Enhanced Oil Recovery Mechanism And Adaptability Evaluation Of Low Salinity Water Flooding

Low salinity water flooding is an emerging enhanced oil recovery technology that plays an important role in improving oil recovery.Numerous laboratory tests from many research teams and some field applications have confirmed its effectiveness in increasing oil recovery.Since its appearance,various mechanisms have been proposed to explain the mechanism of the process.At present,onshore oil fields mainly produce water in the strata,while offshore oil fields mainly use seawater,and these injected waters have relatively high salinity.High salinity water injection can easily cause formation fouling,leading to formation blockage and a decrease in permeability.The injection of low salinity water for oil flooding is an effective method to increase oil recovery.Because of its low cost,the technology has attracted widespread attention in foreign countries,but domestic studies on it have been relatively few.Extensive research conducted in the laboratory or in the field has shown that salinity can have an effect on the movement of hydrocarbons.Based on this theoretical method,this study used nuclear magnetic two-dimensional spectrum test,PH value test,interfacial tension test and wettability test and other attribute test methods to verify the effect of low salinity water flooding oil recovery technology on enhanced oil recovery and explore low Mineralization degree The relevant mechanism of water flooding oil recovery technology,and identify the influencing factors of low salinity water flooding oil recovery technology,and to form a technical reserve of low salinity water flooding for the on-site decision-making,and finally use CMG to simulate low mineralization Degree to determine its adaptability and optimization.