribution. Am. Assoc. Petrol. Geol. Bull. 66, 649–688.Google Scholar
Glezen, W.H. & Lerche, I. (In press). The evolution of fractures due to excess pore pressure. J. Math. Geol. Google Scholar
Hancock, J.N. (1978) Diagenetic modelling in the middle Jurassic of the Brent sand of the Northern North Sea. Proc. European Offshore Petroleum Conference and Exhibition, SPE, Dallas, 275–280.Google Scholar
Hayes, J.B. (1979) Sandstone diagenesis—-the hole truth. Pp. 127–139 in: Aspects of Diagenesis (Scholle, P. A. and Schluger, P. R., editors). SEPM Spec. Pub. 26.Google Scholar
Hunt, J.M. (1979) Petroleum Geochemistry and Geology. W. H . Freeman Publishing Co., San Francisco. 617 pp.Google Scholar
Irwin, H., Curtis, C.D. & Coleman, M.L. (1977) Isotopic evidence of source of diagnostic carbonates formed during burial of organic-rich sediments. Nature, 269, 209–213.Google Scholar
Loucks, R.G., Bebout, D.G. & Galloway, W.E. (1977) Relationship of porosity formation and preservation to sandstone consolidation history—-Gulf Coast Lower Tertiary Frio Formation. Gulf Coast Assoc. of Geol. Soc. Trans. 27, 109–120.Google Scholar
Lønøy, A. (1985) Mineralogi/diagenese Troll-øst, status for 31/6-1, -3. Unpublished internal Norsk Hydro report, 17 pp.Google Scholar
Manheim, F.T. (1967) Evidence for submarine discharge of water on the Atlantic continental slope of southern United States, and suggestions for further research. N.Y. Acad. Sci. Trans. 11, 839–853.Google Scholar
Morton, A.C. & Humphereys, B. (1983) The petrology of Middle Jurassic sandstones from the Murchison field, North Sea. J. Petrol. Geol. 5, 245–260.Google Scholar
O'Neil, J.R., Clayton, R.N. & Mayeda, T.K. (1969) Oxygen isotope fractionation in divalent metal carbonates. J. Chem. Phys. 51, 5547.Google Scholar
Schmidt, V. & McDonald, D.A. (1979a) Texture and recognition of secondary porosity in sandstones. Pp. 209–225 in: Aspects of Diagenesis (Scholle, P. A. and Schluger, P. R., editors). SEPM Spec. Pub. 26.Google Scholar
Schmidt, V. & McDonald, D.A. (1979b) The role of secondary porosity in the course of sandstone diagenesis. Pp. 175–207 in: Aspects of Diagenesis (Scholle, P. A. and Schluger, P. R., editors). SEPM Spec. Pub. 26.Google Scholar
Shackleton, N.J. & Kennet, J.P. (1975) Palaeotemperature history of the Cenozoic and the initiation of Antarctic glaciation: oxygen and carbon isotopic analysis in DSDP sites 277, 179 and 281. In. Initial reports of the Deep Sea Drilling Project 24, 743–755.Google Scholar
Smith, A.G. & Briden, J.C. (1977) Mesozoic and Cenozoic Paleocontinental Maps. Cambridge University Press, 66 pp.Google Scholar
Surdam, R.C., Boese, S.W. & Crossey, L.J. (1984) The chemistry of secondary porosity. Pp. 127–149 in: Clastic Diagenesis (McDonald, D. A. and Surdam, R. C., editors). Am. Assoc. Petrol. Geol. Mem. 37.Google Scholar