"The climaxes are coming rapidly on Troll these days," says Johan Kristian Mikkelsen, manager of Hydro's Troll business unit. "On April 23, Troll B had produced 500 million barrels of oil since its production start on September 19, 1995 - averaging an astonishing 208,000 barrels per day (bpd)."
Troll's total oil reserves are currently estimated to be about 1,350 million barrels, out of which 45 percent have been produced.
The 500 million barrel mark was reached just two weeks after a new production record was set at 444,000 barrels per day (bpd) from Troll B and C, underlining Troll's position as the definitively largest oil producing field in Norway.
"Troll's achievements are even more amazing when you look at the history of the field," says Mikkelsen. "In the 1980s, Troll was only considered a gas field" and "production from the thin yet enormous oil zone on the field was deemed uneconomical."
This picture radically changed because of Hydro's sustained efforts to develop well technology capable of tapping the thin oil layers, he points out.
Three key technological elements made oil recovery on Troll highly economical:
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