Experimental Optimization of Catalytic Process In Situ for Heavy-Oil and Bitumen Upgrading
- Amjad A. Shah (University of Birmingham) | Robert P. Fishwick (University of Birmingham) | Gary A. Leeke (University of Birmingham) | Joseph Wood (University of Birmingham) | Sean P. Rigby (University of Nottingham) | Malcolm Greaves (University of Bath)
- Document ID
- Society of Petroleum Engineers
- Journal of Canadian Petroleum Technology
- Publication Date
- November 2011
- Document Type
- Journal Paper
- 33 - 47
- 2011. Society of Petroleum Engineers
- 4.1.9 Heavy Oil Upgrading, 4.1.2 Separation and Treating, 5.4 Enhanced Recovery, 5.4.6 Thermal Methods
- THAI, CAPRI, catalyst, optimization, bitumen
- 4 in the last 30 days
- 504 since 2007
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The worldwide conventional crude-oil demand is on the rise, and because of the rising prices, unconventional oils are becoming more economically attractive to extract and refine. However, technological innovation is needed if heavier oil supplies are to be exploited further. Toe-to-heel air injection (THAI) and its catalytic add-on processes (CAPRI) combine in-situ combustion with catalytic upgrading using an annular catalyst packed around the horizontal producer well. These techniques offer potentially higher recovery levels and lower environmental impact than alternative technologies (e.g., steam-based techniques). An experimental study is reported concerning the optimization of catalyst type and operating conditions for use in the THAI-CAPRI process. The feed oil was supplied from the Whitesands THAI-pilot trial. Experiments were carried out using microreactors containing 10 g of catalyst, with oil flow of 1 mL/min and gas flow of 0.5 L/min, under different temperatures, pressures, and gas environments. Catalysts tested included alumina-supported CoMo, NiMo, and ZnO/CuO. It was found that there was a trade-off in operation temperature between upgrading performance and catalyst lifetime. At a pressure of 20 bar, operation at 500°C led to an average of 6.1°API upgrading of THAI oil to 18.9°API, but catalyst lifetime was limited to 1.5 hours. Operation at 420°C was found to be a suitable compromise, with upgrading by an average of 1.6°API, and sometimes up to 3°API, with catalyst lifetime extended to 77.5 hours. Coke deposition occurred within the first few hours of the reaction, such that the catalyst pore space became blocked. However, upgrading continued, suggesting that thermal reactions or reactions catalysed by hydrogen transfer from the coke itself play a part in the upgrading reaction mechanism. The CAPRI process was relatively insensitive to changes in reaction-gas medium, gas-flow rate, and pressure, suggesting that the dissolution of hydrogen or methane from the gas phase does not play a key role in the upgrading reactions. By careful control of the temperature and oil-flow rate in the in-situ CAPRI process, additional upgrading compared with the THAI process alone may be effected, resulting in a more-valuable produced oil, which is easier to transport.
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Baker, E.W. and Louda, J.W. 1986. Porphyrin geochemistry of AtlanticJurassic-Cretaceous black shales. Organic Geochemistry 10(4-6): 905-914. doi:10.1016/S0146-6380(86)80028-6.
Beeckman, J.W. and Froment, G.F. 1979. Catalyst Deactivation by Active SiteCoverage and Pore Blockage. Ind. Eng. Chem. Fundamen. 18(3): 245-256. doi:10.1021/i160071a009.
Curtis, C., Kopper, R., Decoster, E., Guzmán-Garcia, A.,Huggins, C., Knauer, L., Minner, M., et al. 2002. Heavy Oil Reservoirs.Oilfield Review 14 (3): 30-51.
Donnelly, J.K. and Pendergast, D.R. 1999. Nuclear Energy inIndustry: Application to Oil Production. Presented at the Canadian NuclearSociety's Climate Change and Energy Options Symposium, Ottawa, Canada, 17-19November. http://www.ecolo.org/documents/documents_in_english/oil-sands-nuke-Donnelly-05.pdf (accessed 7/1/2010).
Dupain, X., Gamas, E.D., Madon, R., Kelkar, C.P., Makkee, M.,and Moulijn, J.A. 2003. Aromatic Gas Oil Cracking Under Realistic FCCConditions in a Microriser Reactor. Fuel 82: 1559-1569.
Farrauto, R.J. and Bartholomew, C.H. 1997. Fundamentals ofIndustrial Catalytic Processes. London: Chapman and Hall.
Greaves, M. and Xia, T.X. 2000. Upgrading Athabasca Tar SandUsing THAI—Toe-To-Heel Air Injection. Paper SPE 65524 presented at the SPE/CIMInternational Conference and Exhibition on Horizontal Well Technology, Calgary,6-8 November. doi:10.2118/65524-MS.
