A Phase-Behavior Study for n-Hexane/Bitumen and n-Octane/Bitumen Mixtures
- Jianyi Gao (University of Alberta) | Ryosuke Okuno (University of Texas at Austin) | Huazhou A. Li (University of Alberta)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- February 2018
- Document Type
- Journal Paper
- 128 - 144
- 2018.Society of Petroleum Engineers
- Steam-assisted gravity drainage, Phase behavior, Steam-solvent coinjection, Bitumen
- 11 in the last 30 days
- 356 since 2007
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Steam/solvent coinjection has been studied as a potential method to improve the efficiency of conventional steam-assisted gravity drainage (SAGD) for bitumen recovery. This research is part of an experimental program for phase behavior of Athabasca-bitumen/solvent mixtures.
This paper presents a new set of experimental data for phase equilibrium, viscosity, density, and asphaltene precipitation for 11 mixtures of Athabasca bitumen with n-hexane and 10 mixtures of the same bitumen with n-octane. Phase-boundary measurements were conducted at temperatures up to 160°C and pressures up to 10 MPa. The bitumen sample used in this research was studied in our previous research, in which the same bitumen was not effectively diluted by n-butane because of the coexistence of a butane-rich liquid with a bitumen-rich liquid phase.
In this research, the liquid/liquid separation of hydrocarbons was not observed for n-hexane/bitumen (HB) and n-octane/bitumen (OB) mixtures for the range of temperatures and pressures tested, even at solvent concentrations higher than 90 mol%. This observation indicates that the amount of solvent available near the edge of a steam chamber is expected to be entirely used for bitumen dilution beyond the chamber edge in coinjection of steam with heavier hydrocarbon solvents, such as n-hexane and n-octane.
Experiments for asphaltene precipitation at atmospheric pressure showed a larger amount of precipitates with n-hexane than with n-octane at a given solvent concentration higher than 50 wt%. For solvent concentrations less than 50 wt%, no asphaltene precipitation was observed for both solvents with the bitumen sample tested in this research.
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Agrawal, P., Schoeggl, F. F., Satyro, M. A. et al. 2012. Measurement and Modeling of the Phase Behavior of Solvent Diluted Bitumens. Fluid Phase Equilibr. 334 (November): 51–64. https://doi.org/10.1016/j.fluid.2012.07.025.
Akbarzadeh, K., Alboudwarej, H., Svrcek, W. Y. et al. 2005. A Generalized Regular Solution Model for Asphaltene Precipitation From n-Alkane Diluted Heavy Oils and Bitumens. Fluid Phase Equilibria 232 (1–2): 159–170. https://doi.org/10.1016/j.fluid.2005.03.029.
Alboudwarej, H., Akbarzadeh, K., Beck, J. et al. 2003. Regular Solution Model for Asphaltene Precipitation from Bitumens and Solvents. AIChE J. 49 (11): 2948–2956. https://doi.org/10.1002/aic.690491124.
Ardali, M., Barrufet, M., and Mamora, D. D. 2012. Laboratory Testing of Addition of Solvents to Steam to Improve SAGD Process. Presented at SPE Heavy Oil Conference Canada, Calgary, 12–14 June. SPE-146993-MS. https://doi.org/10.2118/146993-MS.
Ardali, M., Mamora, D. D., and Barrufet, M. 2010. A Comparative Simulation Study of Addition of Solvents to Steam in SAGD Process. Presented at Canadian Unconventional Resources and International Petroleum Conference, Calgary, 19–21 October. SPE-138170-MS. https://doi.org/10.2118/138170-MS.
Argüelles-Vivas, F. J., Babadagli, T., Little, L. et al. 2012. High Temperature Density, Viscosity, and Interfacial Tension Measurements of Bitumen–Pentane–Biodiesel and Process Water Mixtures. J. Chem. Eng. Data 57 (10): 2878–2889. https://doi.org/10.1021/je3008217.
