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Geochemical Evidence for the History of Diagenesis and Fluid Migration: Brent Sandstone, Heather Field, North Sea

Published online by Cambridge University Press:  09 July 2018

J. R. Glasmann ,
P. D. Lundegard ,
R. A. Clark ,
B. K. Penny  and
I. D. Collins
J. R. Glasmann
Affiliation:
UNOCAL Science and Technology Division, P.O. Box 76, 376 S. Valencia Ave., Brea, California 9261, USA
P. D. Lundegard
Affiliation:
UNOCAL Science and Technology Division, P.O. Box 76, 376 S. Valencia Ave., Brea, California 9261, USA
R. A. Clark
Affiliation:
UNOCAL Science and Technology Division, P.O. Box 76, 376 S. Valencia Ave., Brea, California 9261, USA
B. K. Penny
Affiliation:
UNOCAL, Sunbury, UK
I. D. Collins
Affiliation:
UNOCAL, Sunbury, UK
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Abstract

The diagenesis of Brent Group sandstones at Heather Field was studied to reconstruct time-dependent variations in reservoir quality, hydrodynamic history, and oil emplacement. Depositional facies, isotopic and trace-element composition of authigenic minerals, and present-day formation-water chemistry indicate several major changes in porewater chemistry related to both gravitational and compactional flow systems that significantly impacted diagenesis. Early cementation by calcite was related to influx of meteoric water and completely occludes porosity in certain areas of the Field, especially in lower reservoir zones. Geochemical, petrographic, and structural evidence indicate that average calcite precipitated at low to moderate temperature from reducing isotopically-depleted water having high levels of radiogenic Sr (40°–50°C, δ18O = −4 to −6‰, 87Sr/86Sr > 0·71). A major period of kaolinite precipitation and feldspar dissolution followed calcite cementation. The isotopic composition of pore-filling kaolinite shows Field-wide uniformity (δ18O average 13·8‰, δD average −53·2‰), suggesting thorough flushing of the reservoir by meteoric water and precipitation at low to moderate temperature (45°–60°C). Tectonic, burial, and thermal histories suggest that meteoric flushing occurred during the late-Cimmerian sea-level low, possibly in response to gravitational flow of meteoric water from exposed parts of the adjacent East Shetlands Platform. Illite and quartz diagenesis post-date kaolinite cementation, with illite K-Ar ages indicating precipitation through much of the Paleogene (55–27 Ma), coincident with migration of hydrocarbons from neighbouring sub-basins of the East Shetlands Basin. Illite stable isotopic data indicate precipitation in a system resulting from partial mixing of trapped meteoric pore-fluids with saline compaction water. The intensity of sandstone diagenesis is influenced by differences in the fluid migration history, content of detrital K-feldspar, and the time of hydrocarbon emplacement and results in spatial and temporal variations in reservoir quality.

