Brazilian oil and gas firm OGX Petroleo e Gas Participacoes (OGX) has completed the cased hole drillstem test in the 1-OGX-18-RJS well, located in the BM-C-40 block in the shallow waters of the Campos Basin.

The OGX-18 well, Inga prospect, was drilled to a depth of 2,260m, resulting in the detection of hydrocarbons in both the sandstone reservoirs of the Santonian section and in the carbonate reservoirs of the Albian section.

The company said that this cased hole drillstem test was performed in sandstone reservoirs of the Santonian accumulation in order to verify the reservoir’s characteristics under dynamic conditions.

The test was considered conclusive, and the pressure and flow data, as well as permo-porosity conditions, confirm the potential production of between 8,000 and 12,000 barrels of oil per day in each vertical well and between 25,000 and 35,000 barrels per day in each horizontal well.

This test also allowed the evaluation of the oil gravity which is of 27° API with the static pressures measured being normal with no indication of depletion.

This test is an important step for the better understanding of both the reservoir and the development of future production projects in the region.

OGX holds a 100% working interest in this block.