Foam Generation in Flow Across a Sharp Permeability Transition: Effect of Velocity and Fractional Flow
- Swej Shah (Delft University of technology) | Herru As Syukri (Delft University of technology) | Karl-Heinz Wolf (Delft University of technology) | Rashidah Pilus (Universiti Teknologi PETRONAS) | William Rossen (Delft University of technology)
- Document ID
- Society of Petroleum Engineers
- SPE Europec featured at 81st EAGE Conference and Exhibition, 3-6 June, London, England, UK
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Petroleum Engineers
- 2.5.2 Fracturing Materials (Fluids, Proppant), 1.6 Drilling Operations, 1.6.9 Coring, Fishing, 5 Reservoir Desciption & Dynamics, 5.4 Improved and Enhanced Recovery, 2.4 Hydraulic Fracturing, 5.4 Improved and Enhanced Recovery, 2 Well completion, 5.7.2 Recovery Factors, 5.7 Reserves Evaluation, 5.5.2 Core Analysis
- Foam generation, CT scanning, Enhanced Oil Recovery, Permeability heterogeneity, Snap-off
- 3 in the last 30 days
- 81 since 2007
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Foam reduces gas mobility and can help improve sweep efficiency in an enhanced oil recovery process. For the latter, long-distance foam propagation is crucial. In porous media, strong foam generation requires that local pressure gradient exceeds a critical value (∇Pmin). Normally, this only happens in the near-well region. Away from wells, these requirements may not be met, and foam propagation is uncertain.
It has been shown theoretically that foam can be generated, independent of pressure gradient, during flow across an abrupt increase in permeability (Rossen, 1999). Experimental studies testing the limits of this phenomenon at field-like velocities have not been conducted. The objective of this study is to validate theoretical explanations through experimental evidence and to quantify the effect of fractional flow on this process.
This article is an extension of a recent study (Shah et al., 2018) investigating the effect of permeability contrast on this process. In this study the effects of fractional flow and total superficial velocity are described. Coreflood experiments were performed in a cylindrical sintered glass porous medium with two homogeneous layers and a sharp permeability jump in between, representing a lamination or cross-lamination. Unlike previous studies, gas and surfactant solution were co-injected at field-like velocities into a medium at steady-state to gas-brine co-injection. Pressure gradient is measured across several sections of the core. X-ray computerized tomography (CT) is used to generate dynamic phase saturation maps as foam generates and propagates through the core. We investigate the effects of velocity and injected gas fractional flow on foam generation and mobilization by systematically changing these variables through multiple experiments. The core is thoroughly cleaned after each experiment to remove any trapped gas and to ensure no hysteresis.
Local pressure measurements and CT-based saturation maps confirm that foam is generated at the permeability transition, which then propagates downstream to the outlet of the core. A significant reduction in gas mobility is observed, even at low superficial velocities, however, the limit of foam propagation is reached at the lowest velocity tested. CT images were used to quantify the accumulation of liquid near the permeability jump, causing local capillary pressure to fall below the critical capillary pressure required for snap-off. This leads to foam generation by snap-off. At the tested fractional flows, no clear trend was observed between foam strength and fg. For a given permeability contrast, foam generation was observed at higher gas fractions than predicted by previous work (Rossen, 1999). Significant fluctuations in pressure gradient accompanied the process of foam generation, indicating a degree of intermittency in the generation rate - probably reflecting cycles of foam generation, dryout, imbibition, and then generation. The intermittency of foam generation was found to increase with decreasing injection velocities and increasing fractional flow. Within the range of conditions tested, the onset of foam generation (identified by the rise in ∇P and Sg) occurs after roughly the same amount of surfactant injection, independent of fractional flow or injected rate.
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Armstrong, R. T., McClure, J. E., Berrill, M. A., Rücker, M. . 2016. Beyond Darcy's Law: Role of Phase Topology and Ganglion Dynamics for Two-Fluid Flow. Phys. Rev. E 94 (043113), doi: 10.1103/PhysRevE.94.043113.
As Syukri, H. 2018. Experimental Study: Foam Generation and Propagation in Flow Across a Permeability Contrast, Master's thesis, Delft University of Technology, Delft, The Netherlands. uuid:961bf2b5-28d5-41e4-9283-a20e1c5d672b.
Chambers, D. J. 1994. Foams for Well Stimulation, in Foams: Fundamentals and Applications in the Petroleum Industry, ed. L. L. Schramm, vol. 242 of Advances in Chemistry, chap. 9, 355-404, American Chemical Society, doi: 10.1021/ba-1994-0242.ch009.
Chen, X., Kianinejad, A., and DiCarlo, D. A. 2016. An extended JBN method of determining unsteady-state two-phase relative permeability. Water Resour. Res. 52 (10): 8374-8383, doi: 10.1002/2016WR019204.
Falls, A., Hirasaki, G., Patzek, T., Gauglitz, D.. 1988. Development of a Mechanistic Foam Simulator: The Population Balance and Generation by Snap-Off. SPE Reserv. Eng. 3 (03): 884-892, doi: 10.2118/14961-PA. SPE-14961-PA.
