In 1994, when Occidental took over
the Idd el Shargi North Dome (ISND) oil field, it had been producing
for more than 20 years. Production rates were only 20,000 barrels
of oil per day.
As a leader in enhanced oil recovery processes, Occidental approached
the offshore project using the most advanced techniques possible.
And during 1998, the production rate reached 138,000 barrels
of oil per day. Moreover, operating and overhead costs were nearly
cut in half over the same period, dropping from $5.52 per barrel
to $2.85 per barrel.
New seismic techniques, used in surveying more than 66 square
miles, delivered quality data, allowing our engineers and geoscientists
to develop accurate reservoir simulations. Combined with the
latest computer technologies and complex stratigraphic schemes,
optimum well designs and reservoir management techniques were
developed.
Among the first improvements were upgrades to the drilling rigs
and equipment used in the operation. Precise pre-drilling borehole
designs, improved well geometrics and casing programs resulted
in better production performance while reducing drilling costs
by millions of dollars.
During the actual drilling operations, Occidental provided compact
wellhead systems, used smaller bits, improved fluid systems and
advanced milling techniques for slot recovery. Floating mud caps
were used to minimize fluid loss and formation damage during
reservoir penetration.
Advanced multi-lateral well bore drilling and geo-steering drill
bit guidance also improved oil production and water injection
rates. These methods provided access to reservoirs over maximum
intervals having optimum rock characteristics - all accomplished
with fewer wells and dramatically lower costs.
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