Methods of risks and uncertainties evaluation according to SPE-PRMS classification of reserves and resources

Authors: I.S. Gutman, I.Yu. Balaban (Gubkin Russian State University of Oil and Gas, RF, Moscow)

Key words: classification of reserves and resources, SPE-PRMS classification, reserves and resources of oil and gas, reserves categories.

The article discusses risks and uncertainties as a basis for SPE-PRMS classification of reserves and resources. Dependence from geological heterogeneity of probable and possible reserves categorizing based on probabilistic method are shown. The examples of statistically justified methods for determining the range of uncertainty through the calculation of complementary percentiles are given. Doubtful aspects of the current practice of SPE-PRMS system usage are considered.

References
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