Type
Research Article
Information
Clay Minerals , Volume 24 , Issue 2 , June 1989 , pp. 255 - 284
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1989

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References

Barker, C.E. & Reynolds, T.J. (1984) Preparing doubly polished sections of temperature-sensitive sedimentary rocks. J. Sed. Petrol. 54, 635–636.CrossRefGoogle Scholar
Bigeleisen, J., Perlman, M.L. & Prosser, H.C. (1952) Conversion of hydrogenic materials to hydrogen for isotopic analysis. Anal. Chem. 24, 1356–1357.CrossRefGoogle Scholar
Bjorlykk, 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. Memoir 37.Google Scholar
Bjorlykke, K., Mo, A. & Palm, E. (1988) Modelling of thermal convection in sedimentary basins and its relevance to diagenetic reactions. Marine Petrol. Geol. 5, 338–351.CrossRefGoogle Scholar
Bjorlykke, K. & Brendsdal, A. (1968) Diagenesis of the Brent Sandstone in the StatQord Field, North Sea. Pp. 157–167 in: Roles of Organic Matter in Sediment Diagenesis (Gautier, D.L., editor). Soc. Econ. Paleon. Min. Spec. Pub. 38.Google Scholar
Bjorlykke, 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. 275–286 in: Habitat of Hydrocarbons on the Norwegian Continental Shelf. Norwegian Petroleum Society.Google Scholar
Bjorlykke, K., Malmo, O. & Elverhoi, A. (1979) Diagenesis in the Mesozoic sandstones from Spitsbergen and the North Sea. Geologisches Rundschau 68, 1151–1171.CrossRefGoogle Scholar
Blackbourn, G.A. (1984) Diagenetic history and reservoir quality of a Brent sand sequence. Clay Miner. 19, 377–389.CrossRefGoogle 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.CrossRefGoogle Scholar
Clayton, R.N., O'Neil, J.R. & Mayeda, T.K. (1972) Oxygen isotope exchange between quartz and water. J. Geophys. Res. 77, 3057–3067.Google Scholar
Clayton, R.N. & Mayeda, T.K. (1963) The use of bromine pentafluoride in the extraction of oxygen from oxides and silicates for isotopic analysis. Geochim. Cosmochim. Acta 27, 43–52.CrossRefGoogle Scholar
Curtis, C.D. (1978) Possible links between sandstone diagenesis and depth-related geochemical reactions occurring in enclosing mudstones. J. Geol. Soc. London 135, 107–117.CrossRefGoogle Scholar
Deegan, C.E. & Scull, B. J. (1977) A standard lithostratigraphic nomenclature for the central and northern North Sea. Rep. Inst. Geol. Sci. HMSO, London.Google Scholar
Dickson, J.A.D. (1965) A modified staining technique for carbonates in thin section. Nature 219, 587.CrossRefGoogle Scholar
Eslinger, E.V. (1971) Mineralogy and oxygen isotope ratios of hydrothermal and low-grade metamorphic argillaceous rocks.PhD Dissertation, Case Western Reserve University, Cleveland, Ohio, 205 pp.Google Scholar
Eslinger, E.V. & Savin, S.M. (1973) Mineralogy and oxygen isotope geochemistry of the hydrothermally altered rocks of the Ohaki-Broadiands, New Zealand geothermal area. Sci. 273, 240–267.Google Scholar
Falvey, D.A. & Middleton, M. F. (1981) Passive continental margins: evidence for a pre-breakup deep crustal metamorphic subsidence mechanism. Oceanologica Acta 4, 103–114.Google Scholar
Field, J.D. (1985) Organic geochemistry in exploration of the Northern North Sea. Pp. 39–57 in: Petroleum Geochemistry and Exploration of the Norwegian Shelf. Norwegian Petroleum Society.CrossRefGoogle Scholar
Folk, R.L. (1968). Petrology of Sedimentary Rocks. Hemphilfs Book Store, Austin, Texas. 170 pp.Google Scholar
Friedman, G.M. (1971) Staining. Pp. 511–521 in: Procedures in Sedimentary Petrology(Carver, R. E., editor). John Wiley & Sons, Inc., New York.Google Scholar
