Abstract

Effective and uniform placement of treatment fluid across multiple zones can be challenging. This is particularly true during stimulation or remedial treatments for formation sand control, as well as during water shutoff treatments. Such challenges can be greatly enhanced when a long interval sand formation is largely heterogeneous. Good diversion technology is often what dictates treatment success. Current laboratory methods used to study diversion at downhole conditions can leave a large gap between laboratory and actual operational results. A recent midscale laboratory study involving a new complex multizone formation testing system has helped provide a method for closely simulating downhole conditions.

This paper describes a new laboratory testing setup, which allows an effective dynamic study of diversion. The new testing apparatus allows for evaluation of different critical parameters, such as concentration, temperature, and pressure on the diversion mechanism. Results are presented for laboratory case studies of diversion during different scenarios, including formation sand/fines control treatment and water shutoff treatment. The results generated can provide insight to help bridge the gap between a laboratory study and operations encountering multiple zones.

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