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1.
West Africa field deployment
An offshore field in West Africa suffered from wax deposition
in the tubing resulting in frequent wireline scrapping, particularly
during the cold season (six months)
Around 10 candidates wells displayed this problem in the last
150 meters of the completion, with production profiles in the
range of 20 to 60 m3/d. In the pilot well, the production drop
after scrapping occurred quite rapidly. |
Anticor
PA 500
is deployed in this well at a dosage of 500 ppm, during the cold season.
A continuous injection of the chemical is carried out via the gas
lift facility.
During the treatment periods, no wireline operations for wax removal
is needed (see graph below)
West
African well's rate of production
2.
Tunisia pipeline treatment
A 80 Km, 8 inch pipeline carries a blend of mixed crudes from different
fields in Tunisia.
One of the crudes being transported is very paraffinic (85% of the
total flow). As a consequence of the wax deposition in the pipeline,
pigging operations had to be performed twice a week, resulting in
around 300 to 600 Kg of removed wax after each pigging.
After injection of Anticor PA 500
at a 100 ppm dosage, the deposited wax is reduced to 50 to 70 Kg per
week, thus achieving a significant reduction of the fouling.
Organic deposition control