Stability analysis of the moving interface in piston- and non-piston-like displacements |
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Authors: | Yuhu Bai Jifu Zhou Qingping Li |
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Institution: | (1) Technology Research Department, CNOOC Research Center, Beijing, 100027, China;(2) Division of Engineering Sciences, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China |
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Abstract: | From the macroscopic point of view, expressions involving reservoir and operational parameters are established for investigating
the stability of moving interface in piston- and non-piston-like displacements. In the case of axi-symmetrical piston-like
displacement, the stability is related to the moving interface position and water to oil mobility ratio. The capillary effect
on the stability of moving interface depends on whether or not the moving interface is already stable and correlates with
the wettability of the reservoir rock. In the case of non-piston-like displacement, the stability of the front is governed
by both the relative permeability and the mobility ratio.
The project supported by the National Basic Research Program of China (2005CB221300), and the Innovative Project of Chinese
Academy of Sciences (KJCX-SW-L08).
The English text was polished by Yunming Chen. |
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Keywords: | Piston-like displacement Non-piston-like displacement Two-phase percolation Moving interface Stability analysis |
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