ASTM D88-07, Standard Test Method for Saybolt Viscosity. 2013. West Conshohocken, Pennsylvania: ASTM International. https://doi.org/10.1520/D0088.
ASTM D4124-09, Standard Test Method for Separation of Asphalt into Four Fractions. 2009. West Conshohocken, Pennsylvania: ASTM International. https://doi.org/10.1520/D4124-09.
Buenrostro-Gonzalez, E., Lira-Galeana, C., Gil-Villegas, A. et al. 2004. Asphaltene Precipitation in Crude Oils: Theory and Experiments. AIChE J. 50 (10): 2552–2570. https://doi.org/10.1002/aic.10243.
Butler, R.M. 1991. Thermal Recovery of Oil and Bitumen. Upper Saddle River, New Jersey: Prentice Hall.
Centeno, G., Sánchez-Reyna, G., Ancheyta, J. et al. 2011. Testing Various Mixing Rules for Calculation of Viscosity of Petroleum Blends. Fuel 90 (12): 3561–3570. https://doi.org/10.1016/j.fuel.2011.02.028.
Díaz, O. C., Modaresghazani, J., Satyro, M. A. et al. 2011. Modeling the Phase Behavior of Heavy Oil and Solvent Mixtures. Fluid Phase Equilibr. 304 (1–2): 74–85. https://doi.org/10.1016/j.fluid.2011.02.011.
Gao, J. 2016. An Experimental Study of Multiphase Behavior for Athabasca-Bitumen/Alkane-Solvent Mixtures. Master’s thesis, University of Alberta, Edmonton, Canada.
Gao, J., Okuno, R., and Li, H. A. 2016. An Experimental Study of Multiphase Behavior for n-Butane/Bitumen/Water Mixtures. SPE J. SPE-180736-PA (in press; posted October 2016). https://doi.org/10.2118/180736-PA.
Glandt, C. A. and Chapman, W. G. 1995. The Effect of Water Dissolution on Oil Viscosity. SPE Res Eng 10 (1): 59–64. SPE-24631-PA. https://doi.org/10.2118/24631-PA.
Govind, P. A., Das, S. K., Srinivasan, S. et al. 2008. Expanding Solvent SAGD in Heavy Oil Reservoirs. Presented at the International Thermal Operations and Heavy Oil Symposium, Calgary, 20–23 October. SPE-117571-MS. https://doi.org/10.2118/117571-MS.
Gupta, S. C. and Gittins, S. D. 2007. Effect of Solvent Sequencing and Other Enhancements on Solvent Aided Process. J Can Pet. Technol 46 (9): 57–61. PETSOC-07-09-06. https://doi.org/10.2118/07-09-06.
Hascakir, B. 2016. How to Select the Right Solvent for Solvent-Aided Steam Injection Processes. J. Pet. Sci. Eng. 146 (October): 746–751. https://doi.org/10.1016/j.petrol.2016.07.038.
Hosseininejad Mohebati, M. H., Maini, B. B., and Harding, T. G. 2010. Optimization of Hydrocarbon Additives With Steam in SAGD for Three Major Canadian Oil Sands Deposits. Presented at Canadian Unconventional Resources and International Petroleum Conference, Calgary, 19–21 October. SPE-138151-MS. https://doi.org/10.2118/138151-MS.
Hosseininejad Mohebati, M., Maini, B. B., and Harding, T. G. 2012. Numerical-Simulation Investigation of the Effect of Heavy-Oil Viscosity on the Performance of Hydrocarbon Additives in SAGD. SPE Res Eval & Eng 15 (2): 165–181. SPE-138151-PA. https://doi.org/10.2118/138151-PA.
Jha, R. K., Kumar, M., Benson, I. et al. 2013. New Insights into Steam-Solvent Co-Injection Process Mechanism. SPE J. 18 (5): 867–877. SPE-159277-PA. https://doi.org/10.2118/159277-PA.
