Júpiter test offshore Brazil confirms high oil quality

Petrobras has completed a drillstem test (DST) over the area of the Júpiter discovery in the presalt Santos basin offshore Brazil.

The company operates the surrounding BM-S-24 concession with an 80% interest, in partnership with Petrogal Brazil.

The DST assessed the presalt carbonate reservoirs in the Apollonia (3-BRSA-1246- RJS) well, 295 km (183 miles) from Rio de Janeiro in a water depth of 2,183 m (7,162 ft). Results confirmed strong productivity and strong flows of good quality oil.

However, the fluids have a high gas-oil ratio and CO₂ (carbon dioxide) content, which will necessitate innovative technologies to ensure commercial production.

For this reason, Petrobras will use the fluid samples to validate its patented HISEP – High Pressure Separation – technology, which involves separation and reinjection of the produced CO₂ into reservoir rocks, using equipment installed at the bottom of the sea.

HISEP is presently undergoing qualification: a pilot on the Libra block in the same basin is due to be installed in 2024 to perform longer-term tests.

If successful, it could facilitate exploration and development of other deep or ultra-deep-water fields high gas-oil and CO₂ ratio fluids, the company said.

Source: Offshore Magazine