Preventing and inhibiting sulfate deposits in oilfield installations. The application on a Sahara area

Among the main problems raised by water injecion in oilfields, the physiocochemical opposition prevailing between injected water and field water is certainly still the one which is the worst mastered at explitation level. The deposits and the corrosions produced or encouraged by the various precipitation reactions generate degradations which are often irreversible and particularly noxious for the reservoir rock and for the deep production equipments as for the surface ones. Within the framework of research and development work, carried out at the French Petroleum Institute, related to injection and productivity of wells, this article presents the convincing results of a test carried out in full injection and productivity of wells, this article presents the convincing results of a test carried out in full injection-size with a inhibitor of barium sulfate deposits, specifically adapted to the hard production conditions of a field in south Algeria.