Post sagd in-situ combustion hybrid recovery method for oil-sands reservoirs

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dc.contributor.advisorMaini, Brij B.
dc.contributor.advisorMoore, R. Gordon
dc.contributor.authorPaitakhti Oskouei, Seyed Javad
dc.date.accessioned2017-12-18T22:29:55Z
dc.date.available2017-12-18T22:29:55Z
dc.date.issued2012
dc.descriptionBibliography: p. 261-270en
dc.descriptionThesis is in colour.en
dc.description.abstractCurrent in-situ thermal recovery methods, Steam Assisted Gravity Drainage (SAGD) and In Situ Combustion (ISC), have limitations which restrict their application in the heavy oil reservoirs. There are also a variety of undesirable environmental challenges associated with these existing techniques. To address some of these issues, hybrid technologies that attempt to synergistically combine both types of thermal processes were recently proposed. Since reported numerical simulation studies were unreliable due to large uncertainties in the mode of combustion occurring and the combustion kinetics, laboratory experiments were performed to evaluate the feasibility of the idea. A two­dimensional physical model was designed and fabricated with type-316 stainless steel to simulate the process. Eight Steam Assisted Gravity Drainage, experiments were completed at a representative reservoir pressure to validate the integrity of equipments and to investigate the effect of initial gas saturation, and high initial water and oil saturations in the SAGD operation. It was concluded that higher initial water and gas saturation negatively affected the process and reduced the oil recovery factor. Heat loss from the physical model was significantly increased and the heat transfer mechanism within the matrix was changed from conduction into convection. Subsequently, four hybrid experiments were completed with different air injection strategies like air injection into the SAGD chamber, and Top-Down combustion. The results proved the feasibility of the idea to implement ISC in the mature SAGD chamber. Total oil recovery factor was increased by 10 percent when combustion was restricted to the previously formed SAGD chamber. It was concluded that combustion within the existing steam chamber would be a solution to maintain the pressure in the mature SAGD chamber and to prevent non-desirable steam migration in the SAGD pattern. Implementing ISC in the growing SAGD chamber raised oil recovery by 20 percent. It is predicted that there is a potential to raise oil recovery factor by 40 percent if the whole pattern is swept.
dc.format.extentxxiv, 270 leaves : ill. ; 30 cm.en
dc.identifier.citationPaitakhti Oskouei, S. J. (2012). Post sagd in-situ combustion hybrid recovery method for oil-sands reservoirs (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/4680en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/4680
dc.identifier.urihttp://hdl.handle.net/1880/105681
dc.language.isoeng
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.titlePost sagd in-situ combustion hybrid recovery method for oil-sands reservoirs
dc.typedoctoral thesis
thesis.degree.disciplineChemical and Petroleum Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameDoctor of Philosophy (PhD)
ucalgary.item.requestcopytrue
ucalgary.thesis.accessionTheses Collection 58.002:Box 2075 627942919
ucalgary.thesis.notesUARCen
ucalgary.thesis.uarcreleaseyen
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