A new HYSYS model for underground gasification of hydrocarbons under hydrothermal conditions

Handle URI:
http://hdl.handle.net/10754/597340
Title:
A new HYSYS model for underground gasification of hydrocarbons under hydrothermal conditions
Authors:
Alshammari, Y.M.; Hellgardt, K.
Abstract:
A new subsurface process model was developed using the ASPEN HYSYS simulation environment to analyse the process energy and gasification efficiency at steady-state equilibrium conditions. Injection and production wells were simulated using the HYSYS pipe flow utilities which makes use of the Beggs and Brill flow correlation applicable for vertical pipes. The downhole reservoir hydrothermal reactions were assumed to be in equilibrium, and hence, the Gibbs reactor was used. It was found that high W/C ratios and low O/C ratios are required to maximise gasification efficiency at a constant hydrocarbon feed flowrate, while the opposite is true for the energy efficiency. This occurs due to the dependence of process energy efficiency on the gas pressure and temperature at surface, while the gasification efficiency depends on the gas composition which is determined by the reservoir reaction conditions which affects production distribution. Another effect of paramount importance is the increase in reservoir production rate which was found to directly enhance both energy and gasification efficiency showing conditions where the both efficiencies are theoretically maximised. Results open new routes for techno-economic assessment of commercial implementation of underground gasification of hydrocarbons. © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Citation:
Alshammari YM, Hellgardt K (2014) A new HYSYS model for underground gasification of hydrocarbons under hydrothermal conditions. International Journal of Hydrogen Energy 39: 12648–12656. Available: http://dx.doi.org/10.1016/j.ijhydene.2014.05.182.
Publisher:
Elsevier BV
Journal:
International Journal of Hydrogen Energy
Issue Date:
Aug-2014
DOI:
10.1016/j.ijhydene.2014.05.182
Type:
Article
ISSN:
0360-3199
Sponsors:
Authors would like to thanks KAUST and the Saudi Royal Commission for Jubail and Yanbu for sponsoring this project. Mr. Alshammari would also like to thank Prof. Geoffrey Maitland for research guidance and support.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorAlshammari, Y.M.en
dc.contributor.authorHellgardt, K.en
dc.date.accessioned2016-02-25T12:31:04Zen
dc.date.available2016-02-25T12:31:04Zen
dc.date.issued2014-08en
dc.identifier.citationAlshammari YM, Hellgardt K (2014) A new HYSYS model for underground gasification of hydrocarbons under hydrothermal conditions. International Journal of Hydrogen Energy 39: 12648–12656. Available: http://dx.doi.org/10.1016/j.ijhydene.2014.05.182.en
dc.identifier.issn0360-3199en
dc.identifier.doi10.1016/j.ijhydene.2014.05.182en
dc.identifier.urihttp://hdl.handle.net/10754/597340en
dc.description.abstractA new subsurface process model was developed using the ASPEN HYSYS simulation environment to analyse the process energy and gasification efficiency at steady-state equilibrium conditions. Injection and production wells were simulated using the HYSYS pipe flow utilities which makes use of the Beggs and Brill flow correlation applicable for vertical pipes. The downhole reservoir hydrothermal reactions were assumed to be in equilibrium, and hence, the Gibbs reactor was used. It was found that high W/C ratios and low O/C ratios are required to maximise gasification efficiency at a constant hydrocarbon feed flowrate, while the opposite is true for the energy efficiency. This occurs due to the dependence of process energy efficiency on the gas pressure and temperature at surface, while the gasification efficiency depends on the gas composition which is determined by the reservoir reaction conditions which affects production distribution. Another effect of paramount importance is the increase in reservoir production rate which was found to directly enhance both energy and gasification efficiency showing conditions where the both efficiencies are theoretically maximised. Results open new routes for techno-economic assessment of commercial implementation of underground gasification of hydrocarbons. © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipAuthors would like to thanks KAUST and the Saudi Royal Commission for Jubail and Yanbu for sponsoring this project. Mr. Alshammari would also like to thank Prof. Geoffrey Maitland for research guidance and support.en
dc.publisherElsevier BVen
dc.subjectEnergy efficiencyen
dc.subjectGasification efficiencyen
dc.subjectHydrothermal conditionsen
dc.subjectSubsurface systemen
dc.titleA new HYSYS model for underground gasification of hydrocarbons under hydrothermal conditionsen
dc.typeArticleen
dc.identifier.journalInternational Journal of Hydrogen Energyen
dc.contributor.institutionImperial College London, London, United Kingdomen
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