Friedman, I. & O'Neil, J.R. (1977) Compilation of stable isotope fractionation factors of geochemical interest. In: Data of Geochemistry., 6th ed (Fleischer, M., editor). U.S. Geol. Surv. Prof. Paper, 440 KK.Google Scholar
Glasmann, J.R. (1987) Comments on The evolution of illite to muscovite: mineralogical and isotopic data from the Glarus Alps, Switzerland. Contrib. Mineral. Petrol. 96, 72–74.CrossRefGoogle Scholar
Glasmann, J.R., Clark, R.A., Larter, S., Briedis, N.A. & Lundegard, P.D. (1989) Diagenesis in the Bergen High area, North Sea: relationships to hydrocarbon maturation and fluid flow. Am. Assoc. Petrol. Geol. Bull, (in press).Google Scholar
Glasmann, J.R. & Simonson, G.H. (1985) Alteration of basalt in soils of western Oregon. Soil Sci. Soc. Am. J. 49, 262–272.CrossRefGoogle Scholar
Goff, J.C. (1983) Hydrocarbon generation and migration from Jurassic source rocks in the E. Shetlands Basin and Viking Graben of the northern North Sea. J. Geol. Soc. London 140, 445–474.CrossRefGoogle Scholar
Hamilton, P.J., Blackbourn, G.A., McLachlan, W.A. & Fallick, A.E. (1987) Isotopic tracing of the provenance and diagenesis of Lower Brent Group sands. Pp. 939–949 in: Petroleum Geology of North West Europe (Brooks, J. & Glennie, K., editors). Graham and Trotman, London.Google Scholar
Hancock, N.J. & Taylor, A.M. (1978) Clay mineral diagenesis and oil migration in the Middle Jurassic Brent Sand Formation. J. Geol. Soc. London 135, 69–72.CrossRefGoogle Scholar
Haszeldine, R.S., Samson, I.M. & Cornford, C. (1984) Quartz diagenesis and convective fluid movement: Beatrice Oilfield, UK North Sea. Clay Miner. 19, 391–402.CrossRefGoogle Scholar
Huang, W.L., Bishop, A.M. & Brown, R.W. (1986) The effect of fluid/rock ratio on feldspar dissolution and illite formation under reservoir conditions. Clay Miner. 21, 585–602.CrossRefGoogle Scholar
Jackson, M.L. (1979) Soii Chemical Analysis-Advanced Course' 2nd edition' 11th printing.Published by the author, Madison, WI 53705, USA.Google Scholar
Johns, C.R. & Andrews, I. J. (1985) The petroleum geology of the Unst Basin, North Sea. Marine & Petroleum Geology 2, 361–372.CrossRefGoogle Scholar
Jourdan, A., Thomas, M., Brevart, O., Robson, P., Sommer, F. & Sullivan, M. (1987) Diagenesis as the control of the Brent sandstone reservoir properties in the greater Alwyn area (East Shetlands Basin). Pp. 951–961 in: Petroleum Geology of North Western Europe(Brooks, J. & Glennie, K., editors). Graham and Trotman, London.Google Scholar
Lambert, S.J. & Epstein, S. (1980) Stable isotope investigations of an active geothermal system in Valles Caldera, Jemez Mountains, New Mexico. J. Volcanol Geotherm. Res. 8, 111–129.CrossRefGoogle Scholar
Land, L.S. (1983) The application of stable isotopes to studies of the origin of dolomite and to problems of diagenesis of clastic sediments. Chapter 4 in: Stable Isotopes in Sedimentary Geology (Arthur, M. A., organizer), SEPM Short Course No. 10.Google Scholar
Lee, M., Aronson, J.L. & Savin, S.M. (1985) K-Ar dating of time of gas emplacement in Rotliegendes Sandstone, Netherlands. Ann. Assoc. Petrol Geol. Bull. 69, 1381–1385.Google Scholar
Liewig, N., Clauer, N. & Sommer, F. (1987) Rb-Sr and K-Ar dating of day diagenesis in Jurassic sandstone oil reservoir, North Sea. Am. Assoc. Petrol. Geol 71, 1467–1474.Google Scholar
Lindgreen, H. (1985) Diagenesis and primary migration in Upper Jurassic claystone source rocks in North Sea. Am. Assoc. Petrol. Geol. 69, 525–536.Google Scholar
McCrea, J.M. (1950) On the isotopic chemistry of carbonates and a paleotemperature scale. J Chem. Phys. 18, 849–857.CrossRefGoogle Scholar
