01 - wc overview, risk management & barriers

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  • 7/25/2019 01 - WC Overview, Risk Management & Barriers

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    IADC WellSharpSupervisor Level

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    a better learningexperience

    Short term effects...?

    NEGATIVE IMPACTS OF well control events?

    Long term effects?

    https://www.google.com/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRxqFQoTCMKgxKma-scCFcwMkgodaIwNRw&url=https://www.modelmayhem.com/forums/post/794658&bvm=bv.102537793,d.aWw&psig=AFQjCNE8OmOEgYPJQMWluW_gpDSt11LcKA&ust=1442446232523054
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    WHAT IS WELL CONTROL ABOUT?

    What is the main control mechanism available when we drill oil and gas wells?

    What happens when the main control mechanism fails?

    Why does this happen?

    What can I do to prevent it from happening?

    What do I need to know about things that happen in the well?

    What precautions should I be aware of in relation to well control?

    WELL CONTROL TRAINING

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    BARRIERS AGAINST HUMAN ERROR (Risk Analysis Models)

    The Swiss Cheese model of accident causation is a model used in riskanalysis and risk management.

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    Examples of barriers against Human Error:

    Procedural barrieres

    Checking drilling mud weights.

    Trip sheet

    Challenging response procedures (being told to dosomething you know is wrong).

    Setting alarms correctly.

    Following correct testing procedures and intervals.

    HUMAN ERROR

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    Do Check

    To ensure you have just done theright thing

    Requires actions from memory

    Use after a crisis (Well Shut-In)

    Read Do

    Pre-planned use

    To ensure no critical steps aremissed

    Use before a critical activity(Handover, Tripping)

    RISK MANAGEMENT (Check Lists)

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    BARRIERS

    Drilling, coring and tripping with shearable string

    Stab-in Safety Valve

    Primary Barrier ________

    Secondary Barrier ________

    Blue Red

    Blue

    Red

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    A Well Barrier Element is

    Well Barrier envelope is ...

    BARRIERS

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    Lets have a break?