InterOil Corporation IOC announced that drill stem test
(DST) #1 in the Antelope-3 well in Papua New Guinea, tested natural gas and
condensate with a maximum gas rate of 44.8 million cubic feet of gas per day
with a flowing tubing pressure of 2,331 psi.
The Antelope-3 well was drilled conventionally from 5,321.8 feet (1,622
meters) with cumulative down hole drilling losses of 647 barrels until at
5,817 feet (1,773 meters) when there was a total loss of circulation. The well
was then drilled with managed pressure to 5,905.8 feet (1,800 meters) the
current depth.
At 5,905.8 feet (1,800 meters) the reservoir is comprised limestone and minor
dolomite similar to the upper limestone reservoir observed in the uppermost
Antelope-2 well.
Antelope-3 DST#1 utilised a casing packer set at 5,259 feet (1,602.9 meters)
in the 9 5/8" casing and tested a 584 foot (178 meter) open hole interval from
5,321.8 feet (1,622 meters) to 5,905.8 feet (1,800 meters) through several
choke sizes from 24/64 to 64/64 inch.
The well flowed at a maximum rate of 44.8 million cubic feet of gas per day
with 10.4 to 14.9 barrels of condensate per million cubic feet through a
64/64" choke. The analysed gas composition is similar to Antleope-1 and
Antelope-2.
The test was conducted through drill pipe and the gas flow rate was
significantly limited by the downhole DST equipment and the surface separation
package.
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