An effective matrix diversion technique for carbonate formations

The removal of formation skin damage from carbonate reservoirs is ordinaril y accomplished by stimulation with hydrochloric acid. Uniform coverage of t he zone being treated during matrix acidizing stimulations of carbonate res ervoirs is an accepted(1) requirement for successful treatment. However, th e task of achieving efficient diversion and uniform zonal coverage is often difficult because of permeability heterogeneity within the treated interva l. In this article we describe a technique that has been-used successfully to divert treating fluids in carbonate formations.