Jindrová, T., Mikyška, J., and Firoozabadi, A. 2015. Phase Behavior Modeling of Bitumen and Light Normal Alkanes and CO2 by PR-EOS and CPA-EOS. Energ. Fuel. 30 (1): 515–525. https://doi.org/10.1021/acs.energyfuels.5b02322.
Kariznovi, M., Nourozieh, H., Guan, J. G. J. et al. 2013. Measurement and Modeling of Density and Viscosity for Mixtures of Athabasca Bitumen and Heavy n-alkane. Fuel 112 (October): 83–95. https://doi.org/10.1016/j.fuel.2013.04.071.
Kariznovi, M., Nourozieh, H., and Abedi, J. 2014a. Measurement and Correlation of Viscosity and Density for Compressed Athabasca Bitumen at Temperatures Up to 200°C. J Can Pet Technol 53 (6): 330–338. SPE-173182-PA. https://doi.org/10.2118/173182-PA.
Kariznovi, M., Nourozieh, H., and Abedi, J. 2014b. Volumetric Properties of Athabasca Bitumenþn-Hexane Mixtures. Energ. Fuel. 28 (12): 7418–7425. https://doi.org/10.1021/ef5019884.
Keshavarz, M., Okuno, R., and Babadagli, T. 2015a. Optimal Application Conditions for Steam/Solvent Coinjection. SPE Res Eval & Eng 18 (1): 20–38. SPE-165471-PA. https://doi.org/10.2118/165471-PA.
Keshavarz, M., Okuno, R., and Babadagli, T. 2015b. A Semi-Analytical Solution to Optimize Single-Component Solvent Coinjection with Steam during SAGD. Fuel 144 (15 March): 400–414. https://doi.org/10.1016/j.fuel.2014.12.030.
Khan, M. A. B., Mehrotra, A. K., and Svrcek, W. Y. 1984. Viscosity Models for Gas-Free Athabasca Bitumen. J Can Pet Technol 23 (3): 47–53. PETSOC-84-03-05. https://doi.org/10.2118/84-03-05.
Krejbjerg, K. and Pedersen, K. S. 2006. Controlling VLLE Equilibrium With a Cubic EOS in Heavy Oil Modeling. Paper presented at the Canadian International Petroleum Conference, Calgary, 13–15 June. PETSOC-2006-052. https://doi.org/10.2118/2006-052.
Kumar, A. and Okuno, R. 2016a. A New Algorithm for Multiphase Fluid Characterization for Solvent Injection. SPE J. 21 (5): 1688–1704. SPE-175123-PA. https://doi.org/10.2118/175123-PA.
Kumar, A. and Okuno, R. 2016b. Reliable Characterization of Bitumen Based on Perturbation from n-Alkanes for Steam/Solvent Coinjection Simulation. Fuel 182 (15 October): 141–153. https://doi.org/10.1016/j.fuel.2016.05.095.
Lemmon, E. W., McLinden, M. O., and Friend, D. G. Thermophysical Properties of Fluid System. In NIST Chemistry WebBook, ed. P. J. Linstrom and W. G. Mallard, National Institute of Standards and Technology, Gaithersburg, MD, http://webbook.nist.gov (retrieved 28 August 2016).
Li, Y. K. 1983. Heavy Fraction Characterization and Hypothetical Component Selection for Oil and Gas Mixtures. Computer Modelling Group Research Report R12.04, May 1983.
Li, W. and Mamora, D. D. 2010. Phase Behavior of Steam with Solvent Co-injection under Steam Assisted Gravity Drainage (SAGD) Process. Presented at SPE EUROPEC/EAGE Annual Conference and Exhibition, Barcelona, Spain, 14–17 June. SPE-130807-MS. https://doi.org/10.2118/130807-MS.
Li, W., Mamora, D. D., and Li, Y. 2011. Solvent-Type and –Ratio Impacts on Solvent-Aided SAGD Process. SPE Res Eval & Eng 14 (3): 320–331. SPE-130802-PA. https://doi.org/10.2118/130802-PA.
