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TitreShale oil and gas resources in organic pores of the Devonian Duvernay Shale, Western Canada Sedimentary Basin based on petroleum system modeling
AuteurWang, P; Chen, Z; Jin, Z; Jiang, C; Sun, M; Guo, Y; Chen, X; Jia, Z
SourceJournal of Natural Gas Science and Engineering vol. 50, 2017 p. 33-42, https://doi.org/10.1016/j.jngse.2017.10.027
Année2017
Séries alt.Ressources naturelles Canada, Contribution externe 20180138
ÉditeurElsevier
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1016/j.jngse.2017.10.027
Mediapapier; en ligne; numérique
Formatspdf; html
ProvinceAlberta
SNRC72E; 72L; 72M; 73D; 73E; 73L; 73M; 82G; 82H; 82I; 82J; 82N; 82O; 82P; 83; 84A; 84B; 84C; 84D
Lat/Long OENS-120.0000 -110.0000 56.7500 49.0000
Sujetsressources pétrolières; capacité de production d'hydrocarbures; hydrocarbures; pétrole; gaz; géologie du substratum rocheux; lithologie; roches sédimentaires; schistes; roches mères; roches reservoirs; matières organiques; établissement de modèles; production d'hydrocarbure; géochimie organique; pressions interstitielles; taille des pores; gaz libre; kérogène; antecedents thermiques; réflectance de la vitrinite; Bassin sédimentaire de l'ouest du Canada; Formation de Duvernay ; combustibles fossiles; géochimie; Phanérozoïque; Paléozoïque; Dévonien
Illustrationslocation maps; geoscientific sketch maps; photomicrographs; plots; profiles; histograms; graphs; time series; models; tables
ProgrammeÉvaluation des ressources pétrolières pour les schistes, Les géosciences pour les nouvelles sources d'énergie
Diffusé2017 12 02
Résumé(disponible en anglais seulement)
Shale-hosted hydrocarbons is regarded as an important unconventional resource around the world. So far, huge emphasis has been put on the contribution of organic pores to self-source and self-reservoir hydrocarbon systems. This study systemically reveals the contribution of organic pores to hydrocarbon potential in the Duvernay Shale through restoring thermal maturity evolution, modeling hydrocarbon generation and expulsion in the Duvernay Formation, analyzing absorption capacity variation with TOC and modeled pore pressure, determining free-gas storage capacity with calculated organic porosity and correction of adsorbed gas, and calculating in-place shale oil and gas volumes with volumetric method. The Duvernay Shale reached "oil window" and "gas window" about 70-80 Ma and 50 Ma ago, respectively. Significant hydrocarbon generation (20% TR) began and terminated (95% TR) at Ro of 0.65% and 1.85%, respectively. Gas generation rates increased dramatically from Ro of 1.1%, while the instantaneous HC1-4 expulsion reached peak at Ro of 1.66%, the difference between which indicates considerable retained gas resource in Duvernay Shale. The gas storage capacity, including absorption capacity and free gas capacity, varies significantly in the Duvernay Shale, specifically, the former ranges from 8 to 30 scf/ton, and the latter from 40 to 140scf/ton. The estimated median value of total in-place natural gas (GIP) and in-place oil resource (OIP) in organic pores of Duvernay shale are 404.8 TCF and 81420 MMbbl, respectively. Thus, the organic porosity is one of the keys to make the Duvernay Shale a successful play.
Résumé(Résumé en langage clair et simple, non publié et disponible en anglais seulement)
This study systemically reveals the contribution of organic matter pores to hydrocarbon potential in the Duvernay Shale. The Duvernay Shale was found to have reached ¿oil window¿ and ¿gas window¿ about 70¿80 Ma and 50 Ma ago, respectively. Significant hydrocarbon generation (20% TR) began and terminated (95% TR) at Ro of 0.65% and 1.85%, respectively. Gas generation rates increased dramatically from Ro of 1.1%, while the instantaneous HC1-4 expulsion reached peak at Ro of 1.66%, the difference between which indicates considerable retained gas resource in Duvernay Shale. The gas storage capacity, including absorption capacity and free gas capacity, varies significantly in the Duvernay Shale. The estimated median value of total in-place natural gas (GIP) and in-place oil resource (OIP) in the organic pores of Duvernay shale are 404.8 TCF and 81420 MMbbl, respectively.
GEOSCAN ID308437