Formulation Development of High Strength Gel System and Evaluation on Profile Control Performance for High Salinity and Low Permeability Fractured Reservoir

Table 5

The results of oil displacement experiment in different plugging depth.

Profile control	Core permeable category	Plugging depth; (cm)	Permeability; (mD)	Average porosity; (%)	Average saturation (%)	Recovery before plugging; (%)	Recovery after plugging; (%)	EOR by gel; (%)	Total recovery (%)
No plugging	High	0	301.5	20.77	64.50	—	34.62	—	25.3
	Low		10.1	17.36	55.8	—	14.42	—
The first plugging	High	10	300.8	20.45	64.55	34.62	44.3	9.68	34.39
	Low		10.3	17.33	55.57	14.42	22.81	8.39
The second plugging	High	20	300.4	20.21	63.24	44.3	51.83	7.53	41.64
	Low		9.8	17.24	55.15	22.81	29.74	6.93
The third plugging	High	30	303.3	21.66	65.71	51.83	53.2	1.37	45.07
	Low		10.1	17.52	56.68	29.74	35.58	5.84