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gas-invaded-zone
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Experimental study and modeling of gravity drainage during WAG process in fractured carbonate rocks
, Article Iranian Journal of Chemistry and Chemical Engineering ; Volume 27, Issue 3 , October , 2008 , Pages 103-113 ; 10219986 (ISSN) ; Badakhshan, A ; Taghikhani, V ; Rashtchian, D ; Gotbi, C ; Sajadian, V. A ; Sharif University of Technology
2008
Abstract
The experimental study and modeling of gravity drainage during Water Alternative Gas Injection, WAG process, in carbonate rock for one of the Iranian off-shore reservoir at lab-scale were carried out. The mechanism of gravity drainage during the WAG process, and its contribution to the oil recovery in the fractured carbonate reservoirs were also studied. In the WAG process alternatively gas is injected during the process and gravity drainage could be happened. Changes in the block dimensions, rock properties, oil properties, gas properties, and fractures properties and their effect on the amount of oil recovered during the gravity drainage mechanism were studied. It would be worth mentioning...
Analytical Modeling of Oil Production from a Matrix Block by Free Fall Gravity Drainage
, M.Sc. Thesis Sharif University of Technology ; Masihi, Mohsen (Supervisor) ; Ghazanfari, Mohammad Hossein (Supervisor) ; Kharrat, Reyaz (Supervisor)
Abstract
Free fall gravity drainage is one of the most effective mechanisms of producing the oil from the matrix blocks in the gas invaded zone of the naturally fractured reservoirs. Although several analytical models have been proposed to characterize this mechanism in a matrix block, but these models suffer from the practical or theoretical viewpoints. In this study, a new analytical model was presented to predict the oil production rate versus time from a homogeneous matrix block under free fall gravity drainage mechanism. The model was developed by considering the balance between involved forces in the gas-oil gravity drainage process. By simplifying the equation derived from the momentum...
Analytical modeling of oil production from a matrix block by free fall gravity drainage mechanism
, Article Energy Exploration and Exploitation ; Volume 31, Issue 6 , October , 2013 , Pages 821-832 ; 01445987 (ISSN) ; Ardakany, M ; Ghazanfari, M ; Sharif University of Technology
2013
Abstract
Free fall gravity drainage is the most effective mechanism in gas invaded zone of fractured reservoirs. Although several analytical models have been proposed to characterize this mechanism, most of them suffer from inadequate reality, such as neglecting capillary pressure. In this study, a new analytical model was proposed to predict the oil recovery versus time for a homogeneous matrix block under a free fall gravity drainage mechanism. Considering the effect of viscous, gravity as well as capillary forces, the model was developed. This model is applicable to different conditions of gravity and capillary force, as well as when both forces are active. Along with core scale experimental data...