McHardy, W.J., Wilson, M.J. & Tait, J.M. (1982) Electron microscope and X-ray diffraction studies of filamentous illitic clay from sandstones of the Magnus Field. Clay Miner. 17, 23–39.Google Scholar
McKenzie, D. (1978) Some remarks on the development of sedimentary basins. Earth Planet. Set Lett. 40,25-32.Google Scholar
Nadeau, P.H. (1985) The physical dimensions of fundamental clay particles. Clay Miner, 20, 499–514.CrossRefGoogle Scholar
Nadeau, P.H., Tait, J.M., McHardy, W.J. & Wilson, M.J. (1984) Interstratified X-ray diffraction characteristics of physical mixtures of elementary clay particles. Clay Miner. 19, 67-76.Google Scholar
O'Neil, J.R. & Kharaka, Y.K. (1976) Hydrogen and oxygen isotope exchange reactions between clay minerals and water. Geochim. Cosmochim. Acta 40, 241–246.CrossRefGoogle Scholar
Perry, E.A. (1974) Diagenesis and the K-Ar dating of shales and clay minerals. Geol. Soc. Am. Bull. 85, 827–830.2.0.CO;2>CrossRefGoogle Scholar
Potter, R.W. (1977) Pressure corrections for fluid-inclusion homogenization temperatures based on the volumetric properties of the system NaCl-H20. J. Research U.S. Geol. Survey 5, 603–607.Google Scholar
Reynolds, R.C. (1980) Interstratified clay minerals. Pp. 249–304 in: Crystal Structures of Clay Minerals and Their X-ray Identification(Brindley, G. W. and G., Brown, editors). Mineralogical Society, London, Monograph 5.CrossRefGoogle Scholar
Ritter, U. (1984) The influence of time and temperature on vitrinite reflectance. Org. Geochem. 6, 473–480.CrossRefGoogle Scholar
Royden, L., Sclater, J.G. & Von Herzen, R.P. (1980) Continental margin subsidence and heat flow: important parameters in formation of petroleum hydrocarbons. Bull. Am. Assoc. Petrol. Geol. 64, 173–187.Google Scholar
Sclater, J.G. & Christie, P.A.F. (1980) Continental stretching: an explanation of the post-Mid-Cretaceous subsidence of the Central North Sea Basin. J. Geophys. Res. 85, 3711–3739.Google Scholar
Sommer, F. (1978) Diagenesis of Jurassic sandstones in the Viking Graben. J. Geol. Soc. London 135, 63–68.CrossRefGoogle Scholar
Steiger, R.H. & Jager, E. (1977) Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology. Earth Planet. Sci. Letters 36, 359–362.CrossRefGoogle Scholar
Theisen, A.A. & Harward, M.E. (1962) a paste method for the preparation of slides for clay mineral identification by X-ray diffraction. Soil Sci. Soc. Am. Proc. 26, 90–91.CrossRefGoogle Scholar
Thomas, M. (1986) Diagenetic sequences and K-Ar dating in Jurassic sandstones, central Viking Graben: Effects on reservoir properties. Clay Miner. 21, 695–710.CrossRefGoogle Scholar
Vail, P.R., Mitchum, R.M. & Todd, R.G. (1977) Eustatic model for the North Sea during the Mesozoic. Proc. Mesozoic Northern Sea Symposium, 1-35. Norwegian Petroleum Society Memoir 12.Google Scholar
Veizer, J. (1983) Chemical diagenesis of carbonates: theory and application of trace element technique. Chapter 3 in: Stable Isotopes in Sedimentary Geology(M. A. Arthur, organizer). SEPM Short Course No. 10.Google Scholar
Waples, D.W. (1980) Time and temperature in petroleum formation: application of Lopatin^ method to petroleum exploration. Am. Assoc. Petrol. Geol. Bull. 64, 916–926.Google Scholar
Yeh, H.-W. & Savin, S.M. (1977) Mechanism of burial metamorphism of argillaceous sediments: 3. O-isotope evidence. Geol. Soc. Am. Bull. 88, 1321–1330.2.0.CO;2>CrossRefGoogle Scholar
Ziegler, W.H. (1975) Outline of the geological history of the North Sea. Pp. 165–190 in: Petroleum and the Continental Shelf of Northwest Europe.Applied Science Publishers, Barking, UK.Google Scholar