An Integrated Rock Typing Approach for Unraveling the Reservoir Heterogeneity of Tight Sands in the Whicher Range Field of Perth Basin, Western Australia

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  • Rahim Kadkhodaie Ilkhchi, Ferdowsi University of Mashhad, Iran
  • Reza Rezaee, Curtin University, Australien
  • Reza Moussavi Harami, Ferdowsi University of Mashhad, Iran
  • Henrik Friis
  • Ali Kadkhodaie Ilkhchi, University of Tabriz, Iran
Tight gas sands in Whicher Range Field of Perth Basin show large heterogeneity in reservoir characteristics
and production behavior related to depositional and diagenetic features. Diagenetic
events (compaction and cementation) have severely affected the pore system. In order to investigate
the petrophysical characteristics, reservoir sandstone facies were correlated with core porosity
and permeability and their equivalent well log responses to describe hydraulic flow units
and electrofacies, respectively. Thus, very tight, tight, and sub-tight sands were differentiated. To
reveal the relationship between pore system properties and depositional and diagenetic characteristics
in each sand type, reservoir rock types were extracted. The identified reservoir rock
types are in fact a reflection of internal reservoir heterogeneity related to pore system properties.
All reservoir rock types are characterized by a compacted fabric and cemented framework. But
distribution and dominance of diagenetic products in each of them depend on primary depositional
composition and texture. The results show that reservoir rock typing based on three aspects
of reservoir sandstones (depositional properties, diagenetic features and petrophysical
characteristics) is a suitable technique for depiction of reservoir heterogeneity, recognition of reservoir
units and identifying factors controlling reservoir quality of tight sandstones. This methodology
can be used for the other tight reservoirs.
OriginalsprogEngelsk
TidsskriftOpen Journal of Geology
Vol/bind4
Sider (fra-til)373-385
Antal sider13
ISSN2161-7570
DOI
StatusUdgivet - 20 aug. 2014

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