Research Papers: Petroleum Engineering

Pore-Scale Transport Mechanisms and Macroscopic Displacement Effects of In-Situ Oil-in-Water Emulsions in Porous Media

[+] Author and Article Information
Chuan Lu

Research Institute of China
National Offshore Oil Corporation,
Beijing 100027, Chaoyang, China
e-mail: luchuan2106@163.com

Wei Zhao

Department of Petroleum Engineering,
China University of Petroleum-Beijing,
Beijing 102249, Changping, China
e-mail: zhaoweicup@126.com

Yongge Liu

Department of Petroleum Engineering,
China University of Petroleum (East China),
Shandong 257061, Huangdao, China
e-mail: yg198706@163.com

Xiaohu Dong

Department of Petroleum Engineering,
China University of Petroleum-Beijing,
Beijing 102249, Changping, China
e-mail: donghu820@163.com

Contributed by the Petroleum Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received February 18, 2016; final manuscript received May 2, 2018; published online May 29, 2018. Assoc. Editor: Daoyong (Tony) Yang.

J. Energy Resour. Technol 140(10), 102904 (May 29, 2018) (8 pages) Paper No: JERT-16-1099; doi: 10.1115/1.4040200 History: Received February 18, 2016; Revised May 02, 2018

Oil-in-water (O/W) emulsions are expected to be formed in the process of surfactant flooding for heavy oil reservoirs in order to strengthen the fluidity of heavy oil and enhance oil recovery. However, there is still a lack of detailed understanding of mechanisms and effects involved in the flow of O/W emulsions in porous media. In this study, a pore-scale transparent model packed with glass beads was first used to investigate the transport and retention mechanisms of in situ generated O/W emulsions. Then, a double-sandpack model with different permeabilities was used to further study the effect of in situ formed O/W emulsions on the improvement of sweep efficiency and oil recovery. The pore-scale visualization experiment presented an in situ emulsification process. The in situ formed O/W emulsions could absorb to the surface of pore-throats, and plug pore-throats through mechanisms of capture-plugging (by a single emulsion droplet) and superposition-plugging or annulus-plugging (by multiple emulsion droplets). The double-sandpack experiments proved that the in situ formed O/W emulsion droplets were beneficial for the mobility control in the high permeability sandpack and the oil recovery enhancement in the low permeability sandpack. The size distribution of the produced emulsions proved that larger pressures were capable to displace larger O/W emulsion droplets out of the pore-throat and reduce their retention volumes.

