Title: Quantification of diagenesis impact on the reservoir properties of the Jurassic Arab D and C members (Offshore, U.A.E.)
Authors: Nader, Fadi Henri ×
De Boever, Eva
Gasparrini, Marta
Liberati, Monica
Dumont, C
Ceriani, A
Morad, Sadoon
Lerat, Olivier
Doligez, Brigitte #
Issue Date: Jun-2013
Publisher: Blackwell Science
Series Title: Geofluids vol:13 issue:2 pages:204-220
Abstract: An increasing need exists to quantify the impact of diagenesis on complex and heterogeneous geological reservoirs
and to predict the related field-scale porosity-permeability distribution. Development of approaches to quantify
diagenetic events is an important step towards the construction of integrated numerical reservoir models
predicting the impact of successive diagenetic events on petrophysical properties at various scales. This article
describes two distinct approaches, which allow capturing, quantifying and explaining reservoir heterogeneities of
the Jurassic Arab Formation (offshore oilfield in Abu Dhabi, U.A.E.) at the field and plug scale. Based on a classical
diagenesis study, whereby the major diagenetic phases were characterized, distribution patterns were highlighted
to further explain reservoir heterogeneities through a set of 2D interpolation diagenesis maps across the
field. The best reservoir properties are encountered in the central-northern (grainstones with syntaxial calcite
overgrowth cement – typical of Arab D) and south-western (dolostones – typical of Arab C) parts of the oilfield.
Following another independent approach at the scale of the plug, quantification of rock components and description
of the pore space connectivity and geometry are obtained by 2D and 3D image analyses, l-CT and pore
network modelling. This latter approach resulted in a better understanding of the effect of anhydrite dissolution
on the pore structure of the investigated dolostone. The overall, presented workflow provides valuable constraints
for assessing reservoir heterogeneities in statistical field-scale models.
ISSN: 1468-8115
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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