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  • Extending the reach of ERD: How far can we go?


    P. Fischer and V.Schmidt

    The “E” in ERD, (Extended Reach Drilling) will eventually stand for “extreme.” ER wells test the limits of technology and require considerable modeling on the technical feasibility of well construction. A recent Offshore Technology Conference session brought together the latest thinking on extended-reach drilling. This is mostly a synopsis of that session. Perhaps the best way to present the session is to break it down into the various components of conventional well construction: planning, rig selection, mud requirements, drillstring, casing, cementing, logistics and HSE considerations. THE DRIVERS AND LIMITS Drilling the world’s longest extended reach well gives a company a reputation for being on the cutting edge. That, and bragging rights. This is the case with the recent new world record extended reach well, the Z-11 on Sakhalin Island. Drilled into Chayvo field by ExxonMobil (Exxon Neftegas Ltd.), the well, at 37,016 ft, has the longest MD of any ER well.

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