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Dusseault, M. B. , 2002, “Cold Heavy Oil Production With Sand in the Canadian Heavy Oil Industry,” Alberta Ministry of Energy, Edmonton, AB, Canada.
Ezeuko, C. C. , Wang, J. , and Gates, I. D. , 2013, “ Investigation of Emulsion Flow in Steam-Assisted Gravity Drainage,” SPE J., 18(3), pp. 440–447. [CrossRef]
Liu, P. C. , Zheng, H. M. , and Wu, G. H. , 2017, “ Experimental Study and Application of Steam Flooding for Horizontal Well in Ultra-Heavy Oil Reservoirs,” ASME J. Energy Resour. Technol., 139(1), p. 012908. [CrossRef]
Ali, S. M. F. , 1974, “ Current Status of Steam Injection as a Heavy Oil Recovery Method,” J. Can. Pet. Technol., 13(1), pp. 54–68. [CrossRef]
Das, S. , 2007, “ Application of Thermal Processes in Heavy Oil Carbonate Reservoirs ,” SPE Middle East Oil and Gas Show and Conference, Manama, Bahrain, Mar. 11–14, SPE Paper No. SPE-105392-MS.
Naderi, K. , and Babadagli, T. , 2015, “ Solvent Selection Criteria and Optimal Application Conditions for Heavy-Oil/Bitumen Recovery at Elevated Temperatures: A Review and Comparative Analysis,” ASME J. Energy Resour. Technol., 138(1), p. 012904. [CrossRef]
Johnson, D. O. , Sugianto, R. , Mock, P. H. , and Jones, C. H. , 2004, “ Identification of Steam-Breakthrough Intervals With DTS Technology,” SPE Prod. Facil., 19(1), pp. 41–48. [CrossRef]
Zhang, H. L. , Liu, H. Q. , Wang, H. , Wang, S. L. , and Bao, C. S. , 2007, “ Optimization Design of Profile Control Parameters for Steam Stimulation Wells,” Acta Pet. Sin., 28(2), pp. 105–108. [CrossRef]
Santos, M. D. , Neto, A. D. , and Mata, W. , 2011, “ New Antenna Modelling Using Wavelets for Heavy Oil Thermal Recovering Methods,” J. Pet. Sci. Eng., 76(1–2), pp. 63–75. [CrossRef]
Liu, Q. , Dong, M. , and Ma, S. , 2006, “ Alkaline/Surfactant Flood Potential in Western Canadian Heavy Oil Reservoirs,” SPE/DOE Symposium on Improved Oil Recovery, Tulsa, OK, Apr. 22–26, SPE Paper No. SPE-99791-MS.
Liu, Q. , Dong, M. , Yue, X. , and Hou, J. , 2006, “ Synergy of Alkali and Surfactant in Emulsification of Heavy Oil in Brine,” Colloids Surf. A, 273(1–3), pp. 219–228. [CrossRef]
Li, X. J. , 2008, “ The Emulsification of Oil and Water in Porous Media and Its Effects on Enhanced Oil Recovery,” Ph.D. thesis, China University of Petroleum, Beijing, China.
Farias, M. R. D. , Carvalho, M. , Souza, A. , Hirasaki, G. , and Miller, C. , 2012, “ A Comparative Study of Emulsion Flooding and Other IOR Methods for Heavy Oil Fields,” SPE Latin American and Caribbean Petroleum Engineering Conference, Mexico City, Mexico, Apr. 16–18, SPE Paper No. SPE-152290-MS.
Yassin, M. R. , Ayatollahi, S. , Rostami, B. , Hassani, K. , and Taghikhani, V. , 2015, “ Micro-Emulsion Phase Behavior of a Cationic Surfactant at Intermediate Interfacial Tension in Sandstone and Carbonate Rocks,” ASME J. Energy Resour. Technol., 137(1), p. 012905. [CrossRef]
Kokal, S. L. , 2005, “ Crude Oil Emulsions: A State-of-the-Art Review,” SPE Prod. Facil., 20(1), pp. 5–13. [CrossRef]
Fu, X. B. , Lane, R. H. , and Mamora, D. D. , 2012, “ Water-in-Oil Emulsions: Flow in Porous Media and EOR Potential,” SPE Canadian Unconventional Resources Conference, Calgary, AB, Canada, Oct. 30–Nov. 1, SPE Paper No. SPE-162633-MS.
Wu, J. L. , Liu, Y. T. , and Yang, H. N. , 2012, “ New Method of Productivity Equation for Multibranch Horizontal Well in Three-Dimensional Anisotropic Oil Reservoirs,” ASME J. Energy Resour. Technol., 134(3), p. 032801. [CrossRef]
McAuliffe, C. D. , 1973, “ Crude-Oil-Water Emulsions to Improve Fluid Flow in an Oil Reservoir,” J. Pet. Technol., 25(6), pp. 721–726. [CrossRef]
Romero, L. , Ziritt, J. L. , Marin, A. , Rojas, F. , Mogollon, J. L. , and Paz, E. M. F. , 1996, “ Plugging of High Permeability—Fractured Zones Using Emulsions,” SPE/DOE Improved Oil Recovery Symposium, Tulsa, OK, Apr. 21–24, SPE Paper No. SPE-35461-MS.
