A methodology for the design of the diversion stages of matrix acidizing jobs is presented. The resistance to flow induced by a cake of diverting agent deposited at the sandface of a single core has been measured in the lab under a large variety of conditions, representative of those encountered downhole.

The experimental data are then combined with a numerical model to yield a design tool for diversion jobs, which enables to predict the flow distribution due to diverters in multi-layered formations, according to both reservoir and diverter properties.

Finally, results obtained with the model are presented, to demonstrate how it can be used to optimize the volume of diverter slugs in matrix acidizing treatments.

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