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 2 Demulsification and dehydration effects of inversely emulsified crude oil with a water content of 30% by different systems under the condition of 85 °C and 5 h.

Name Dosage/ (mg·L-1) Dehydration rate/% Sample appearance after demulsification Nanofluids permeation flooding system 150 51.00 Limpid at the bottom; clear oil-water contact 300 84.44 500 88.89 700 93.33 Market- available water-soluble demulsifiers 150 20.00 Limpid at the bottom; clear oil-water contact 300 35.00 500 51.00 700 84.00