Injectivity in the Surat basin, Queensland, Australia: likelihood and uncertainty evaluation

Garnett, A., Hurter, S., Marmin, N., Probst, P., Gonzalez, S. and Guiton, S. (2013). Injectivity in the Surat basin, Queensland, Australia: likelihood and uncertainty evaluation. In: Tim Dixon and Kanji Yamaji, GHGT 2012. 11th International Conference on Greenhouse Gas Control Technologies (GHGT 2012), Kyoto, Japan, (3747-3754). 18-22 November 2012. doi:10.1016/j.egypro.2013.06.270

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Author Garnett, A.
Hurter, S.
Marmin, N.
Probst, P.
Gonzalez, S.
Guiton, S.
Title of paper Injectivity in the Surat basin, Queensland, Australia: likelihood and uncertainty evaluation
Conference name 11th International Conference on Greenhouse Gas Control Technologies (GHGT 2012)
Conference location Kyoto, Japan
Conference dates 18-22 November 2012
Proceedings title GHGT 2012   Check publisher's open access policy
Journal name Energy Procedia   Check publisher's open access policy
Place of Publication Amsterdam, The Netherlands
Publisher Elsevier
Publication Year 2013
Sub-type Fully published paper
DOI 10.1016/j.egypro.2013.06.270
Open Access Status DOI
ISSN 1876-6102
Editor Tim Dixon
Kanji Yamaji
Volume 37
Start page 3747
End page 3754
Total pages 8
Collection year 2014
Language eng
Formatted Abstract/Summary
In the context of pre-tenement application studies, Monte Carlo simulations of steady state (initial) CO2 injectivity for the Precipice Sandstone in the Surat Basin have been used together with discrete dynamic models to assess injection rate uncertainty. Such uncertainty analyses are used to guide exploration work programs. This paper considers an analysis of steady state injection rates based on a modified form of Darcy's Law, using parameter probability probability density functions (PDF) for 4 different tenement areas. Uncertainty in absolute permeability and upscaled permeability (as seen in an injection well) typically accounted for around 70% of variation in estimated steady-state injectivity. Uncertainty in gross thickness and net-to-gross ratio accounted for most of the remaining variation.

Due to changes in depositional setting and depth, the P50 initial injectivity estimates for the Precipice Sandstone varies by an order of magnitude from 0.2 to 2.4 megatonne per anum (Mt/a) across the 4 areas. P10/P90 ratios were between 10 and 20 and are indicative of the relative immaturity of the technical assessment. Concepts including several wells will likely be required for industrial scale, multi-Mt/a developments. Dynamic well testing specifically to determine compartmentalisation and heterogeneity and the departure from steady state will be essential in designing and costing any field development plan. Therefore such data will be essential in any exploration or appraisal program.
Keyword Carbon dioxide
Confidence levels
Injectivity
Precipice
Probabilistic
Surat
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
Collections: Faculty of Science Publications
Official 2014 Collection
 
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Created: Tue, 06 May 2014, 02:28:44 EST by System User on behalf of UQ Energy Initiative