| Titre | Using copulas for implementation of variable dependencies in petroleum resource assessment: example from Beaufort-Mackenzie Basin, Canada |
| Auteur | Chen, Z  ; Osadetz, K G; Dixon, J
; Dietrich, J |
| Source | American Association of Petroleum Geologists Bulletin vol. 96, no. 3, 2012 p. 439-457, https://doi.org/10.1306/06301110196 |
| Année | 2012 |
| Séries alt. | Secteur des sciences de la Terre, Contribution externe 20110031 |
| Éditeur | American Association of Petroleum Geologists |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1306/06301110196 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Territoires du Nord-Ouest; Région extracotière du nord |
| SNRC | 107C/03; 107C/04; 107C/05; 107C/06; 107C/11 |
| Région | Beaufort-Mackenzie Basin; Mackenzie Delta; Richards Islands |
| Lat/Long OENS | -136.3333 -131.7500 71.0000 69.0000 |
| Sujets | hydrocarbures; capacité de production d'hydrocarbures; ressources pétrolières; présence de pétrole; exploration pétrolière; pétrole; établissement de modèles; estimation des réserves; estimation des
ressources; combustibles fossiles; géologie marine |
| Illustrations | histogrammes; graphiques; cartes de localisation; tableaux |
| Programme | GEM : La
géocartographie de l'énergie et des minéraux, Corridor et delta du Mackenzie |
| Résumé | (disponible en anglais seulement)
Petroleum resource potential modeling seeks to characterize undiscovered petroleum resources. This information from the modeling can contribute to a reduction
in corporate risk while characterizing the commercial potential of the undiscovered resources. Such models consider different types of variable dependencies arising from geologic risk evaluation, volumetric calculation, and resource aggregation to
higher geographic levels. Commonly, the available data are not sufficient to specify such variable correlations or interdependencies, particularly in frontier regions. It is also a challenge to formulate variable correlations in resource calculations
because geologic variables have to be fit to a multivariate lognormal distribution or other specific multivariate distributions with an appropriate correlation structure. However, variable correlations are common among the geologic variables, and
ignoring the interdependencies may lead to a serious bias in the resource potential estimation and the uncertainty range. Recent methodological developments in statistics indicate that the use of copulas permits more flexibility for the consideration
and incorporation of variable interdependency, thus analogs can be introduced to problems where estimating correlation structures are impossible and wider choices of statistical distributions become available. This article proposes the use of copulas
for handling variable dependency in petroleum resource assessment. The methods and procedures are illustrated using examples from a hypothetical data set and the crude oil resource appraisal of Tertiary clastic plays in Beaufort-Mackenzie Basin in
Arctic Canada. Comparisons of crude oil resource estimates obtained using different correlation scenarios for these plays suggest that when positive correlations are used, themean value of the oil resource is increased about 1.6 times that estimated,
assuming a complete independence among the input variables. |
| GEOSCAN ID | 288639 |
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