Li, Z. and Firoozabadi, A. 2010. Modeling Asphaltene Precipitation by n-Alkanes from Heavy Oils and Bitumens Using Cubic-Plus-Association Equation of State. Energ. Fuel. 24 (2): 1106–1113. https://doi.org/10.1021/ef9009857.
Luo, S. and Barrufet, M. A. 2005. Reservoir Simulation Study of Water-in-Oil Solubility Effect on Oil Recovery in Steam Injection Process. SPE Res Eval & Eng 8 (6): 528–533. SPE-89407-PA. https://doi.org/10.2118/89407-PA.
Ma, M., Chen, S., and Abedi, J. 2016. Predicting the Multiphase Equilibrium and Density of Bitumen with C2H6, C3H8 and CO2 Using the Simplified PC-SAFT Equation of State. Fuel 181 (1 October): 652–659. https://doi.org/10.1016/j.fuel.2016.05.040.
Mehra, R. K. 1981. The Computation of Multi-Phase Equilibrium in Compositional Reservoir Studies. PhD Dissertation, University of Calgary, Calgary.
Mehrotra, A. K. and Svrcek, W. Y. 1985a. Viscosity, Density and Gas Solubility Data for Oil Sand Bitumens. Part I: Athabasca Bitumen Saturated with CO and C2H6. AOSTRA J. Res. 1 (4): 263–268.
Mehrotra, A. K. and Svrcek, W. Y. 1985b. Viscosity, Density and Gas Solubility Data for Oil Sand Bitumens. Part II: Peace River Bitumen Saturated with N2, CO, CH4, CO2 and C2H6. AOSTRA J. Res. 1 (4): 269–279.
Mehrotra, A. K. and Svrcek, W. Y. 1985c. Viscosity, Density and Gas Solubility Data for Oil Sand Bitumens. Part III: Wabasca Bitumen Saturated with N2, CO, CH4, CO2 and C2H6. AOSTRA J. Res. 2 (2): 83–93.
Mehrotra, A. K. and Svrcek, W. Y. 1986. Viscosity of Compressed Athabasca Bitumen. Can. J. Chem. Eng. 64 (5): 844–847. https://doi.org/10.1002/cjce.5450640520.
Mehrotra, A. K. and Svrcek, W. Y. 1987. Viscosity of Compressed Cold Lake Bitumen. Can. J. Chem. Eng. 65 (4): 672–675. https://doi.org/10.1002/cjce.5450650423.
Mehrotra, A. K. and Svrcek, W. Y. 1988. Properties of Cold Lake Bitumen Saturated with Pure Gases and Gas Mixtures. Can. J. Chem. Eng. 66 (4): 656–665. https://doi.org/10.1002/cjce.5450660419.
Mohammadzadeh, O., Rezaei, N., and Chatzis, I. 2012. More Insight into the Pore-Level Physics of the Solvent-Aided SAGD (SA-SAGD) Process for Heavy Oil and Bitumen Recovery. Presented at SPE Heavy Oil Conference Canada, Calgary, 12–14 June. SPE-157776-MS. https://doi.org/10.2118/157776-MS.
Nagarajan, N. R., Honarpour, M. M., and Sampath, K. 2006. Reservoir Fluid Sampling and Characterization–Key to Efficient Reservoir Management. Presented at the Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 5–8 November. SPE-101517-MS. https://doi.org/10.2118/101517-MS.
Naseri, A., Nikazar, M., and Mousavi Dehghani, S. A. 2005. A Correlation Approach for Prediction of Crude Oil Viscosities. J. Pet. Sci. Eng. 47 (3–4): 163–174. https://doi.org/10.1016/j.petrol.2005.03.008.
Nasr, T. N. and Isaacs, E. 2001. Process for Enhancing Hydrocarbon Mobility Using a Steam Additive. US Patent 6230814.
