Brazilian state-run oil company Petrobras has halved the time and cost of drilling a well in mature post-salt fields, offshore Brazil, Kallanish Energy reports.
Using its patented True One Trip Ultra Slender (TOTUS) concept, the firm drilled a well in 44 days in early July, compared to the historic average of the field of 96 days.
The shorter drilling time led to a 50% cost reduction to roughly $30 million. Petrobras said it could potentially save around $20-35 million per well, between 2021 and 2025.
TOTUS consists of drilling the well in only three phases (Ultra Slender) and the completion installed in a single maneuver (True One Trip). The technique differs from traditional configurations of four or five drilling phases, and two or more maneuvers to install the completion, the firm explained.
The new well was drilled and completed in the Golfinho field, in the Espirito Santo Basin. The concept can only be used in certain mature fields of the post-salt formation.
Also on Tuesday, Petrobras announced a new production record in the Buzios field, in the Santos Basin. The pre-salt field produced 674,000 barrels of oil per day and 844,000 barrels of oil equivalent per day on July 13.
The Buzios field is the largest deepwater oilfield in the world. Discovered in 2010, the asset holds substantial reserves, low risk, and low lifting costs.
This post appeared first on Kallanish Energy News.