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MPD

MPD. Managed Pressure Drilling GF Landsbyen 2007. Outline. What is MPD Why MPD Conventional drilling vs MPD. Fracture Pressure. Pore Pressure. Time. Large Drilling Window Conventional Drilling. Bottom Hole Circulating Pressure. Small Drilling Window (Losses) Conventional Drilling.

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MPD

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  1. MPD Managed Pressure Drilling GF Landsbyen 2007

  2. Outline • What is MPD • Why MPD • Conventional drilling vs MPD

  3. Fracture Pressure Pore Pressure Time Large Drilling WindowConventional Drilling Bottom Hole Circulating Pressure

  4. Small Drilling Window (Losses)Conventional Drilling Fracture Pressure Fracture Pressure BottomHole Circulating Pressure Pore Pressure Time

  5. Small Drilling Window (Kick)Conventional Drilling Fracture Pressure Bottom Hole Circulating Pressure Pore Pressure Time

  6. Max pore pressure gradient Min frac pressure gradient Why not conventional drilling? • Small drilling window • Conventional drilling is not possible without the risk for kick or severe losses • Improved well productivity and increased net present value?

  7. MPD • Can drill with BHP ± 2,5 bar (requires automatic choke) • Experience from UBO project: ±5 bar • Normal annulus friction for drilling at 1900 m is app 0,08 sg or 15 bar. Max pore pressure gradient THIS IS POSSIBLE WITH MPD Min frac pressure gradient MPD can be the solution when small overbalance is an advantage

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