Hybrid system and method for treating produced water and seawater to be re-injected into subsea oil reservoir

The invention relates to a water treatment system for producing and treating seawater for secondary recovery in an oil well. The present invention provides a hybrid system for treating produced water and seawater for reinjection into an offshore oil reservoir and an associated hybrid water treatment method. The water to be treated is introduced into a treatment module (20) comprising a microfiltration/ultrafiltration membrane or into a water treatment module comprising a nanofiltration membrane depending on the quality of the water associated with the content of oil and solids or the content of sulfate ions. The systems and methods of the present invention allow reinjection of produced water without additional treatment systems on the platform. Other advantages of the invention include reduction of offshore oil handling and reduction of installation, operation and maintenance costs at offshore equipment associated with additional systems. 本发明涉及用于生产和处理海水的水处理系统，其用于油井中的二次回收。本发明提供一种用于处理采出水和海水以重新注入离岸油储层中的混合型系统以及相关