| abstract |
A method and system (1) for water injection into an oil and/or gas containing subterranean formation is shown, the method comprising: arranging a submerged water filtration station (2) with a pump (3) feeding inlet seawater (4) through at least one filtering membrane to a water injection pump (5), subjecting the water to ionizing irradiation (16) at a location between the seawater inlet (4) and the water injection pump (5), whereby at said location the water is guided past a submerged radiation source (17) which is distributed for penetration of the body of injection water. |