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Article

Defining Uncertainty: Comparing Resource/Reserve Classification Systems for Coal and Coal Seam Gas

by 1,2,3,* and 4
1
School of Resources and Geoscience, China University of Mining and Technology, Xuzhou 221116, China
2
School of Earth and Atmospheric Sciences, Queensland University of Technology, Brisbane, QLD 4000, Australia
3
Cipher Consulting Pty Ltd., 6 Stardust Street, Kenmore, QLD 4069, Australia
4
Independent Consultant, P.O. Box 636, Kenmore, QLD 4069, Australia
*
Author to whom correspondence should be addressed.
Academic Editors: R. Marc Bustin, Gareth Chalmers and Maxim Tyulenev
Energies 2021, 14(19), 6245; https://doi.org/10.3390/en14196245
Received: 19 August 2021 / Revised: 17 September 2021 / Accepted: 23 September 2021 / Published: 30 September 2021
(This article belongs to the Special Issue Characterization of Unconventional Petroleum Reservoirs)
Transparent, objective, and repeatable resource assessments should be the goal of companies, investors, and regulators. Different types of resources, however, may require different approaches for their quantification. In particular, coal can be treated both as a solid resource (and thus be mined) as well as a reservoir for gas (which is extracted). In coal mining, investment decisions are made based on a high level of data and establishment of seam continuity and character. The Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (the JORC Code) allows deposits to be characterised based on the level of geological and commercial certainty. Similarly, the guidelines of the Petroleum Resource Management System (PRMS) can be applied to coal seam gas (CSG) deposits to define the uncertainty and chance of commercialisation. Although coal and CSG represent two very different states of resources (i.e., solid vs. gaseous), their categorisation in the JORC Code and PRMS is remarkably similar at a high level. Both classifications have two major divisions: resource vs. reserve. Generally, in either system, resources are considered to have potential for eventual commercial production, but this has not yet been confirmed. Reserves in either system are considered commercial, but uncertainty is still denoted through different subdivisions. Other classification systems that can be applied to CSG also exist, for example the Canadian Oil and Gas Evaluation Handbook (COGEH) and the Chinese Standard (DZ/T 0216-2020) and both have similar high-level divisions to the JORC Code and PRMS. A hypothetical case study of a single area using the JORC Code to classify the coal and PRMS for the gas showed that the two methodologies will have overlapping, though not necessarily aligned, resource and reserve categories. View Full-Text
Keywords: commerciality; risk; case study; Joint Ore Reserves Committee (JORC); Petroleum Resource Management System (PRMS); Canadian Oil and Gas Evaluation Handbook (COGEH); Chinese Standard (DZ/T 0216-2020) commerciality; risk; case study; Joint Ore Reserves Committee (JORC); Petroleum Resource Management System (PRMS); Canadian Oil and Gas Evaluation Handbook (COGEH); Chinese Standard (DZ/T 0216-2020)
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MDPI and ACS Style

Moore, T.A.; Friederich, M.C. Defining Uncertainty: Comparing Resource/Reserve Classification Systems for Coal and Coal Seam Gas. Energies 2021, 14, 6245. https://doi.org/10.3390/en14196245

AMA Style

Moore TA, Friederich MC. Defining Uncertainty: Comparing Resource/Reserve Classification Systems for Coal and Coal Seam Gas. Energies. 2021; 14(19):6245. https://doi.org/10.3390/en14196245

Chicago/Turabian Style

Moore, Tim A., and Mike C. Friederich 2021. "Defining Uncertainty: Comparing Resource/Reserve Classification Systems for Coal and Coal Seam Gas" Energies 14, no. 19: 6245. https://doi.org/10.3390/en14196245

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