Paper: CARBONATE ACIDIZING IN THE PERMIAN BASIN CASE HISTORIES

Carbonate formations are predominate in the Permian Basin and as such are commonly stimulated with acids. Success of an acid treatment is dependent on knowledge of the reservoir, design techniques and execution; and emphasis on obtaining good zone coverage. Case histories of acid stimulation, with production results, are presented covering San Andres and Devonian horizontal wells and deep hot Ellenburger wells. Treatments varied from high rate matrix to hydraulic fracturing operations. Discussed are key issues to overcome in order to obtain an effective stimulation and methods employed, with particular emphasis on zone coverage.