During a Well Integrity Check:

• Each operational step in well construction / completion / abandonment is analyzed separately and further sub-steps are added if needed;
• All possible hydrocarbons’ paths to surface in each step are identified
• The presence of a sufficient number of well barriers per each path is checked
• The testing programme for each well barrier is planned/checked

During design projects, the Risk Register is kept up to date with the outcome of the barrier diagrams checks at all steps in the project, with increasing definition of risk causes, safeguards and mitigation measures as the project progresses.

Barrier Diagrams and Risk Register are prepared according to ISO_DIS_16530-1 Well Integrity Guidelines, or to the Client's standard.

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