NESSE SBM#6 IWC - Intelligent Well Completions Installation & Well Control Challenges Benni Toldo - Completions Engineer Woodside - Perth, Australia.

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Presentation transcript:

NESSE SBM#6 IWC - Intelligent Well Completions Installation & Well Control Challenges Benni Toldo - Completions Engineer Woodside - Perth, Australia

Slide 2 Well Control during IWC installation IWCs are typically installed without a reservoir isolation barrier (eg FIV) String motion generated from rig heave can induce to a well influx Main parameters affecting the swabbing effect: - Rig motion (heave and amplitude) - Completion design: Flow paths across the completion - Clearances: flow areas open to fluid movement - Wellbore Fluid viscosity P swab < P res risk of well influx Looking for other Operator’s experience

Slide 3 Well Control during IWC installation Run In hole Upward string movement can swab the formation gas Wellbore Influx Annulus isolation with control lines across could be problematic gas Well Killing Can we kill all the zones effectively and proceed landing the completion? gas Kill fluid

Slide 4 Well Control during IWC installation Swabbing effect is greater for 3+ zone completions Risk is higher for gas wells Risk Mitigations: Running Speed Increase overbalance Packer Clearance Control fluid viscosity Impose rig heave restrictions How do we model this? Any experience good/bad to share?

Slide 5 Marine Riser Seabed Sea Level Rig Floor BOP Marine Riser Tensioners SFT Surface Flow Tree THRT Tubing Hanger Smart completion Surface Downhole Potential for swabbing the formation Reservoir communication during completion installation Well Control during IWC installation