Offshore staff
RIO DE JANEIRO – 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 mi) 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-deepwater fields high gas-oil and CO2 ratio fluids, the company said.
09/08/2020
