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The University of Calgary master and doctoral theses archive. Full text is made available when possible.
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Browsing Graduate Studies by Department "Chemical Engineering"
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Item Embargo A Combustion tube for investigation of in-situ oil recovery(1976) Harding, Thomas G.; Moore, R. GordonItem Embargo A Fluidized bed retort for the extraction of oil from oil sands(1978) Trenkwalder, Andreas E.; Donnelly, John K.Item Open Access A hybrid approach applied to an industrial distillation column that compares physical and neural network modeling techniques(1997) Sabharwal, Amish; Svrcek, William Y.Item Embargo A Mathematical model for the prediction of wellbore heat loss and pressure drop in steam injection wells(1980) Fontanilla, Jerry P.; Aziz, KhalidSteam drive project design requires the condition of steam at the sandface before it enters the formation to obtain the recoverable oil as a result of this thermal oil recovery process. Several analytical wellbore heat loss models can be found in the literature, but they are made with numerous simplifying assumptions. A need for a comprehensive and rigorous model for the prediction of wellbore heat loss and pressure drop including the effects of gravity, friction, and kinetic energy for quantitative analyses therefore came into being. The mathematical model is developed by combining the continuity equation, the total energy equation, the mechanical energy equation or the extended Bernoulli equation, and the heat loss equation and reducing them to two first order differential equations in terms of the pressure gradient (dP/dz) and steam quality gradient (dx/dz). These equations are solved numerically in this thesis by the Fourth Order Runge Kutta method. The steam properties are read off directly from the steam tables obtained from Faires (1962). The pressure and steam quality at each mesh point along the injection tubing string are solved for in a step-wise manner until the depth reaches the sandface or the formation depth. An investigation of the two-phase pressure drop correlations for downward steam flow is also done. The Aziz, Govier and Fogarasi correlation, which is a correlation for upflow was modified for downflow in the bubble flow and slug flow patterns, but in the annular flow and mist flow there is no need for modification as a no slip condition is assumed. It was found that the Yamazaki and Yamaguchi correlation does not work for a steam system with liquid holdup less than 10%, as it predicts huge friction pressure drop in this range. An investigation was also conducted to see if existing correlations could be modified to improve their accuracy. It was found that Yamazaki and Yamaguchi's hydrostatic head correlation could be adjusted to match experimental data when frictional contribution is calculated with the Duns and Ros method. The limited testing done here shows that the Beggs and Brill correlation is the most reliable of all existing methods.Item Embargo A Non-isentropic one dimensional model for simulating decompression characteristics of high pressure multicomponent pipeline gases(1985) Picard, David J. (David James), 1959-; Bishnoi, Prithwi R.Item Embargo A Numerical study of natural convection in porous media(1968) Karra, Perayya Sastry; Aziz, KhalidItem Embargo A One-dimensional computer model for simulating oil recovery by steamflooding(1977) Ito, Yoshiaki; Aziz, KhalidItem Embargo A Sequential solution approach for the simulation of coning behaviour in petroleum reservoirs(1977) Ko, Stephen C. M.; Aziz, KhalidItem Embargo A Sequential solution approach for three-phase areal simulators(1978) Montesdeoca M., Carlos; Aziz, KhalidItem Embargo A Theoretical and experimental investigation of natural convection in porous media(1970) Holst, Peter Hans; Aziz, KhalidItem Embargo An Engineering approach to characterize hexane plus fractions in petroleum reservoir fluids(1985) Cheung, Vincent (Vincent Wing-Chuen), 1947-; Sigmund, Philip M.Item Embargo An Experimental investigation of natural convection in porous media(1972) Kaneko, Takeshi; Aziz, KhalidItem Embargo An Investigation of vaporization in the displacement of Swan Hills crude oil by rich gas(1975) Yu, Richard Kwok-Fun; Bennion, Douglas W.The vaporization of Swan Hill Crude Oil in the displac ement process by enriched gas was investigated. This study mainly investigated the compositional effect and the displacement pressure effect on the interphase mass transfer when gas was introduced to mix with the crude oil at reservoir conditions. The study indicates that vaporization of c+ 5 material is directly proportional to the richness of the injected gas. Using ah enriched gas(SO mole% of c; ), the condensing drive vaporized about 40-50% of the c+ 5 from the crude oil after 2.5 pore volumes had been injected. The vaporization of the c+ 5 will decrease as the methane component increases in concentration in the injected gas. When the methane composition is increased to 95 mole%, the vaporization will amount to approximately 10% at an injected pore volumes of 2 . 5. Al so, this study indicates that displacement pressure has a dominating effect on the degree of vaporization. When the operating pressure is increased from 2,500 psia to 3000 psia ,the vaporization of the c+ 5 is increased from 32% to about 50% when an intermediate rich gas (37.32 mole per cent c+ 2 ) is used. In this study, composition of the twd phases at equilibrium were predicted, by a minimum free energy concept in conjuction with the modified Redlich-Kwong equation of state for the gas phase and the dilated Van Laar model for the liquid phase in the calculation of phase fugai cities as proposed by Prausnitz et al(l968) ~ The binary interaction constants or parameters for the heavy ends were calculated and adjusted based on the available compositional analysis of the equilibrium mixture of Swan Hill crude oil and injected gas at various gas oil mixing ratio. The predicted composition for the vapor and liquid in the equilibrium show an absolute deviation of less than 10% for the system mixture of Swan Hill crude oil and enriched gas at 2,500 psi and 225°F. In order to simulate the steady state displacement process, a multicell separation model was used. This model incorporates the constraint of constant volume for each cell and the option of fluid transport according to the phase mobility. Recovery calculated based on this simplified model shows a good agreement with avail able experimental data in the case of condensing gas drive. For condensing gas drive, two important factors are learned to be important: vaporization and condensation. Vaporization takes place for the heavy ends and condensation for the other components. Combination of these two mechanisms accounts for the high recovery in the order of 90 to 110% as experienced in the linear sand pack displacement test, where the methane composition used in the injected gas stream varies from 45 to 55 mole percent.Item Embargo Anhydrous thermal extraction of hydrocarbons from Athabasca oil sands: in a modified fluidized-bed reactor(1978) Abdalla, Elhassan O.; Moore, R. GordonItem Open Access Butyl acetate system(1972) Arrison, Norman LeRoy; Ritter, Robert A.Item Embargo Carbon dioxide from flue gas(1983) Horner, William Norval, 1948-; Svrcek, William Y.Item Embargo Catalytic reduction of nitric oxide(1973) Lamb, Arnold; Tollefson, Eric L.Item Embargo Coal liquefaction: an economic appraisal(1979) Herring, Ian Wallace; Tollefson, Eric L.Item Embargo Comparison of some gas-liquid pipeline design method with field data(1978) Osman, Mohammed El-Sayed; Gregory, Garry A.Item Embargo Compositional modelling of displacement processes in porous media(1973) Leung, Stephen T.; Aziz, Khalid