Reservoir and operational parameters influence in SAGD process

Barillas, J. L. M.; Dutra, T. V.; Mata, Wilson da

doi:10.1016/j.petrol.2006.07.008

Cited by 52 publications

(29 citation statements)

References 2 publications

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“…They suggested further examination is needed [14]. This simulator has been successfully applied to the SAGD process by other investigators such as Akin and Bagci [9], Barillas et al [10] and Bagci [12], in conjunction with their experimental data.…”

Section: Sagd Simulation Literature Reviewmentioning

confidence: 97%

“…Barillas et al [10] determined the optimum steam injection rate for a homogenous reservoir whose sole heterogeneity was barriers using CMG (STARS). They noted that vertical permeability has a significant role on oil recovery.…”

Section: Sagd Simulation Literature Reviewmentioning

confidence: 99%

“…Parameters like horizontal permeability and viscosity have negligible effect on optimum steam injection rate. They investigated the effect of reservoir thickness too [10].…”

Section: Sagd Simulation Literature Reviewmentioning

confidence: 99%

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Simulation Study of Steam Assisted Gravity Drainage (SAGD) in Fractured Systems

Fatemi

2009

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Étude de simulation du drainage gravitaire assisté par injection de vapeur dans les systèmes fracturés -Le drainage gravitaire assisté par injection de vapeur (Steam Assisted Gravity Drainage, SAGD), procédé de récupération améliorée du pétrole (Enhanced Oil Recovery, EOR) mis au point pour la production assistée du pétrole et de bitume, est étudié de manière théorique et de manière expérimentale avec des modèles et dans des réservoirs conventionnels et se révèle être une méthode d'EOR prometteuse dans certains réservoirs d'huile lourde. Dans le présent travail, des études par simulation du SAGD ont été réalisées sur différents modèles fracturés, les fractures se trouvant à la fois dans la zone voisine du puits et dans la zone au-dessus du puits, et même en présence de réseaux de fractures. À un stade précoce du processus de SAGD dans un système fracturé, la vapeur se déplace d'abord à travers les fractures, puis les blocs de la matrice sont chauffés principalement par conduction et éventuellement par une certaine pénétration de la vapeur. L'interface huile-vapeur se forme et se développe à partir de tous les côtés de la matrice et de la chambre de vapeur et non par formation et rétrécissement d'une chambre de vapeur au centre de chaque bloc. La récupération par SAGD augmente en présence de fractures verticales mais elle est gênée par les fractures horizontales. L'espacement des fractures n'est pas un paramètre très important dans la mise en oeuvre des procédés par vapeur dans les modèles fracturés. Une fréquence de fracture élevée améliore les résultats par SAGD en réduisant la durée nécessaire pour le chauffage du bloc de matrice et en améliorant le processus de chauffage par conduction. L'effet des fractures horizontales entre les puits d'injection et les puits de production est insignifiant dans la mesure où le mécanisme de réalisation de SAGD dépend de la formation d'une chambre de vapeur dans la zone au-dessus du puits plutôt que dans la zone voisine du puits. Une augmentation de l'extension des fractures horizontales réduit la récupération finale de pétrole qui peut être obtenue par SAGD. Dans le modèle de réseau de fractures, la présence de fractures verticales améliore la récupération par rapport à ce qui est obtenu dans le cas de fractures horizontales seules. Abstract -Simulation Study of Steam Assisted Gravity Drainage (SAGD) in Fractured Systems

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Section: Sagd Simulation Literature Reviewmentioning

confidence: 97%

Section: Sagd Simulation Literature Reviewmentioning

confidence: 99%

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Simulation Study of Steam Assisted Gravity Drainage (SAGD) in Fractured Systems

Fatemi

2009

Oil & Gas Science and Technology - Rev. IFP

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“…Steam-assisted gravity drainage (SAGD) is a thermal method where steam injection is used. This method was invented by Butler in 1982, and is now becoming one of the mature commercial technologies [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…The release of energy as a result of steam condensation, leads to a higher temperature and mobility of heavy oil and bitumen, which then drains along the chamber edges and down to the production well. As the production of oil proceeds, the chamber grows upwards and to the sides [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Heavy Oil Production with Energy Effective Steam-Assisted Gravity Drainage

Høhrbye¹,

Mathiesen²,

Moldestad³

2016

Int. J. EQ

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In reservoirs with extra heavy oil and bitumen, thermal methods are used to reduce the viscosity, in order to extract the oil. Steam-assisted gravity drainage (SAGD) is a thermal method where continuous steam injection is used. In this method, two horizontal wells are placed in parallel. The upper well injects steam and the lower well produces oil and condensed water. The continuous steam injection creates a chamber with uniform temperature. Heavy oil and bitumen reserves in Western Canada, which exceed 175 billion barrels, are becoming increasingly important petroleum sources due to the technical success of the SAGD processes. This study includes Computational fluid dynamics (CFD) modelling and simulations of a horizontal oil well with SAGD. The simulations are performed with inflow control devices (ICD) and autonomous inflow control valves (AICV) completion. In the SAGD processes, it is important that the residence time for steam in the reservoir is high enough to ensure that all the injected steam condenses in the reservoir to reduce the amount of steam injection and thereby making the SAGD process more energy effective. The simulations are carried out with ICD completion to delay the steam breakthrough and with AICV completion to prevent breakthrough of steam and water to the well. The numerical results showed that a most of the steam was produced together with the oil when ICD completion was used. AICV was able to close for steam and water, and the steam was thereby forced to condense in the reservoir, resulting in better utilization of the condensation energy.

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Performance of a good‐emulsification‐oriented surfactant‐polymer system in emulsifying and recovering heavy oil

Wang

Ding

et al. 2019

Energy Science & Engineering

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Considering the significant importance of emulsification for heavy oil recovery, a good‐emulsification‐oriented (GEO) (rather than the conventional ultralow interfacial tension (IFT) oriented) surfactant‐polymer (SP) system was employed to remove heavy oil. Specifically, the emulsification behavior and viscosity‐reduction property of heavy oil in porous media were first studied by flood tests. Then, such a GEO SP was used to displace heavy oil for recovery measurement. It is found that first, as migration increases in porous media, the in situ emulsified oil droplets evolve into smaller and more uniform droplets (without coalescence), thus, exhibit self‐adjustment ability to match with, and plug, the pores. An increase in surfactant content and seepage velocity also makes the emulsion's particles smaller and more uniformly distributed. Second, such oil‐in‐water emulsification indeed helps to reduce heavy oil viscosity in porous media and there is an optimal surfactant content for such viscosity reduction: The lower the water cut, the greater the optimal surfactant content, the worse the viscosity‐reduction effect. Third, on its own, the GEO surfactant performs very poorly in recovering heavy oil and is even worse than the single polymer; therefore, such a surfactant should be jointly used with a polymer in an SP system instead of on its own, but an excessive surfactant content in the SP seems to hinder the recovery, while the large slug size tends to contribute significantly to an improved oil recovery.

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Reservoir and operational parameters influence in SAGD process

Cited by 52 publications

References 2 publications

Simulation Study of Steam Assisted Gravity Drainage (SAGD) in Fractured Systems

Simulation Study of Steam Assisted Gravity Drainage (SAGD) in Fractured Systems

Heavy Oil Production with Energy Effective Steam-Assisted Gravity Drainage

Performance of a good‐emulsification‐oriented surfactant‐polymer system in emulsifying and recovering heavy oil

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