Experimental optimization of catalytic process in-situ for heavy oil and bitumen upgrading

A Shah, R P Fishwick, G A Leeke, J Wood, Sean P Rigby, Malcolm Greaves

Research output: Contribution to conferencePaper

  • 3 Citations

Abstract

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 further exploited. Toe-to-heel air injection (THAI), and its catalytic add-on (CAPRI) processes 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, such as steam-based techniques. An experimental study is reported concerning the optimization of catalyst type and operating conditions for use in the THAI-CAPRI process. Experiments were carried out using microreactors containing 10 g catalyst, with oil flow of 1 ml.min-1 and gas flow of 0.5 l.min-1, 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.

Conference

ConferenceCanadian Unconventional Resources and International Petroleum Conference 2010, October 19, 2010 - October 21, 2010
CountryCanada
CityCalgary Alberta
Period19/10/1021/10/10

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Crude oil
Catalysts
Application programming interfaces (API)
Air
Coke
Flow of gases
Gases
Flow rate
In situ combustion
Hydrogen
Temperature
Environmental impact
Dissolution
Methane
Steam
Alumina
Innovation
Oils
Recovery
Experiments

Cite this

Shah, A., Fishwick, R. P., Leeke, G. A., Wood, J., Rigby, S. P., & Greaves, M. (2010). Experimental optimization of catalytic process in-situ for heavy oil and bitumen upgrading. 514-527. Paper presented at Canadian Unconventional Resources and International Petroleum Conference 2010, October 19, 2010 - October 21, 2010, Calgary Alberta, Canada.

Experimental optimization of catalytic process in-situ for heavy oil and bitumen upgrading. / Shah, A; Fishwick, R P; Leeke, G A; Wood, J; Rigby, Sean P; Greaves, Malcolm.

2010. 514-527 Paper presented at Canadian Unconventional Resources and International Petroleum Conference 2010, October 19, 2010 - October 21, 2010, Calgary Alberta, Canada.

Research output: Contribution to conferencePaper

Shah, A, Fishwick, RP, Leeke, GA, Wood, J, Rigby, SP & Greaves, M 2010, 'Experimental optimization of catalytic process in-situ for heavy oil and bitumen upgrading' Paper presented at Canadian Unconventional Resources and International Petroleum Conference 2010, October 19, 2010 - October 21, 2010, Calgary Alberta, Canada, 19/10/10 - 21/10/10, pp. 514-527.
Shah A, Fishwick RP, Leeke GA, Wood J, Rigby SP, Greaves M. Experimental optimization of catalytic process in-situ for heavy oil and bitumen upgrading. 2010. Paper presented at Canadian Unconventional Resources and International Petroleum Conference 2010, October 19, 2010 - October 21, 2010, Calgary Alberta, Canada.
Shah, A ; Fishwick, R P ; Leeke, G A ; Wood, J ; Rigby, Sean P ; Greaves, Malcolm. / Experimental optimization of catalytic process in-situ for heavy oil and bitumen upgrading. Paper presented at Canadian Unconventional Resources and International Petroleum Conference 2010, October 19, 2010 - October 21, 2010, Calgary Alberta, Canada.14 p.
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N2 - 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 further exploited. Toe-to-heel air injection (THAI), and its catalytic add-on (CAPRI) processes 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, such as steam-based techniques. An experimental study is reported concerning the optimization of catalyst type and operating conditions for use in the THAI-CAPRI process. Experiments were carried out using microreactors containing 10 g catalyst, with oil flow of 1 ml.min-1 and gas flow of 0.5 l.min-1, 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.

AB - 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 further exploited. Toe-to-heel air injection (THAI), and its catalytic add-on (CAPRI) processes 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, such as steam-based techniques. An experimental study is reported concerning the optimization of catalyst type and operating conditions for use in the THAI-CAPRI process. Experiments were carried out using microreactors containing 10 g catalyst, with oil flow of 1 ml.min-1 and gas flow of 0.5 l.min-1, 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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