Dynamic characteristics and influencing factors of CO2 huff and puff in tight oil reservoirs

TANG Xiang,LI Yiqiang,HAN Xue,ZHOU Yongbing,ZHAN Jianfei,XU Miaomiao,ZHOU Rui,CUI Kai,CHEN Xiaolong,WANG Lei

Table 1 Designed CO2 huff and puff experiment schemes on the square core.

No. Quantity of CO2 injected/g Soaking time/h Injection rate/(mL•min-1) Throttle opening degree/% Recovery factor/% 1 15.71 24.00 4.00 60 3.13 2 11.77 24.00 4.00 60 2.85 3 8.32 24.00 4.00 60 2.55 4 5.64 24.00 4.00 60 2.04 5 1.68 24.00 4.00 60 1.55 6 15.71 0.25 4.00 60 1.62 7 15.71 2.00 4.00 60 2.13 8 15.71 4.00 4.00 60 2.55 9 15.71 14.00 4.00 60 3.09 10 15.71 48.00 4.00 60 3.48 11 15.71 24.00 4.00 20 3.85 12 15.71 24.00 4.00 40 3.33 13 15.71 24.00 4.00 80 2.08 14 15.71 24.00 4.00 100 1.18 15 15.71 24.00 0.02 60 3.27 16 15.71 24.00 0.14 60 3.18