Perforation Inflow Diagnostic (PID) Tests are an excellent, and cost effective, method for obtaining a quality estimation of initial reservoir pressure conditions. As the name implies, these tests are conducted during or immediately after perforating – so reservoir pressure transients are limited. Subsequent completion, stimulation, clean-up, and testing operations often seriously affect our ability to acquire quality pressure build-up data for analysis. Using subsurface pressure recorders will also satisfy ERCB Initial Pressure Gas (IP Gas) and Initial Pressure Oil (IP Oil) requirements (as per Bulletin 2010-38). These tests can be evaluated with the Perforation Inflow Test Analysis (PITA) and Slug methods – so they do not have to satisfy the Board’s 2 kPa Rule. In our example eREPORT the recorders were hanging below a wireline retrievable (WR) bridge plug, which reduces wellbore storage effects, and is a better technique for low permeability formations.