Farajzadeh, R., Krastev, R., and Zitha, P. 2008. Foam films stabilized with alpha olefin sulfonate (AOS). Colloids Surfaces A Physicochem. Eng. Asp. 324 (1-3): 35-40, doi: 10.1016/J.COLSURFA.2008.03.024.
Friedmann, F., Chen, W., and Gauglitz, P. 1991. Experimental and Simulation Study of High-Temperature Foam Displacement in Porous Media. SPE Reserv. Eng. 6 (01): 37-45, doi: 10.2118/17357-PA. SPE-17357-PA.
Gauglitz, P. A., Friedmann, F., Kam, S. I., and Rossen, W. R. 2002. Foam generation in homogeneous porous media. Chem. Eng. Sci. 57 (19): 4037-4052, doi: 10.1016/S0009-2509(02)00340-8.
Gupta, D. V. S. 2009. Unconventional Fracturing Fluids for Tight Gas Reservoirs, Presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, 19-21 January, doi: 10.2118/119424-MS. SPE-119424-MS.
Hartkamp-Bakker, C. 1993. Permeability heterogeneity in cross-bedded sandstones: Impact on water/oil displacement in fluvial reservoirs, Ph.D. thesis, Delft University of Technology, Delft, The Netherlands. uuid:be8ffa8f-5b66-4c46-932b-56d3eab5823e.
Hirasaki, G., Miller, C., Szafranski, R., Tanzil, D.. 1997a. Field Demonstration of the Surfactant / Foam Process for Aquifer Remediation, Presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, 5-8 October, doi: 10.2118/39292-MS. SPE-39292-MS.
Hirasaki, G. J., Jackson, R. E., Jin, M., Lawson, J. B.. 2000. Description of Surfactant/Foam Process and Surfactant-Enhanced Aquifer Remediation, in NAPL Removal: Surfactants, Foams, and Microemulsions, eds. S. Fiorenza, C. Miller, C. Oubre, and C. Ward, AATDF Monograph Series, 7-10, Boca Raton: CRC Press, doi: 10.1201/9781420026207.pt1.
Hirasaki, G. J., Miller, C. A., Szafranski, R., Lawson, J. B.. 1997b. Surfactant/Foam Process for Aquifer Remediation, in Proc., International Symposium on Oilfield Chemistry, Houston, Texas, 18-21 February, 471-480, doi: 10.2118/37257-MS. SPE-37257-MS.
Jenkins, M. 1984. An Analytical Model for Water/Gas Miscible Displacements, in SPE Enhanc. Oil Recover. Symp., Society of Petroleum Engineers, doi: 10.2118/12632-MS.
Kahrobaei, S., Li, K., Vincent-Bonnieu, S., and Farajzadeh, R. 2017a. Effects of compositional variations on CO2 foam under miscible conditions. AIChE J. 64 (2): 758--764, doi: 10.1002/aic.15938.
Kahrobaei, S., Vincent-Bonnieu, S., and Farajzadeh, R. 2017b. Experimental Study of Hysteresis Behavior of Foam Generation in Porous Media. Sci. Reports 7 (1): 8986, doi: 10.1038/s41598-017-09589-0.
Kam, S. and Rossen, W. R. 2003. A Model for Foam Generation in Homogeneous Media. SPE J. 8 (4): 417-425, doi: 10.2118/87334-PA.
Katz, A. J. and Thompson, A. H. 1986. Quantitative prediction of permeability in porous rock. Phys. Rev. B 34 (11): 8179-8181, doi: 10.1103/PhysRevB.34.8179.
Kirkpatrick, S. 1973. Percolation and Conduction. Rev. Mod. Phys. 45 (4): 574-588, doi: 10.1103/RevModPhys.45.574.
Kovscek, A. and Radke, C. 1994. Fundamentals of Foam Transport in Porous Media, in Foams: Fundamentals and Applications in the Petroleum Industry, ed. L. Schramm, vol. 242 of Advances in Chemistry, chap. 3, 115-163, Washington, DC: American Chemical Society, doi: 10.1021/ba-1994-0242.ch003.
Lenormand, R., Zarcone, C., and Sarr, A. 1983. Mechanisms of the displacement of one fluid by another in a network of capillary ducts. J. Fluid Mech. 135: 337-353, doi: 10.1017/S0022112083003110.
Leverett, M. 1941. Capillary Behavior in Porous Solids. Trans. AIME 142 (01): 152-169, doi: 10.2118/941152-G.
Li, Q. and Rossen, W. R. 2005. Injection Strategies for Foam Generation in Homogeneous and Layered Porous Media, Presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, 9-12 October, doi: 10.2118/96116-MS. SPE-96116-MS.
Lyons, W. C., Guo, B., Graham, R. L., and Hawley, G. D. 2009. Air and Gas Drilling Manual (Third Edition), Gulf Professional Publishing, doi: 10.1016/B978-0-12-370895-3.X0001-6.
