Research Papers: Petroleum Wells-Drilling/Production/Construction

Theoretical Definition of Formation Damage Zone With Applications to Well Stimulation

[+] Author and Article Information
M. Nunes

 North Fluminense State University, Lenep, Brazil;Halliburton

P. Bedrikovetsky, B. Newbery

Australian School of Petroleum,University of Adelaide

R. Paiva

 North Fluminense State University, Lenep, Brazil

C. Furtado, A. L. de Souza

 Petrobras, Brazil

J. Energy Resour. Technol 132(3), 033101 (Jun 23, 2010) (7 pages) doi:10.1115/1.4001800 History: Received November 06, 2008; Revised March 02, 2010; Published June 23, 2010; Online June 23, 2010

Flow of particulate suspension in porous media with particle retention and consequent permeability reduction is discussed. Using analytical model for suspension injection via single well, the permeability damage zone size was defined and expressed by transcendental equation. Analysis of field data shows that usually the size of damaged zone does not extend more than 1 m beyond the injector. The definition of damage zone size is used for design of well stimulation via deposition removal.

Copyright © 2010 by American Society of Mechanical Engineers
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Figure 1

Retention of particles in rock during suspension injection

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Figure 2

Different particle retention mechanisms in porous media

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Figure 3

Propagation of suspended and retained concentration profiles from injection to producing well. (a) Location of injector and producer; well, damaged, and contour radii. (b) Profiles of suspended and retained concentrations.

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Figure 4

Propagation of concentration front in plane of dimensionless distance and time (X,T)

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Figure 5

Comparison between formation damage zone size and mean distance to particle deposit

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Figure 6

Schema of perforation of damaged open-hole well and estimation of the hole length

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Figure 7

Impedance increase during waterflooding and full restoration of initial injectivity after acidizing

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Figure 8

The case of successful damaged well acidizing



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