| Titre | Wettability of the Montney tight gas formation |
| Auteur | Lan, Q; Dehghanpour, H; Wood, J M; Sanei, H |
| Source | Spe Reservoir Engineering vol. 118, issue 03, 2015, 21 pages, https://doi.org/10.2118/171620-pa |
| Année | 2015 |
| Séries alt. | Secteur des sciences de la Terre, Contribution externe 20140432 |
| Éditeur | Society of Petroleum Engineers |
| Réunion | SPE/CSUR Unconventional Resources Conference; Calgary; CA; Septembre 30 - Octobre 2, 2014 |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.2118/171620-pa |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Alberta |
| Sujets | hydrocarbures; capacité de production d'hydrocarbures; perméabilité; estimation des ressources; estimation des réserves; structure des pores; matières organiques |
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| Programme | Caractérisation des réservoirs de schiste, Les géosciences pour les nouvelles sources d'énergie |
| Résumé | (disponible en anglais seulement)
The abundant hydrocarbon resources in low-permeability formations are now technically accessible due to advances in
drilling and completion of
multi-lateral/multi-fractured horizontal wells. However, measurement and modeling of
petrophysical properties, required for reserve estimation and reservoir-engineering calculations are the remaining challenges
for the development of tight
formations. In particular, characterizing wettability (wetting affinity) of tight rocks is
challenging due to their complex pore structure, which can be either in hydrophobic organic materials or in hydrophilic
inorganic materials.
We
conduct comparative and systematic imbibition experiments on ten twin core plugs from the Montney tight gas
formation, which is an enormous tight gas fairway in the Western Canadian Sedimentary Basin. Both contact angle and
imbibition data
indicate that the formation has a stronger affinity to oil than to water. However, the ratio between oil and
water uptake of these samples is usually higher than what capillary-driven imbibition models predict. This discrepancy can be
explained
by the strong adsorption of oil on the surface of a well-connected organic pore-network that is partly composed of
degraded bitumen. We also define a wettability index based on the equilibrium oil and water uptake of the twin samples.
Oil
wettability index is positively correlated with Total Organic Carbon (TOC) and clay content of the rocks, which generally
increase from the Upper Montney to the Lower Montney. |
| Résumé | (Résumé en langage clair et simple, non publié)
Le présent article décrit le mécanisme d'écoulement des hydrocarbures dans le réseau de pores du réservoir de la formation de Montney et il est
important pour la compréhension de la qualité du réservoir et de la production des hydrocarbures. |
| GEOSCAN ID | 295819 |
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