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Type: Journal article
Title: Well injectivity decline for nonlinear filtration of injected suspension: Semi-analytical model
Author: Vaz, A.
Bedrikovetski, P.
Furtado, C.
de Souza, A.
Citation: Journal of Energy Resources Technology, 2010; 132(3):033301-1-033301-9
Publisher: ASME-Amer Soc Mechanical Eng
Issue Date: 2010
ISSN: 0195-0738
Statement of
A. S. L. Vaz, P. Bedrikovetsky, C. J. A. Furtado and A. L. S. de Souza
Abstract: Injectivity decline due to injection of water with particles is a widespread phenomenon in waterflood projects. It happens due to particle capture by rocks and consequent permeability decline and also due to external cake formation on the sandface. Since offshore production environments become ever more complex, particularly in deep water fields, the risk associated with injectivity impairment due to injection of seawater or re-injection of produced water may increase to the point that production by conventional waterflood may cease to be viable. Therefore, it is becoming increasingly important to predict injectivity evolution under such circumstances. The work develops a semi-analytical model for injectivity impairment during a suspension injection for the case of filtration and formation damage coefficients being linear functions of retained particle concentration. The model exhibits limited retained particle accumulation, while the traditional model with a constant filtration coefficient predicts unlimited growth of retained particle concentration. The developed model also predicts the well index stabilization after the decline period.
Keywords: Injectivity
formation damage
analytical model
well index
deep bed filtration
Rights: Copyright © 2010 by ASME
DOI: 10.1115/1.4002242
Appears in Collections:Aurora harvest 5
Australian School of Petroleum publications

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