Barra Energia announces conclusion of the Atlanta Field’s second high productivity well


Barra Energia announced the conclusion of the drilling and testing of the well 7-ATL-3H-RJS, the second successful horizontal oil producer of the Atlanta Field development. The Atlanta Field is one of the two oil accumulations under development in Block BS-4, the other being the Oliva Field. Barra Energia holds a 30% interest in the block, in partnership with Queiroz Galvão Exploração e Produção S.A. with 30% participation and which is the block operator, and OGX Petróleo e Gás S.A. with the remaining 40%.

Located in approximately 1,500m of water depth the well was drilled to a total measured depth of 3,560m. A horizontal section of 835m was successfully drilled through the oil zone, which consists of high quality Eocene sandstone reservoirs with very high porosity and permeability. The horizontal part of the well was then cased with screens and gravel packed.

A Drill Stem Test (DST) performed in this well confirmed the high productivity that had been obtained in the first production well recently completed, an extremely relevant result given the operational constraints existing in both well tests. Even more significantly, the DST in well 3H was successfully conducted with the electrical submersible pump (ESP) located at the sea bottom rather than at the reservoir level. If this technology is adopted for the full development of Atlanta field, this option can provide significant operational cost reduction. This result establishes that the two horizontal development wells drilled so far will flow at the upper limit of the originally estimated productivity range of 6,000bopd to 12,000bopd per well.

In view of the excellent results obtained in the two horizontal development wells drilled in the Atlanta Field the partnership proceeded to contract a FPSO with processing capacity of up to 30k b/day for the Phase I development of the field. The arrival of the FPSO on location is expected to occur in the fourth quarter of 2017 with first oil during the first quarter of 2018.