August 29, 2019

In collaboration with Devon Canada (now CNRL), we developed a tool to quantitatively risk-rank steam assisted gravity drainage (SAGD) wells for subsurface barrier integrity based on identified damage mechanisms and associated, readily available influential attributes or proxy attributes.

Such a tool can aid significantly in identifying:

  • Wells at a higher risk of casing and cement sheath damage or failure;
  • Specific mechanism and barrier at risk;
  • Associated diagnostic, mitigation steps and resources to deploy to achieve optimal benefit; and
  • A means to support the transparent identification, communication and tracking of risk levels and actions related to wellbore integrity.

On behalf of authors Todd Zahacy of C-FER Technologies and Barkim Demirdal of CNRL, Brian Wagg will be presenting the summary of this development at the upcoming SPE Annual Technical Conference and Exhibition in Calgary, Alberta at ePoster Screen G on Monday, September 30, 2019.

You will learn about the approach and workflow to develop the risk-ranking model, which is based on the probability of failure and associated consequences, as well as hear about how it was applied by Devon Canada in their commercial Jackfish Lake SAGD project, and the aspects of the model and supporting data identified for on-going advancement.

The paper-“Risk-ranking Approach for Thermal Well Integrity Using Readily Available Application, Well and Operational Parameters”, will be available through SPE’s OnePetro following the presentation.

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