The Synthesis Of Ternary Sulphonated Polyacrylamide And The Displacement Performance Evaluation

At first, this paper adopts the composite initiator system was prepared by acrylamide(AM) / 2- propylene phthalein amine- 2- methyl propane sulfonic acid(AMPS) binary sulphonated polyacrylamide, volume of 0.3 m L. The amount of AIBA for 0.05 m L for optimum synthesis conditions. On the basis of the introduction of the first through the analysis of different different influence factors on the influence of sulfonated PAM aqueous solution viscosity, finally it is concluded that the optimal conditions of synthesis. Binary sulfonated polyacrylamide optimum synthesis condition is: the ratio of monomer AM: AMPS for 4:16(mass ratio), the amount of chain extender to 5 m L, p H value of 8, the dosage of the EDTA of 1.0 m L, urea dosage 0.4 mL, sulfur dosage of sodium fluoride was 0.3 m L, Ammonium persulfate of sulfonated poly propylene amide monomer synthesis three yuan, the introduction of the third monomer by N, N- dimethyl acrylamide, styrene sulfonate, methyl acrylic acid and ethyl 2-(dimethyl amine), styrene, acrylic acid, methyl acrylic acid, N, N- dimethyl amino ethyl ester. Analysis of different monomer synthesis of ternary copolymer solution apparent viscosity change, it is considered that the methyl acrylic acid, N, N- dimethyl ethyl amino modification of AM/AMPS/DMAEMA effect is best, so choose the ternary sulfonated monomer synthesis polypropylene amine to carry out the experiment to evaluate oil displacement.First the experimental evaluation of the sulfonated polymer liquid flow characteristics, effective permeability homogeneous core using artificial to around 3000×10-3μm2、1600×10-3μm2、200×10-3μm2, proved that the sulfonated polymer and sulfonated polymer after adding complexing agent in the process of displacement can be steady pressure, resistance coefficient and residual resistance coefficient increases with the increase of polymer concentration and, improve the mobility ratio and reduce the ability of reservoir permeability;In the average permeability is 1600×10-3μm2, the variation coefficient of 0.72 man-made start displacement experiment on heterogeneous cores, analysis of concentration respectively, bivalent ions concentration, salinity, temperature on the influence of sulfonated polyacrylamide, under the condition of 80, choose resistance to salt, low opening, opening shape and high sulfonated polymer displacement experiments to analyze the change of the recovery, proved that the sulfonated polymer under the condition of high temperature and high salinity has improved recovery ability, and at this temperature displacement effect is superior to the other three kinds of polymer; Finally, the ternary sulphonated polyacrylamide adding complexing agent triethanolamine, sodium gluconate, sodium thiosulfate, antioxidants that if the best compound with higher recovery rate, at the same time can be on the basis of original increased by 7.3%.