Synthesis And Druging Performance Evaluation Of Thermal Stability And Resistance Hydrogenation Agent Polymer

Currently, most polymers for polymer flooding exist some problems when used in high temperature or high salinity reservoirs. In order to improve the salt resistant, temperature tolerance and stability of the acrylamide-based copolymer, a double tailed acrylamide hydrophobically associating polymer (DTHAP) was synthesized. Then, the properties of DTHAP were researched.According to the analysis of the structures of the existed hydrophobic monomers, a new molecular design theory was brought forward, that is by introducing benzene ring to the hydrophobic chains and using a double tailed structure and its unique structure can improve the thickening, temperature tolerance and salt resistance of polymers. In the direction of this theory, a new double tailed hydrophobic monomer, which is not reported in literatures, was designed. The monomer PETMAM (N-phenethyl-N-tetradecylmethacrylamide) was synthesized. Then, the structure of the monomer was characterized by FT-IR and NMR.The double tailed acrylamide hydrophobically associating polymer was synthesized by photoinitiated micellar polymerization. The structure of the polymer was characterized by FT-IR, UV, HMR and SEM. The factors influenced on the polymerization were researched on the basis of the preparation of polyacrylamide, including the dosage of acrylic acid, salt (NaCl), hydrophobic monomer and surfactant (sodium dodecyl sulfate, SDS).The solution properties of polymer, containing temperature sensibility, salt sensibility, rheological property, anti-ageing property and viscoelasticity, were measured by using viscometry as the main measurement. The experiment results indicated that DTHAP was superior to HPAM as a kind of oil displacement agent for enhanced oil recovery, especially in high-temperature and high-mineralization oil fields.On the basis of the solution properties of polymer, the displacement experiments were conducted, in which different concentration of polymer in various salt water were taken into consideration at80℃. The results show that DTHAP-14can remarkably enhance16.9%of the oil recovery ratio.