Noncondensable gas steam-assisted gravity drainage

Canbolat, S
Akın, Serhat
Kovscek, AR
To investigate steam-assisted gravity drainage (SAGD) mechanisms, experiments with and without carbon dioxide or n-butane mixed with steam were conducted in a scaled physical model. It is packed with crushed limestone premixed with a 12.4degrees API heavy-oil. Temperature, pressure, production data, and the asphaltene content of the produced oil were monitored continuously during the experiments. For small well separations, the steam condensation temperature and the steam-oil ratio decreased as the amount of carbon dioxide increased. The heavy oil became less mobile in the steam chamber due to lower temperatures and more viscous oil. Thus, the heating period was prolonged and the cumulative oil recovery as well as the recovery rate decreased. Less oil recovery was obtained as the fraction of carbon dioxide injected increased. Little or no change in oil recovery. and the rate of oil recovery, was observed for greater well separations regardless of the fraction of carbon dioxide in the injection gas. Similar behavior was observed when n-butane was injected along with steam instead of carbon dioxide. Cumulative oil recovery, rate of oil recovery, and steam-oil ratio decreased independent of well separation compared to a reservoir with no initial noncondensable gas.


Multiphase-flow properties of fractured porous media
Rangel-German, Edgar; Akın, Serhat; Castanier, Louis (Elsevier BV, 2006-05-16)
Water-air imbibition and oil-water drainage displacements were conducted using a laboratory flow apparatus in fractured sandstone systems. During the experiments, porosity and saturation were measured along the core using a Computerized Tomography (CT) scanner. 3-D saturation images were reconstructed to observe matrix-fracture interactions. Differences in fluid saturations and relative permeabilities caused by changes of fracture width have also been analyzed. In the case of water-air imbibition, narrower ...
Thermal characterization of crude oils by pressurized differential scanning calorimeter (PDSC)
Kök, Mustafa Verşan; Nurgaliev, Danis K. (Elsevier BV, 2019-06-01)
In this research, pressurized differential scanning calorimeter (PDSC) were used to estimate the thermal and kinetic behaviour of two different crude oils from Tatarstan oil fields under three different pressures (100, 600, 2000 kPa) at a constant heating rate (10 degrees C/min). The heat flow curves of both crude oils indicated two reaction regions known as low temperature oxidation (LTO) and high temperature oxidation (HTO). The reaction intervals were shifted to lower temperature regions with the increas...
Sensitivity Analysis of Major Drilling Parameters on Cuttings Transport during Drilling Highly-inclined Wells
Ozbayoglu, E. M.; Miska, S. Z.; Takach, N.; Reed, T. (Informa UK Limited, 2009-01-01)
In this study, a layered cuttings transport model is developed for high-angle and horizontal wells, which can be used for incompressible non-Newtonian fluids as well as compressible non-Newtonian fluids (i.e., foams). The effects of major drilling parameters, such as flow rate, rate of penetration, fluid density, viscosity, gas ratio, cuttings size, cuttings density, wellbore inclination and eccentricity of the drillsting on cuttings transport efficiency are analyzed. The major findings from this study are,...
Altun, Naci Emre (Estonian Academy Publishers, 2009-01-01)
The particle surface characteristics of oil shale and the changes in these characteristics with increasing fineness were determined. FTIR and electro-kinetic studies showed that the surfaces of oil shale particle were controlled by oxygen-rich polar groups. FTIR and XPS studies showed that with increasing fineness the polar oxides decreased and organic surface groups increased at grind sizes finer than 100 microns. Flotation was used to view the impact of the changes in surface characteristics on oil shale ...
Cyclic Large Strain and Induced Pore Pressure Models for Saturated Clean Sands
Çetin, Kemal Önder (American Society of Civil Engineers (ASCE), 2012-03-01)
Semiempirical probabilistic models are described to assess cyclic large strain and induced excess pore-water pressure responses of fully saturated clean sands. For this purpose, available cyclic simple shear and triaxial tests were compiled and studied. The resulting r(u) versus gamma, and gamma versus N databases are composed of 101 and 84 cyclic test data, respectively. Key parameters of the proposed r(u) and gamma models are defined as critical shear strain, relative density, effective confining stress, ...
Citation Formats
S. Canbolat, S. Akın, and A. Kovscek, “Noncondensable gas steam-assisted gravity drainage,” JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, pp. 83–96, 2004, Accessed: 00, 2020. [Online]. Available: