In order to maintain the reservoir pressure and enhance the recoveryfactor, water injection method has been employed by Vietsovpetro over the past years. This method was first used in 1987 for targets in lower Miocene in Bach Ho field. One year later, it was utilized in lower Oligocene layers and then reservoirs in the basement. Nowadays, the method has been widely applied in almost all oil and gas fields operated by Vietsovpetro. Thanks to scientific calculation, reasonable implementation and adherence to the reservoir development requirements, the apparatus for maintaining reservoir pressure by water injection has been optimized. Until 01/01/2011, according to the data of the 1998 technological scheme, the recovery factor is 17 percent but the real factor is 23-32 percent instead
the accumulated production of oil since production commencement is 189,9 million tons
263,3 million cubic meters of processed water have been injected and 22.387,6 million cubic meters of gas have been transported onshore.