Experimental study on the oil production characteristics during the waterflooding of different types of reservoirs in Ordos Basin, NW China

XIAO Wenlian,YANG Yubin,LI Min,LI Nong,YOU Jingxi,ZHAO Jinzhou,ZHENG Lingli,ZHOU Keming,REN Jitian,WANG Yue

Table 1 Basic physical properties, pore throat parameters, and experimental design of experimental cores.

Sample	Porosity/ %	Permeability/ 10^-3 μm²	Average pore radius/μm	Average throat radius/μm	Average pore-throat radius ratio	Pore variation coefficient	Throat variation coefficient	Conversion coefficient/ (ms·μm^-1)	Experiment type	Reservoir type
Z55-2	11.391	30.32	210.95	8.65	47.19	0.188	0.189	0.290	NMR-based plunger core waterflooding experiment	Low permeability (Yan 9 Member)
Z55-3	10.935	11.91	-	-	-	-	-	-	Microscopic visualized waterflooding experiment	Low permeability (Yan 9 Member)
L352-5	13.270	3.65	163.28	2.92	116.05	0.166	0.127	0.610	NMR-based plunger core waterflooding experiment	Extra-low perMeability (Chang 6 Member)
L352-7	12.640	7.40	-	-	-	-	-	-	Microscopic visualized waterflooding experiment	Extra-low perMeability (Chang 6 Member)
L49-3	11.738	0.85	141.15	1.45	210.10	0.129	0.105	0.699	NMR-based plunger core waterflooding experiment	Ultra-low permeability (Chang 6 Member)
L49-2	12.670	0.87	-	-	-	-	-	-	Microscopic visualized waterflooding experiment	Ultra-low permeability (Chang 6 Member)