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

Marchand, A.M.E., Haszeldine, R.S., Macaulay, C.I., Swennen, R., and Fallick, A.E. (2000) Quartz cementation inhibited by crestal oil charge: Miller deep water sandstone, UK North Sea. Clay Minerals, 35 (1). pp. 201-210. ISSN 0009-8558 (doi:10.1180/000985500546585)

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Publisher's URL: http://dx.doi.org/10.1180/000985500546585

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.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s):Fallick, Prof Anthony
Authors: Marchand, A.M.E., Haszeldine, R.S., Macaulay, C.I., Swennen, R., and Fallick, A.E.
Subjects:Q Science > QE Geology
College/School:College of Science and Engineering > Scottish Universities Environmental Research Centre
Journal Name:Clay Minerals
ISSN:0009-8558

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