Innovative Adaptation of Subsea Test Tree Successfully Tests Ultra Deep Water Wells in the Campos Basin Brazil

摘要

Testing and gathering data from a well to evaluate thernpotential of a new field is a common practice in the oil and gasrnindustry. However, performing this task in a subsearnenvironment to test a well in ultra deep water presentsrnsignificantly greater challenges to the operator and servicernproviders. Since testing in the depths required for the subjectrnwell had not previously been attempted, there were concernsrnof problems that might occur in maintaining response timesrnand control of the test equipment.rnThis paper will present the innovative solution that wasrndevised to perform the evaluation testing in the deepestrnoffshore producing well in the world (1,853 meters or 6,079rnfeet) from a drill ship with conventional subsea equipment.rnThe equipment, the well, location conditions, and proceduresrnthat were used to safely and efficiently perform the evaluationrntesting will be discussed.rnTo date, this has been the deepest well in which thisrnfunction has been successfully performed. From the wellrntesting data gathered, the Petrobras Reservoir Engineering andrnGeology Departments were able to determine productionrnpotentials, which indicated that this was the most importantrndiscovery of the last few years, as well as to obtainrninformation that would be invaluable for field development.rnIt is anticipated that the field will have an estimated oilrnproduction of 180,000 BOPD and 4.8 mm m3 of gas by thernyear 2,000.