Greaves, M. and Xia, T.X. 2001. CAPRI-Downhole CatalyticProcess for Upgrading Heavy Oil: Produced Oil Properties and Composition. PaperCIPC 2001-023 presented at the Canadian International Petroleum Conference,Calgary, 12-14 June. doi:10.2118/2001-023.
Greaves, M. and Xia, T.X. 2008. Stability of THAI ™Process--Theoretical and Experimental Observations. J Can Pet Technol 47 (9): 65-73. JCPT Paper No. 08-09-65. doi: 10.2118/08-09-65.
Greaves, M., El-Saghr, A., and Xia, T.X. 2000. CAPRI horizontalwell reactor for catalytic upgrading of heavy oil. Preprints - AmericanChemical Society, Division of Petroleum Chemistry 45 (4):595-598.
Hajdo, L.E., Hallam, R.J., and Vorndran, L.D.L. 1985. HydrogenGeneration During In-Situ Combustion. Paper SPE 13661 presented at the SPECalifornia Regional Meeting, Bakersfield, California, USA, 27-29 March. doi: 10.2118/13661-MS.
Meyer R.F., Attanasi, E.D., and Freeman, P.A. 2007. Heavy Oiland Natural Bitumen Resources in Geological Basins of the World. OpenFile-Report 2007-1084, US Geological Survey, Reston, Virginia. http://pubs.usgs.gov/of/2007/1084/.
Millan, M., Adell, C., Hinojosa, C., Herod, A.A. , and Kandiyoti, R. 2008. Étude de mécanismes de l'activité des catalyseursd'hydrocraquage avec fort cokage (Mechanisms of Catalytic Activity in HeavilyCoated Hydrocracking Catalysts). Oil & Gas Science and Technology - Rev.IFP 63 (1): 69-78. doi:10.2516/ogst:2007081.
Moore, R.G., Laureshen, C.J., Ursenbach, M.G., Mehta, S.A.,Belgrave, J.D.M., Weissman, J.G., and Kessler, R.V. 1999. A Downhole CatalyticUpgrading Process for Heavy Oil Using In Situ Combustion. J Can PetTechnol 38 (13): 96-72.
Petrobank Energy and Resources Ltd. 2008. News Release:Petrobank Announces Operational Update, 15 January 2008, http://www.petrobank.com/webdocs/news_2008/PBG_2008_01_15.pdf(accessed 13 July 2010).
Reyniers, M.-F., Berinaert, H., and Marin, G.B. 2000. Influence of cokeformation on the conversion of hydrocarbons: I. Alkanes on a USY-zeolite.Applied Catalysis A: General 202 (1): 49-63. doi:10.1016/S0926-860X(00)00450-6.
Sanford, E.C. 1994. Molecular approach to understanding residuum conversion.Ind. Eng. Chem. Res. 33 (1): 109-117. doi:10.1021/ie00025a015.
Sangrama, K.S, Siddharth, S.R, and Singh, I.D. 2004. Structuralcharacterization of coke on spent hydroprocessing catalysts used for processingof vacuum gas oils. Applied Catalysis A: General 278 (1):83-91. doi:10.1016/j.apcata.2004.09.028.
Shah, A., Fishwick, R., Wood, J., Leeke, G., Rigby, S., andGreaves, M. 2010. A review of novel techniques for heavy oil and bitumenextraction and upgrading. Energy Environ. Sci. 3 (6): 700-714. doi: 10.1039/B918960B.
Stosur, G.J., Waisley, S.L., Reid, T.B., and Marchant, L.C.1998. Tar Sands--Technology, Economics and Environmental Issues forCommercial Production beyond the Year 2000. Paper No. 1998-002 presented at the7th UNITAR International Conference on Heavy Oil and Tar Sand, Beijing, 27-30thOctober.
Weissman, J.G. 1997. Review of processes for downhole catalytic upgrading ofheavy crude oil. Fuel Processing Technology 50 (2-3):199-213. doi:10.1016/S0378-3820(96)01067-3.
Xia, T.X. and Greaves, M. 2001. 3-D Physical Model Studies ofDownhole Catalytic Upgrading of Wolf Lake Heavy Oil Using THAI. Paper CIPC2001-017 presented at the Canadian International Petroleum Conference, Calgary,12-14 June. doi:10.2118/2001-017.
Xia, T.X., Greaves, M., Werfilli, M.S., and Rathbone, R.R.2002. THAI Process--Effect of Oil Layer Thickness on Heavy Oil Recovery. PaperCIPC 2002-027 presented at the Canadian International Petroleum Conference,Calgary, 11-13 June. doi:10.2118/2002-027.
Zeuthen, P., Bartholdy, J., Wiwel, P., and Cooper, B.H. 1994. Formation ofCoke on Hydrotreating Catalysts and its Effect on Activity. Studies inSurface Science and Catalysis 88: 199-206. doi:10.1016/S0167-2991(08)62741-X.