Khambharatana, F. , Thomas, S. , and Ali, S. M. F. , 1998, “ Macroemulsion Rheology and Drop Capture Mechanism During Flow in Porous Media,” SPE International Conference and Exhibition, Beijing, China, Nov. 2–6, SPE Paper No. SPE-48910-MS.
Cobos, S. , Carvalho, M. S. , and Alvarado, V. , 2009, “ Flow of Oil–Water Emulsions Through a Constricted Capillary,” Int. J. Multiphase Flow, 35(6), pp. 507–515. [CrossRef]
Wang, J. , and Dong, M. Z. , 2009, “ Simulation of O/W Emulsion Flow in Alkaline/Surfactant Flood for Heavy Oil Recovery,” The Canadian International Petroleum Conference, Calgary, AB, Canada, June 16–18, Paper No. PETSOC-2009-066.
Guillen, V. R. , Carvalho, M. S. , and Alvarado, V. , 2012, “ Pore Scale and Macroscopic Displacement Mechanisms in Emulsion Flooding,” Transp. Porous Media, 94(1), pp. 197–206. [CrossRef]
Kumar, R. , Dao, E. , and Mohanty, K. K. , 2012, “ Heavy-Oil Recovery by In-Situ Emulsion Formation,” SPE J., 17(2), pp. 326–334. [CrossRef]
Chen, L. , Zhang, G. C. , Ge, J. J. , Jiang, P. , Tang, J. Y. , and Liu, Y. L. , 2013, “ Research of the Heavy Oil Displacement Mechanism by Using Alkaline/Surfactant Flooding System,” Colloids Surf. A, 434(19), pp. 63–71.
Wang, F. Q. , Qu, Z. H. , and Kong, L. R. , 2006, “ Experimental Study on the Mechanism of Emulsion Flooding With Micromodels,” Pet. Explor. Develop., 33(2), pp. 221–224.
Zeidani, K. , Polikar, M. , Huang, H. , and Boyd, J. , 2007, “ Heavy Oil-in-Water Emulsion as a Novel Sealant in the Near Well Bore Region,” Canadian International Petroleum Conference, Calgary, AB, Canada, June 12–14, Paper No. PETSOC-2007-183.
Wang, J. , Dong, M. Z. , and Arhuoma, M. , 2010, “ Experimental and Numerical Study of Improving Heavy Oil Recovery by Alkaline Flooding in Sandpacks,” J. Can. Pet. Technol., 49(3), pp. 51–57. [CrossRef]
Dong, M. Z. , Liu, Q. , and Li, A. F. , 2012, “ Displacement Mechanisms of Enhanced Heavy Oil Recovery by Alkaline Flooding in a Micromodel,” Particuology, 10(3), pp. 298–305. [CrossRef]
Mohebbifar, M. , Ghazanfari, M. H. , and Vossoughi, M. , 2015, “ Experimental Investigation of Nano-Biomaterial Applications for Heavy Oil Recovery in Shaly Porous Models: A Pore-Level Study,” ASME J. Energy Resour. Technol., 137(1), p. 014501. [CrossRef]
Zhang, C. Y. , Oostrom, M. , Wietsma, T. W. , Grate, J. W. , and Warner, M. G. , 2011, “ Liquid CO2 Displacement of Water in a Dual-Permeability Pore Network Micromodel,” Environ. Sci. Technol., 45(17), pp. 7581–7588. [CrossRef] [PubMed]
Yao, C. J. , Lei, G. L. , Cathles, L. M. , and Steenhuis, T. S. , 2014, “ Pore-Scale Investigation of Micron-Size Polyacrylamide Elastic Microspheres (MPEMs) Transport and Retention in Saturated Porous Media,” Environ. Sci. Technol., 48(9), pp. 5329–5335. [CrossRef] [PubMed]
Lu, C. , Liu, H. Q. , and Zhao, W. , 2017, “ Visualized Study of Displacement Mechanisms by Injecting Viscosity Reducer and Non-Condensable Gas to Assist Steam Injection,” J. Energy Inst., 90(1), pp. 73–81.
Arhuoma, M. , Yang, D. Y. , Dong, M. Z. , Li, H. , and Idem, R. , 2009, “ Numerical Simulation of Displacement Mechanisms for Enhancing Heavy Oil Recovery During Alkaline Flooding,” Energy Fuels., 23(12), pp. 5995–6002. [CrossRef]
Arhuoma, M. , Dong, M. Z. , Yang, D. Y. , and Idem, R. , 2009, “ Determination of Water-in-Oil Emulsion Viscosity in Porous Media,” Ind. Eng. Chem. Res., 48(15), pp. 7092–7102. [CrossRef]
Wang, J. , Liu, H. Q. , Wang, Z. L. , and Hou, P. C. , 2012, “ Experimental Investigation on the Filtering Flow Law of Pre-Gelled Particle in Porous Media,” Transp. Porous Med., 94(1), pp. 69–86.
Wang, J. , Liu, H. Q. , Pang, Z. X. , Liu, R. J. , and Li, M. , 2011, “ The Investigation of Threshold Pressure Gradient of Foam Flooding in Porous Media,” Pet. Sci. Technol., 29(23), pp. 2460–2470. [CrossRef]


