BG Group (25%) and partners Petrobras (65% and operator) and GALP (10%) have completed two drill stem tests (DSTs) on the Iracema well (4-RJS-647 or 4-BRSA-711-RJS) in the BM-S-11 appraisal area in the Santos Basin pre-salt, offshore Brazil.
DSTs were carried out over two zones with aggregate production amounting to 10 500 bpd of light 32° API oil and 17 million standard ft3/d (mmscfd) of gas. Flow rates were facilities constrained.
The Iracema appraisal well has confirmed the presence of an excellent quality light oil bearing reservoir, 33 km northwest of the original Tupi discovery well (1-RJS-628A or 1-BRSA-369A).
The well in-flow performance recorded during the tests was the highest achieved so far in BG Group's Santos Basin interests. Ultimately, development well flow rates of up to 50 000 bpd of oil equivalent are anticipated; these rates being constrained by production facilities rather than reservoir performance.
The characteristics of the pre-salt carbonate reservoirs in BG Group's concessions, confirmed by recent appraisal wells, have a highly significant positive influence on expected well recoveries, well density, development capital expenditure and project economics.
Further evaluation of the well data is ongoing and work on field development options has been initiated. BG Group and its partners will continue the activities and investments foreseen in the evaluation plan approved by the Brazilian National Petroleum Agency (ANP), including the drilling of further wells in the area.
Iracema, in the BM-S-11 appraisal area, was drilled to a depth of 5000 m and completed in September this year. It is located in 2210 m water depth, approximately 250 km off the coast of the State of Rio de Janeiro.