Nasr, T. N., Beaulieu, G., Golbeck, H. et al. 2003. Novel Expanding Solvent-SAGD Process “ES-SAGD.” J Can Pet Technol 42 (1): 13–16. PETSOC-03-01-TN. https://doi.org/10.2118/03-01-TN.
Nourozieh, H., Kariznovi, M., Guan, J. G. et al. 2013. Measurement of Thermophysical Properties and Modeling for Pseudo-Binary Mixtures of n-Decane and Athabasca Bitumen. Fluid Phase Equilibr. 347 (15 June): 62–75. https://doi.org/10.1016/j.fluid.2013.03.010.
Nourozieh, H., Kariznovi, M., and Abedi, J. 2014. Measurement and Prediction of Density for the Mixture of Athabasca Bitumen and Pentane at Temperatures up to 200°C. Energ. Fuel. 28 (5): 2874–2885. https://doi.org/10.1021/ef4022784.
Nourozieh, H., Kariznovi, M., and Abedi, J. 2015a. Viscosity Measurement and Modeling for Mixtures of Athabasca Bitumen/n-Pentane at Temperatures up to 200°C. SPE J. 20 (2): 226–238. SPE-170252-PA. https://doi.org/10.2118/170252-PA.
Nourozieh, H., Kariznovi, M., and Abedi, J. 2015b. Viscosity Measurement and Modeling for Mixtures of Athabasca Bitumen/Hexane. J. Pet. Sci. Eng. 129 (May): 159–167. https://doi.org/10.1016/j.petrol.2015.03.002.
Nourozieh, H., Kariznovi, M., and Abedi, J. 2015c. Density and Viscosity of Athabasca Bitumen Samples at Temperatures Up to 200°C and Pressures Up to 10 MPa. SPE Res Eval & Eng 18 (3): 375–386. SPE-176026-PA. https://doi.org/10.2118/176026-PA.
Nourozieh, H., Kariznovi, M., and Abedi, J. 2015d. Modeling and Measurement of Thermo-Physical Properties for Athabasca Bitumen and n-heptane Mixtures. Fuel 157 (1 October): 73–81. https://doi.org/10.1016/j.fuel.2015.04.032.
Panuganti, S. R., Vargas, F. M., Gonzalez, D. L. et al. 2012. PC-SAFT Characterization of Crude Oils and Modeling of Asphaltene Phase Behavior. Fuel 93 (March): 658–669. https://doi.org/10.1016/j.fuel.2011.09.028.
Péneloux, A. and Rauzy, E. 1982. A Consistent Correction for Redlich-Kwong-Soave Volumes. Fluid Phase Equilibr. 8 (1): 7–23. https://doi.org/10.1016/0378-3812(82)80002-2.
Peng, D. Y. and Robinson, D. B. 1976. A New Two-Constant Equation of State. Ind. Eng. Chem. Fundamen. 15 (1): 59–64. https://doi.org/10.1021/i160057a011.
Quiñones-Cisneros, S. E., Dalberg, A., and Stenby, E. H. 2004. PVT Characterization and Viscosity Modeling and Prediction of Crude Oils. Pet. Sci. Tech. 22 (9–10): 1309–1325. https://doi.org/10.1081/LFT-200034092.
Rassamdana, H., Dabir, B., Nematy, M. et al. 1996. Asphalt Flocculation and Deposition: I. The Onset of Precipitation. AIChE J. 42 (1): 10–22. https://doi.org/10.1002/aic.690420104.
Redford, D. A. and McKay, A. S. 1980. Hydrocarbon-Steam Processes for Recovery of Bitumen from Oil Sands. Presented at SPE/DOE Enhanced Oil Recovery Symposium, Tulsa, 20–23 April. SPE-8823-MS. https://doi.org/10.2118/8823-MS.
Robinson, D. B. and Peng, D. Y. 1978. The Characterization of the Heptanes and Heavier Fractions for the GPA Peng-Robinson Programs. Research report, Gas Processors Association, Tulsa.
