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Surface-active Polymer is a novel multifunctional active polymer for chemical flooding in mature oilfield, and the mechanism of enhancing oil recovery by Surface-active Polymer flooding is to be further studied. Performance of enlarging swept volume for enhancing oil recovery by Surface-active Polymer flooding has been evaluated in this paper. The effect and contribution rate of mobility control of Surface-active Polymer flooding for enhancing oil recovery were tested firstly, and then microscopic experiments on enlarging swept volume based on microetching models have been carried out, and macroscopic evaluation of enlarging swept volume based on heterogeneous models with cores grouped in parallel was carried out. Mobility control effect and plugging by emulsifying make Surface-active Polymer have significant performance of enlarging swept volume. Enlarging swept volume both on the macroscopic and the microscopic is the basic principle of Surface-active Polymer flooding for enhancing oil recovery.

Performance of enlarging swept volume by Surface-active Polymer flooding for enhancing oil recovery