Characteristics and EOR mechanisms of nanofluids permeation flooding for tight oil

DING Bin,XIONG Chunming,GENG Xiangfei,GUAN Baoshan,PAN Jingjun,XU Jianguo,DONG Jingfeng,ZHANG Chengming

Table 1 Interfacial activity between different chemical agents of 0.1% concentration and Xinjiang tight oil at the test temperature of 85 °C.

Chemical agent Interfacial tension equilibrium value/(mN·m-1) Time for reaching the equilibrium/min Heavy alkylbenzene sulfonate 0.330 26 Betaine 0.025 7 Nanofluids permeation flooding system 0.025 4