More than Just PTA… While PID and PIDD tests have their place as stand-alone assessment tools, this example of added value wasn’t planned that way! To shorten a long, complicated story, two zones were perforated before installing an isolation packer. The upper zone bled off to TSTM during evaluation and was going to be bypassed for tie-in. Analysis of PIDD and PID (blowdown) response suggested the upper zone actually had better permeability than the lower zone but was highly damaged. Acting upon the author’s recommendation, the zone was frac’d and came in at a flow rate 3x greater than the ‘economic’ lower zone! That’s Due Diligence.