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Page 61: of Maritime Reporter Magazine (April 1998)
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INTERNATIONAL OFFSHORE TECHNOLOGY mgmm HHHH mmmm jects, Hydro's Fram and Grane fields, Amoco's Valhall water injec- tion scheme and BP's Ula Triassic.
Statoil To Inject Life Into
Norwegian Northern Sea
Statoil plans to use new tech- nology to improve oil recovery on the Norwegian continental shelf (NCS). As reported in Maritime
Week (sister publication to
Maritime Reporter & Engineering
News), the company believes the campaign could lift NCS recover- able oil reserves by around five bil- lion barrels by 2005. "We have set ambitious goals but we believe they are achiev- able," said Sigve Haaland, sector manager of major petroleum tech- nology projects. "In the 1980s peo- ple said it was impossible to drill wells at more than 60 degrees (from the vertical), now we're at 90 degrees (horizontal)."
The Norwegian Petroleum
Directorate has set a goal for recovery rates of 50 percent for oil and 75 percent for gas, far above typical world rates for oil of between 20 and 40 percent. Mr.
Haaland said "smart wells" and increased water and gas injection would account for a large part of the gains.
Smart wells include horizontal drilling, which can now extend up to almost 10 km, branched wells — when the well splits into branches producing from different parts of a reservoir, and side-tracking.
The company has reportedly already used branched wells — a technique designed for draining the last drops from mature wells — at the Statfjord and Yme fields and plans to drill one at Gullfaks, three at Statfjord, two at Sleipner
West and one at Heidrun in 1998.
Another technique Statoil will apply at Gullfaks, Statfjord and
Yme is re-entry, or sidetracking, where coil-tubing is fed into an already-spudded well, which is then drilled out of the well wall and into new areas of the reser- voir. One advantage to side- tracking is that it avoids the cost of drilling new wells and revital- izes "dead" wells. It also avoids problems of slot capacity on the platform. Statoil will also attempt to improve reservoir management via remotely-operated wells, which requires installing a "sleeve" in the well, which can be controlled from the platform. The "sleeve" can be opened and closed at different junctions to maximize flow and drainage from the reservoir.
San Diego Welcomes 1998
SNAME Annual Meeting
The San Diego Concourse will host the Society of Naval Achitects and Marine Engineers (SNAME) 1998 Annual Meeting and
International Marine Exposition from November 11-14, 1998. The event includes participation in the
Year of the Ocean, as part of the
United Nation's year-long effort to raise global awareness of the ocean's role in the world today, as well as tomorrow. A full confer- ence program and exposition will focus on all aspects of research, design, production, maintenance and operation of ships, sub- mersibles, yachts, boats, offshore and ocean bottom structures, hydrofoils and surface effect ships.
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