Miscible and Immiscible Foam Injection for Mobility Control and EOR in Fractured Oil-Wet Carbonate Rocks

Haugen, Åsmund; Mani, Nima; Svenningsen, Sondre; Brattekås, Bergit; Graue, A.; Ersland, Geir; Fernø, Martin A.

doi:10.1007/s11242-014-0323-6

Cited by 66 publications

(45 citation statements)

References 46 publications

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“…Steinsbø et al, 2014;Steinsbø et al, 2015;Haugen et al, 2014;Eide et al, 2015a). Within the experimental program both fractured and unfractured core samples are used and several parameters are varied and investigated such as i) different rock types (with a range of different porosity, permeability and wettability conditions); ii) oil composition (pure mineral oils and crude oils); iii) temperature and pressure conditions (CO2 is injected both in its liquid and in its supercritical state and at both miscible and not miscible conditions with the oil phase); iv) different initial water saturations (secondary and tertiary CO2 injections) and v) EOR efforts such as CO2-foam injection for mobility control.…”

Section: A N U S C R I P Tmentioning

confidence: 99%

Parametric study of oil recovery during CO2 injections in fractured chalk: Influence of fracture permeability, diffusion length and water saturation

Fernø

Steinsbø

Eide

et al. 2015

Journal of Natural Gas Science and Engineering

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Section: A N U S C R I P Tmentioning

confidence: 99%

Parametric study of oil recovery during CO2 injections in fractured chalk: Influence of fracture permeability, diffusion length and water saturation

Fernø

Steinsbø

Eide

et al. 2015

Journal of Natural Gas Science and Engineering

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“…High mobility of CO 2 compared with oil and water may lead to poor volumetric sweep efficiency, limited by gravity tonguing and/or viscous fingering (Lescure and Claridge 1986;Hirasaki and Zhang 2004). The high residual oil saturation after waterflooding makes carbonate reservoirs good candidates for CO 2 enhanced oil recovery (EOR).…”

Section: Introductionmentioning

confidence: 99%

Visualization of Carbon Dioxide Enhanced Oil Recovery by Diffusion in Fractured Chalk

et al. 2016

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This work demonstrates that diffusion may be a viable oil-recovery mechanism in fractured reservoirs during injection of carbon dioxide (CO 2 ) for enhanced oil recovery, depending on the CO 2 distribution within the fracture network and distance between fractures. High oil recovery was observed during miscible, supercritical CO 2 injection (R F ¼ 86% original oil in place) in the laboratory with a fractured chalk core plug with a large permeability contrast. Dynamic 3D fluid saturations from computed-tomography (CT) imaging made it possible to study the local oil displacement in the vicinity of the fracture, and to calculate an effective diffusion coefficient with analytical methods. The obtained diffusion coefficient varies between 0.83 and 1.2 Â10 À9 m 2 =s, depending on the method used for calculation. A numerical sensitivity analysis, with a validated numerical model that reproduced the experiments, showed that the rate of oil production during CO 2 injection declined exponentially with increasing diffusion lengths from the CO 2 -filled fracture and oil-filled matrix. In a numerical upscaling effort, with the experimentally achieved diffusion coefficient, oilrecovery rates and local flow were studied in an inverted five-spot pattern in a heavily fractured carbonate reservoir.

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“…Thus this EOR process can take place in the low permeability zone which otherwise would be bypassed in a conventional gas flooding. A great number of laboratory and numerical investigations have been performed to approve the effectiveness of the foam flooding worldwide in recent years (Ebrahimi et al, 2016;Haugen et al, 2014;Jian et al, 2012;Thorat and Bruining, 2016;Wang et al, 2011).…”

Section: Résumé -éValuation Et Optimisation D'une Technique De Rah Hymentioning

confidence: 99%

Evaluation and Optimization Study on a Hybrid EOR Technique Named as Chemical-Alternating-Foam Floods

Xu¹,

Saeedi²

2017

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-This work presents a novel Enhanced Oil Recovery (EOR) method called ChemicalAlternating-Foam (CAF) floods in order to overcome the drawbacks of the conventional foam flooding such as insufficient amount of in-situ foams, severe foam collapse and surfactant retention. The first part of this research focused on the comparison of conventional foam floods and CAF floods both of which had the same amount of gas and chemicals. It showed that: (1) CAF floods possessed the much greater Residual Resistance Factor (RRF) at elevated temperature; (2) the accumulative oil recovery of the CAF floods was 10%-15% higher than that of the conventional foam flooding. After 1.8 Pore Volume (PV) injection, the oil recovery reached the plateau for both methods; (3) CAF floods yielded the most amount of incremental oil at the 98% water cut (water content in the effluent), while the continuous foam floods achieved the best performance at 60% water cut. The second part of this work determined the optimal foam quality (gas/liquid ratio or the volume percent gas within foam), chemical/foam slug size ratio, cycle number and injection sequence for the CAF floods. It was found that the CAF was endowed with the peak performance if the foam quality, chemical/foam slug size ratio, cycle number was fixed at 80%, 1:1 and 3 respectively with the chemical slug being introduced ahead of the foam slug. Through systematic and thorough research, the proposed hybrid process has been approved to be a viable and effective method significantly strengthening the conventional foam flooding. Résumé -Évaluation et optimisation d'une technique de RAH hybride appelée Injection deMousse Chimique Alternative -Cet article présente une nouvelle méthode de Récupération Assistée des Hydrocarbures (RAH). Cette méthode, appelée injection de Mousse Chimique Alternative (MCA), permet de s'affranchir des inconvénients de l'injection de mousse conventionnelle, tels qu'une quantité insuffisante de mousse in situ, l'instabilité importante de la mousse ainsi qu'une rétention de tensioactif. La première partie de ces travaux de recherche s'est focalisée sur la comparaison entre l'injection de mousse conventionnelle et l'injection de MCA comportant, dans les deux cas, la même quantité de gaz et de produits chimiques. Il a été démontré que : (1) les injections de MCA présentaient le meilleur Facteur de Résistance Résiduel (FRR) à une température élevée ; (2) la récupération d'hydrocarbures cumulée par injections de MCA était de 10 à 15 % supérieure à celle de l'injection de mousse conventionnelle. Après une injection de 1,8 fois le Volume Poreux (VP), la récupération d'hydrocarbures a atteint un plafond pour les deux méthodes ; (3) les injections de MCA ont donné la plus grande quantité de pétrole avec une teneur en eau de 98 % (teneur en eau dans l'effluent), pendant que l'injection de mousse atteignait les meilleures performances à 60 % de teneur en eau. La seconde

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Miscible and Immiscible Foam Injection for Mobility Control and EOR in Fractured Oil-Wet Carbonate Rocks

Cited by 66 publications

References 46 publications

Parametric study of oil recovery during CO2 injections in fractured chalk: Influence of fracture permeability, diffusion length and water saturation

Parametric study of oil recovery during CO2 injections in fractured chalk: Influence of fracture permeability, diffusion length and water saturation

Visualization of Carbon Dioxide Enhanced Oil Recovery by Diffusion in Fractured Chalk

Evaluation and Optimization Study on a Hybrid EOR Technique Named as Chemical-Alternating-Foam Floods

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