BG Group said that the ninth Tupi exploration well, designated as 3-BRSA-854-RJS (3-RJS-678), offshore Brazil has discovered light oil.

The well was drilled at a water depth of 2 152m, approximately 295km off the coast of the Rio de Janeiro state, and 11km southeast of well 3-RJS-646 (3-BRSA-496), where drill stem testing is being conducted in pre-salt reservoirs.

Oil samples taken during wireline tests in well 3-RJS-678 confirmed the presence of a light (approximately 28 degree API) oil accumulation.

The well encountered a 128m reservoir section and located the oil/water contact in the Tupi accumulation at the deepest of the potential depths previously being considered, further reducing uncertainty in estimating hydrocarbon volumes for the Tupi area.