A Critical Review of the Solvent-Based Heavy Oil Recovery Methods
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Notice bibliographique
Résumé
Abstract Thermal-based heavy oil recovery methods, which are exemplified by steam-assisted gravity drainage (SAGD), have been successfully used in a number of field applications to enhance heavy oil recovery over three decades. However, there are several major technical issues associated with the thermal-based methods, such as large energy and water consumptions, extensive heat losses and expensive water treatment, as well as considerable greenhouse gas emissions. Thus the thermal-based methods are not suitable for many heavy oil reservoirs with thin pay zones, bottom water, gas caps, and low rock thermal conductivities due to economic constraints and environmental concerns. Alternatively, the solvent-based heavy oil recovery methods are considered. This paper provides a critical review of several solvent-based methods by conducting a comprehensive literature search of over 100 most recent and significant technical publications. First, the basic idea and technical development of each solvent-based heavy oil recovery method are briefly introduced. The advantages of solvent-based methods are stressed. Second, solvent-based methods are classified and each method is described. Third, a large number of experimental, theoretical and numerical studies of solvent-based methods are reviewed, from physical and theoretical modeling to numerical simulations. In particular, the heavy oil recovery mechanisms, phase behaviour and mass transfer of the heavy oil–solvent systems are examined in detail. A few important factors or major phenomena as well as their effects on the solvent-based methods are analyzed, which include the operating conditions (i.e., pressure and temperature), well configuration, solvent-induced asphaltene precipitation, interfacial tension (IFT), and viscous fingering. Most importantly, a total of six pilot tests or field applications of solvent-based methods, such as vapour extraction (VAPEX), liquid addition to steam to enhance recovery (LASER), and other hybrid steam–solvent processes, are evaluated. Finally, several major technical recommendations are made accordingly for future studies and developments of solvent-based heavy oil recovery methods and their potential variations. This updated technical review will help to better understand the solvent-based heavy oil recovery processes and guide a heavy oil producer to better design a solvent-based heavy oil recovery project.
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Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,002 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,001 |
| Méta-épidémiologie (sens large) | 0,004 | 0,001 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
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Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle