Quartz cementation inhibited by crestal oil charge; Miller deep water sandstone, UK North Sea

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doi: 10.1180/000985500546585
Authors:Marchand, A. M. E.; Haszeldine, R. S.; Macaulay, C. I.; Swennen, R.; Fallick, A. E.
Author Affiliations:Primary:
Katholieke Universiteit Leuven, Fysico-Chemische Geologie, Heverlee, Belgium
University of Edinburgh, United Kingdom
Scottish Universities Research and Reactor Centre, United Kingdom
Volume Title:Mineral diagenesis and reservoir quality, the way forward
Volume Authors:Bain, D. C., editor; Hall, P. L.; Shaw, H. F.; Spears, D. A.
Source:Clay Minerals, 35(1), p.201-210; Sixth Cambridge conference on Mineral diagenesis and reservoir quality, the way forward, Cambridge, United Kingdom, March 26-27, 1998, 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:2000
Note:In English. 32 refs.; illus., incl. 1 table
Summary:In the Miller Field, diagenetic quartz abundance, isotopic compositions and salinities of quartz-cementing fluids display a distinct pattern which is related to the structural depth of the reservoir sandstones. Quartz cement volumes increase from the crest of the field (average 6.0±1.5%) towards the flanks of the field (average 13.2±2.1%) and directly reduce reservoir porosity. By integrating petrographic observations with results of fluid inclusion measurements and O isotope analyses of diagenetic quartz, the pattern of quartz cementation is seen to be related to the reservoir filling history. Oil filled the crest of the reservoir first and prevented extensive quartz cementation. At greater depth in the reservoir oil zone, quartz overgrowths continued to precipitate until inhibited by the developing oil column. Oxygen isotope compositions of diagenetic quartz imply that quartz cement continued to precipitate in the water zone of the reservoir up to the present day.
Sections:Clay minerals
Subsections:Petrology; weathering; soils
Subjects:Cementation; Clastic rocks; Deep-water environment; Diagenesis; Framework silicates; Offshore; Petroleum; Petroleum exploration; Quartz; Reservoir rocks; Sandstone; Sedimentary rocks; Silica minerals; Silicates; Atlantic Ocean; Europe; North Atlantic; North Sea; United Kingdom; Western Europe; Miller Field
Abstract Numbers:01M/125
Record ID:2000057294
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute.
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