Grahic Jump Location
Fig. 1

Schematic diagram of the experimental setup for the pore-scale transparent experiment: (a) flow diagram of the experimental setup. (b) Structure diagram of the main part of the transparent experiment.

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Fig. 2

Pore-scale images of in situ emulsification process: (a) Residual heavy oil was attached to the surface of glass bead (pore-throat) at the end of steam injection. (b) Residual heavy oil peeled off when VR solution was injected. ((c) and (d)) Residual heavy oil gradually dispersed into small droplets with the further injection of VR solution.

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Fig. 3

Images of emulsions at the outlet of pipeline: (a) smaller droplets and (b) Larger droplets

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Fig. 4

Pore-scale images of emulsion droplets adsorbing to the surface of porous media: (a) one emulsion droplet absorbed to the surface of one glass bead. (b) The location change of the emulsion droplet. (c) Two droplets absorbed to the same glass bead. (d) Three droplets absorbed to the same glass bead.

Grahic Jump Location
Fig. 5

Pore-scale images of a single emulsion droplet capture-plugging in porous media: (a) one emulsion droplet was captured in a pore-throat formed by two glass beads. ((b) and (c)) The emulsion droplet stretched and tended to pass through the pore-throat. (d) The emulsion droplet returned to its original shape.

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Fig. 6

Schematic diagram of a single emulsion droplet capture-plugging in porous media

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Fig. 7

Microscopic images of emulsion droplets superposition-plugging in porous media: ((a) and (b)) bridge-plugging mechanism of multiple emulsion droplets in pore-throats. (c) Annulus-plugging mechanism of multiple emulsion droplets in pore-throats.

Grahic Jump Location
Fig. 8

Schematic diagram of emulsion droplets superposition-plugging in porous media: (a) bridge-plugging mechanism of multiple emulsion droplets in pore-throats. (b) Annulus-plugging mechanism of multiple emulsion droplets in pore-throats.

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Fig. 10

Schematic diagram of rock particles in porous media

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Fig. 11

Variation of radius of pore-throat along with non-dimensional distance

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Fig. 12

Size distribution of the produced O/W emulsion droplets from each high permeability sandpack under different pressure drops: (a) first group: kH1 = 1131 mD and (b) second group: kH2 = 3276 mD

Grahic Jump Location
Fig. 9

Oil recovery and pressure drop curves during steam injection and VR solution injection through parallel sandpacks with different permeabilities: (a) permeability contrast = 2.03 (kH1 = 1131 mD, kL1 = 557 mD). (b) Permeability contrast = 5.98 (kH2 = 3276 mD, kL2 = 547 mD).



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