Title: Quartz cementation inhibited by crestal oil charge: Miller deep water sandstone, UK North Sea
Authors: Marchand, AME
Haszeldine, RS
Macaulay, CI
Swennen, Rudy
Fallick, AE #
Issue Date: Mar-2000
Publisher: Mineralogical society
Series Title: Clay minerals vol:35 issue:1 pages:201-210
Abstract: 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. Qual iz 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 filing 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.
ISSN: 0009-8558
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Geology
# (joint) last author

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