SPE Reservoir Evaluation & Engineering
Volume 16,
Number 1,
February 2013,
pp. 8-18
Summary
An integrated and quantitative approach is taken here to the Permo-Triassic
Kangan/Dalan carbonate formation. We apply pore-network characterization to the
problem of the classification of these complex carbonate gas-reservoir rocks.
We start with the useful and convenient nuclear-magnetic-resonance (NMR) data
on 28 samples to define NMR facies (NMRF). The NMRF grouping is performed with
both the relaxivity constant (ρ2) and the
specific-surface-volume (Sgv) data. Seven NMRF have been
defined with a combination of core/log NMR data, petrographic image analysis,
and mercury-injection examinations for two wells. The advantage of evaluation
of the pore spaces rather than grain properties is to discover trends that are
not apparent when one uses a conventional sedimentological facies definition.
Lithology-independent NMRF exhibit properties that are associated with pore
geometry. This should have special importance for the formation evaluation of
carbonates.
© 2013. Society of Petroleum Engineers
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History
- Original manuscript received:
12 March 2010
- Revised manuscript received:
28 June 2012
- Manuscript approved:
23 October 2012
- Published online:
25 January 2013
- Version of record:
27 February 2013
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