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 2 Designed CO₂ huff and puff experiment schemes on the columnar core.

No.	Core size/cm		Permeability/10^-3 μm²	Porosity/%	Injection type	Soaking time/h
No.	Diameter	Length	Permeability/10^-3 μm²	Porosity/%	Injection type	Soaking time/h
17	2.5	29.8	0.97	10.41	CO₂ injection pressurization	0.25
18	2.5	29.8	0.97	10.41	CO₂ injection pressurization	48.00
19	2.5	29.8	0.99	10.42	Oil injection pressurization	0.25
20	2.5	29.8	0.99	10.42	Oil injection pressurization	48.00