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Type: Journal article
Title: Taking advantage of injectivity decline for improved recovery during waterflood with horizontal wells
Author: Bedrikovetski, P.
Nguyen, T.
Hage, A.
Ciccarelli, J.
Ab Wahab, M.
Chang, G.
de Souza, A.
Furtado, C.
Citation: Journal of Petroleum Science and Engineering, 2011; 78(2):288-303
Publisher: Elsevier Science BV
Issue Date: 2011
ISSN: 0920-4105
Statement of
Pavel G. Bedrikovetsky, Thi K.P. Nguyen, Andrew Hage, John R. Ciccarelli, Mohammad ab Wahab, Gladys Chang, Antonio Luiz S. de Souza, Claudio A. Furtado
Abstract: Injectivity formation damage with waterflooding using sea/produced water has been widely reported in the North Sea, the Gulf of Mexico and the Campos Basin in Brazil. The damage is due to the capture of solid and/or liquid particles by reservoir rock that consequently leads to the permeability decline. Another reason for the permeability decline is the formation of a low permeable external filter cake. However, moderate injectivity decline is not too damaging for a waterflood project with long horizontal injectors, where the initial injectivity index is high. In this case, the injection of raw or poorly treated water may significantly reduce the cost of water treatment, which is a cumbersome and expensive procedure in offshore projects. In this paper we investigate the effects of injected water quality on waterflooding using horizontal wells. An analytical model for injectivity decline, which accounts for particle capture and a low permeable external filter cake formation, has been implemented into black oil reservoir simulator. It was found that induced injectivity damage results in a noticeable reduction of water cut and in increased (although delayed) sweep efficiency.
Keywords: Injectivity
Raw water
Sweep efficiency
Waterflood simulation
Rights: Copyright © 2011 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.petrol.2011.05.020
Published version:
Appears in Collections:Aurora harvest 5
Australian School of Petroleum publications

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