DESIGN OF MATRIX TREATMENTS 5.0 4.8 4.6 4.4 4.2 4.0 v) a 3.8 3.6 3.4 3.2 3.0 2.8 Acid Volume Injected (gal) Figure G-2-Skin-effect reduction for a range of injection volumes (h= 100 ft; therefore, divide by 100 to obtain gal/ft). G-5