Ma, K., Farajzadeh, R., Lopez-Salinas, J. L., Miller, C. A.. 2014. Non-uniqueness, Numerical Artifacts, and Parameter Sensitivity in Simulating Steady-State and Transient Foam Flow Through Porous Media. Transp. Porous Media 102 (3): 325-348, doi: 10.1007/s11242-014-0276-9.
Ma, K., Lopez-Salinas, J. L., Puerto, M. C., Miller, C. A.. 2013. Estimation of Parameters for the Simulation of Foam Flow through Porous Media. Part 1: The Dry-Out Effect. Energy Fuels 27 (5): 2363-2375, doi: 10.1021/ef302036s.
McCool, C. S., Parmeswar, R., and Willhite, G. P. 1983. Interpretation of Differential Pressure in Laboratory Surfactant/Polymer Displacements. SPE J. 23 (05): 791-803, doi: 10.2118/10713-PA.
Mees, F., Swennen, R., Geet, M. V., and Jacobs, P. 2003. Applications of X-ray Computed Tomography in the Geosciences. Geol. Soc. Special Publication 215: 1-6, doi: 10.1144/GSL.SP.2003.215.01.01.
Nabawy, B. S., Géacute;eraud, Y., Rochette, P., and Bur, N. 2009. Pore-throat characterization in highly porous and permeable sandstones. Am. Assoc. Pet. Geol. Bull. 93 (6): 719-739, doi: 10.1306/03160908131.
Ransohoff, T. and Radke, C. 1988. Mechanisms of Foam Generation in Glass-Bead Packs. SPE Reserv. Eng. 3 (2): 573-585, doi: 10.2118/15441-PA. SPE-15441-PA.
Reineck, H. E. and Singh, J. B. 1980. Depositional Sedimentary Environments, Berlin, Heidelberg: Springer Berlin Heidelberg, doi: 10.1007/978-3-642-96291-2.
Roof, J. G. 1970. Snap-Off of Oil Droplets in Water-Wet Pores. SPE J. 10 (01): 85-90, doi: 10.2118/2504-PA. SPE-2504-PA.
Rossen, W. R. 1996. Foams in Enhanced Oil Recovery, in Foams: Theory, Measurements and Applications, eds. R. K. Prud'homme and S. A. Khan, vol. 57 of Surfactant Science Series, chap. 11, 413 - 464, New York: Marcel Dekker, doi: 10.1201/9780203755709.
Rossen, W. R. 1999. Foam Generation at Layer Boundaries in Porous Media. SPE J. 4 (04): 409-412, doi: 10.2118/59395-PA. SPE-59395-PA.
Rossen, W. R. 2003. A Critical Review of Roof Snap-Off as a Mechanism of Steady-State Foam Generation in Homogeneous Porous Media. Colloids Surfaces A: Physicochem. Eng. Asp. 225 (1-3): 1-24, doi: 10.1016/S0927-7757(03)00309-1.
Rossen, W. R. and van Duijn, C. J. 2004. Gravity segregation in steady-state horizontal flow in homogeneous reservoirs. J. Pet. Sci. Eng. 43 (1-2): 99-111, doi: 10.1016/J.PETROL.2004.01.004.
Rossen, W. R. and Gauglitz, P. A. 1990. Percolation theory of creation and mobilization of foams in porous media. AIChE J. 36 (8): 1176-1188, doi: 10.1002/aic.690360807.
Schowalter, T. T. 1979. Mechanics of secondary hydrocarbon migration and entrapment. Am. Assoc. Pet. Geol. Bull. 5 (0149): 723-760, doi: 10.1306/2F9182CA-16CE-11D7-8645000102C1865D.
Stone, H. L. 1982. Vertical, Conformance In An Alternating Water-Miscible Gas Flood, in SPE Annu. Tech. Conf. Exhib., Society of Petroleum Engineers, doi: 10.2118/11130-MS.
Tanzil, D., Hirasaki, G., and Miller, C. 2002a. Mobility of Foam in Heterogeneous Media: Flow Parallel and Perpendicular to Stratification. SPE J. 7 (02): 203-212, doi: 10.2118/78601-PA. SPE-78601-PA.
Tanzil, D., Hirasaki, G. J., and Miller, C. A. 2002b. Conditions for Foam Generation in Homogeneous Porous Media, Presented at the SPE/DOE Improved Oil Recovery Symposium, Tulsa, Oklahoma, 13-17 April, doi: 10.2118/75176-MS. SPE-75176-MS.
Yang, J. and Siddiqui, S. 1999. The Use Of Foam To Improve Liquid Lifting From Low-Pressure Gas Wells, Presented at the Petroleum Conference of The South Saskatchewan Section, Regina, Saskatchewan, October 18-21, doi: 10.2118/99-126.
Yortsos, Y. C. and Chang, J. 1990. Capillary effects in steady-state flow in heterogeneous cores. Transp. Porous Media 5 (4): 399-420, doi: 10.1007/BF01141993.