Conducting the acidizing procedure: Difference between revisions

The pressure and rate chart of the acid treatment show the effect of acid volume on the formation as the acid treatment proceeds. The papers of McLeod and Coulter, <ref name="r2" /> Paccaloni ''et al.'', <ref name="r3" /> and Prouvost and Economides<ref name="r4" /> are significant to the on-site evaluation of acidizing treatments. On-site data monitoring follows and evaluates the progress of damage removal by acid. '''Fig. 3'''<ref name="r3" /> shows injection rate and pressure plotted on a precalculated chart of pressure vs. rate and crossplotted with a family of skin-factor curves based on steady-state injection. The successive points clearly show the reduction in skin factor. These plots may be somewhat misleading because pressure transients are ignored after rate changes; however, no on-site computer is required.