 This paper reviews the current understanding of fluid flow in naturally fractured reservoirs, NFRs. It focuses on the processes of spontaneous imbubition, SI, and its impact on oil recovery. The paper also discusses the importance of studying the fracture matrix interactions and the effects of wetability on imbubition. Finally, it highlights the need for further research into the use of low salinity water, LSW, injection as an enhanced oil recovery, the technique. This article was authored by Marzan Karamova, Rezy Kashiri, Payman Parashiri, and others.