Novel Nonylphenol Polyethoxylated Based Surfactants for Enhanced Oil Recovery for High-Mineralization Carbonate Reservoir

Surfactant flooding can mobilize trapped oil and change the wettability of rock to be more hydrophilic, which increases recovery factor. However, selection surfactants is difficult in case high salinity conditions. In this work, we synthesized three novel anionic-nonionic based on widely used nonionic surfactant nonylphenol polyethoxylated (NPEO) evaluated their efficiencies for enhanced (EOR) water (20% NaCl). The modified showed a decrease interfacial tension (IFT) up 10 times compared with precursor. All had changed hydrophilic according contact angle measurements. effectiveness was proved by spontaneous imbibition experiments, better displacement efficiency increased production 1.5–2 times. Filtration experiments an increase factor 2–2.5 comparison NPEO. These promising results prove that synthesis new modifying NPEO successful indicate these have great potential EOR reservoirs.