Challenges for Jubarte Permanent Seismic System

Petrobras is going to install its first permanent reservoir monitoring system. The chosen area was Jubarte, a giant field discovered in January 2001 which reserves were estimated to be approximately 510 million barrels. The field is located in the northern portion of the Campos Basin, off the southern coast of the State of Espírito Santo, 77 Km offshore, at a water depth of 1,185 to 1,365 meters. The target is to monitoring oil and water flows inside the reservoir and pressure changes due to the injection (close to injecting wells and to oil/water contact) and to the production (close to the horizontal wells in the upper portion of the reservoir). Possible discontinuities, which would impact the flow and that couldn’t be identified using regular 3D seismic data, will be revealed by 4D seismic data as an anomaly limit for difference volumes. Project developed at Research Center enabled a public bid for a full solution, including project, installation, seismic acquisition and processing and system operation and maintenance, with a fiber optics solution. Control 4D Room was installed in P-57 platform, a FPSO which have a production capacity of 180,000 barrels per day of oil and compression of 2 million cubic meters per day of natural gas. The unit will be interconnected with 22 wells. Installation occurred last October in a Brazilian shipyard, just before the platform left for travelling to the final site. Subsurface system will be installed on March 2012.