Alberta’s 2 kPa Rule

For shut-in durations <14 days allows for an Initial or Annual #welltest to be submitted without analysis (#PTA). Static gradient survey and ‘single shot’ AWS data are submitted electronically to the #AER in the GRD.pas format. Gradient recorders must be on bottom at least 2.0 h (even 30 seconds shy will be rejected, so 125 minutes is suggested as a confidence measure). If using surface pressures and acoustic well sounder (AWS) confirmation of any liquid level on a gas (#LNG) well, there must be at least four shots over the 2.0 h period (i.e. every half-hour). Consultants should check all gradients for <±2.5 kPa/h/2 h compliance on site. If a file does not pass, the well should be left shut-in, and a solution determined: install recorders down-hole, conduct a second gradient at a future date, or do a follow-up AWS.