Study on Amphiphilic Polymer for Salt Thickening and Emulsification in High Salt Heavy Oil Reservoir

With the development of non-thermal technology for high salt heavy oil reservoirs, amphiphilic polymer has become a good chemical agent due to its emulsification of heavy oil and flow control characteristics. In order to adapt to the harsh conditions of high salinity and improve the emulsification ability of polymer, this paper independently synthesized a salt thickening amphiphilic polymer named PADtC and characterized its structure through 1H NMR. Rheometer and blender stirring were used to systematically study the properties of rheological and heavy oil emulsification viscosity reduction. The results indicated that PADtC had excellent high salt resistance performance. PADtC exhibited special salt thickening characteristics. It has excellent emulsification viscosity reduction ability for heavy oil at a concentration of 1500 mg·L−1, with a viscosity reduction rate of up to 98%. The prepared heavy oil emulsion had a particle size of 22 μm and concentrated in distribution. The research results can provide new products for the non-thermal technology of high salt heavy oil reservoirs.