Abstract Espadarte Field is located in Campos Basin at about 110 km offshore of Rio de Janeiro state, Brazil. The water depth ranges from 750 to 1,500 m and its ring fence has an area of 720 km2. The Espadarte field exploitation strategy comprises 8 producers and 5 injectors and was developed using subsea vertical, deviated and horizontal wells, all they producing to the FPSO Espadarte. These wells produce from 4 oil reservoirs with maximum thickness of 53 m and saturated with 29° API oil and the production started in August 2000. Water injection started in 2001 and it is the main drive mechanism to replace the reservoir energy, having the field an active aquifer as well. In 2002, after the seawater breakthrough, a production decline was observed and Barium and Strontium Sulphates scale were detected. After that, the seawater injection was stopped in order to provide a Scale Control Plan, based on a remote inhibitor squeeze treatment. During the seawater injection interruption, an intense production decline and pressure reduction in the reservoirs was observed. In 2005, the injection was resumed and improvements in production and reservoir pressure were observed immediately. In 2007, a study to increase the seawater injection in the field was conducted to anticipate the production. From this study, several parameters were analyzed, including the reservoir fracture pressure, the capacities of water injection and treatment at the production facility, the wells injectivity index and the quality of injected water. These parameters are monitored by technical teams including reservoir, production operation and lifting & flow people. This paper presents the methodologies adopted to increase the seawater injection in the Espadarte Field Module I. It is discussed the reservoir management and the results obtained with the reservoirs pressurization, namely production anticipation and stability of the process.