2018 Well Abandonment Policy Issues and Knowledge Gaps

Regulation Public Policy Issue Associated Knowledge Gap(s)

GM/SCVF Source Identification and Evaluation of Impact

 

  • Improving source identification for SCVF/GM
  • This could include proposals to investigate both tools for source identification and methods to determine bleed off rates (the amount of time industry needs to wait between attempts).
  • Gas sample collection practices, sampling standards, database references.
  • Evaluating the impact of the SCVF/GM and the repair operations – looking for a cut and cap threshold
  • Looking to determine an appropriate threshold below which repair of SCVF/GM at the time of abandonment would not be required
AER’s D020
  • Investigate alternatives to permanent bridge plugs
  • Look at the longevity of all mechanical plugs and cost, identify failure points and probability of the failure
  • Assessing plug/annular cement integrity
  • Investigate the longevity of cement plugs and the integrity of the seal between the cement and the casing.
  • Establishing permanent barrier criteria
  • Conduct research to determine what would be considered a permanent barrier (inside casing):  What is considered a permanent barrier? Cement, mechanical or both?
  • Establishing vertical zonal isolation barrier criteria
  • Ensure that there is a vertical barrier inside pipe across non-completed zones that could potentially have a negative impact (i.e.: sour zones); similar to how non-completed thermal zones must be abandoned if part of a thermal scheme

AER’s D09(?) – use of cement alternatives

  • Assessment of current repair and remediation “cement” technologies for SCVF/GM
  • Determining a usable set of criteria for cement and cement alternatives to meet to be allowed to pump them for SCVF/GM Repair