Sabbagh, O., Akbarzadeh, K., Badamchi-Zadeh, A. et al. 2006. Applying the PR-EoS to Asphaltene Precipitation from n-Alkane Diluted Heavy Oils and Bitumens. Energ. Fuel. 20 (2): 625–634. https://doi.org/10.1021/ef0502709.
Satyro, M. A. and Yarranton, H.W. 2010. Expanded Fluid-Based Viscosity Correlation for Hydrocarbons Using an Equation of State. Fluid Phase Equilibr. 298 (1): 1–11. https://doi.org/10.1016/j.fluid.2010.06.023.
Svrcek, W. Y. and Mehrotra, A. K. 1989. Properties of Peace River Bitumen Saturated with Field Gas Mixtures. J Can Pet Technol 28 (2): 50–56. PETSOC-89-02-01. https://doi.org/10.2118/89-02-01.
Tavakkoli, M., Chen, A., Sung, C. et al. 2016. Effect of Emulsified Water on Asphaltene Instability in Crude Oils. Energ. Fuel. 30 (5): 3676–3686. https://doi.org/10.1021/acs.energyfuels.5b02180.
Tavakkoli, M., Panuganti, S. R., Taghikhani, V. et al. 2013. Precipitated Asphaltene Amount at High-Pressure and High-Temperature Conditions. Energ. Fuel. 28 (3): 1596–1610. https://doi.org/10.1021/ef401074e.
Vargas, F. M., Gonzalez, D. L., Creek, J. L. et al. 2009. Development of a General Method for Modeling Asphaltene Stability. Energ. Fuel. 23 (3): 1147–1154. https://doi.org/10.1021/ef800666j.
Venkatramani, A. and Okuno, R. 2015. Characterization of Water-Containing Reservoir Oil Using an EOS for Steam Injection Processes. J. Nat. Gas Sci. Eng. 26 (September): 1091–1106. https://doi.org/10.1016/j.jngse.2015.07.036.
Venkatramani, A. and Okuno, R. 2016. Compositional Mechanisms in Steam-Assisted Gravity Drainage and Expanding-Solvent Steam-Assisted Gravity DrainageWith Consideration of Water Solubility in Oil. SPE Res Eval & Eng. SPE-180737-PA (in press; posted September 2016).
Yazdani, A. J., Alvestad, J. A., Kjonsvik, D. et al. 2011. A Parametric Simulation Study for Solvent Co-injection Process in Bitumen Deposits. Presented at the Canadian Unconventional Resources Conference, Calgary, 15–17 November. SPE-148804-MS. https://doi.org/10.2118/148804-MS.
Zirrahi, M., Hassanzadeh, H., and Abedi, J. 2015a. Prediction of CO2 Solubility in Bitumen Using the Cubic-Plus-Association Equation of State (CPA-EOS). J. Supercrit. Fluid. 98 (March): 44–49. https://doi.org/10.1016/j.supflu.2015.01.001.
Zirrahi, M., Hassanzadeh, H., and Abedi, J. 2015b. Prediction of Water Solubility in Petroleum Fractions and Heavy Crudes Using Cubic-Plus-Association Equation of State (CPA-EoS). Fuel 159 (1 November): 894–899. https://doi.org/10.1016/j.fuel.2015.07.058.
Zou, X.-Y., Zhang, X., and Shaw, J. A. 2007. Phase Behavior of Athabasca Vacuum BottomsþN-alkane Mixtures. SPE Prod & Oper 22 (2): 265–272. SPE-97661-PA. https://doi.org/10.2118/97661-PA.
Zúñiga-Hinojosa, M. A., Justo-García, D. N., Aquino-Olivos, M. A. et al. 2014. Modeling of Asphaltene Precipitation from n-Alkane Diluted Heavy Oils and Bitumens Using the PC-SAFT Equation of State. Fluid Phase Equilibr. 376 (25 August): 210–224. https://doi.org/10.1016/j.fluid.2014.06.004.