This paper presents examples of the principles of “analytics” applied to well integrity, and the experiences gained in using the results over the past 10 years to manage certain risks associated with well operations.
Analytics are implemented using a system that generates a collection of reports and are distributed daily to subscribers, including engineers, listing wells with potentially anomalous conditions. Example anomalies include wells with annuli pressure above specified operating limits, annuli missing pressure readings or defined pressure limits, and annuli exhibiting pressure behavior indicating potential communication between annuli. The analytical engine queries databases containing pressure entries, operating limits, planned actions, and other well integrity data repositories to generate the reports.
The resulting reports are a component of an integrated work process that manages wells with potential anomalies. The reports are distributed to engineers and managers for their review and initiation of appropriate actions, including annulus bleeds, well intervention tests, and risk assessments.