Reservoir diagenesis and hydrocarbon migration under hydrostatic palaeopressure conditions

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Authors:Swarbrick, R. E.
Author Affiliations:Primary:
University of Durham, Department of Geological Sciences, Durham, United Kingdom
Volume Title:Issue devoted to papers read at a conference on Diagenesis, overpressure and reservoir quality
Volume Authors:Bain, D. C., editor; Hall, P. L.; Shaw, H. F.; Spears, D. A.
Source:Clay Minerals, 29(4), p.463-473; Diagenesis, overpessure and reservoir quality, Cambridge, United Kingdom, March 26, 1993, edited by D. C. Bain, P. L. Hall, H. F. Shaw and D. A. Spears. Publisher: Mineralogical Society, London, United Kingdom. ISSN: 0009-8558
Publication Date:1994
Note:In English. 34 refs.; illus.
Summary:Fluid inclusion studies from two contrasting fields in the Northern North Sea reveal hydrostatic pressure conditions during the formation of secondary quartz overgrowths which trapped both brine and petroleum inclusions. In these fields, dating of authigenic illite, part of the diagenetic sequence and broadly coeval with quartz cementation, permits comparison with modelled pressure conditions. Pressure modelling indicates the likelihood of several periods of overpressure in the past, interspersed with normal pressure. The timing of diagenesis coincides with one of these periods of hydrostatic pressure. Furthermore, as both fields are now highly overpressured, the cause and timing of overpressure generation post-date the diagenesis. A model is proposed to link the pressure history and diagenesis.
Subjects:Burial diagenesis; Cementation; Diagenesis; Hydrocarbons; Jurassic; Mesozoic; Middle Jurassic; Migration; Oil and gas fields; Organic compounds; Overpressure; Permeability; Petroleum; Pore pressure; Pressure; Reservoir rocks; Atlantic Ocean; East Shetland Basin; North Atlantic; North Sea; Viking Graben; Alwyn Field; Hutton Field
Coordinates:N600000 N620000 W0030000 W0030000
Abstract Numbers:95M/3621
Record ID:1995025456
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland
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