Development Performance and Pressure Field Evolution of ASP Flooding

Table 3

Formula of each slug in ASP flooding.

Stage	Injection volume	Mass fraction (%)
		Polymer	Surfactant	Alkaline
Preflush slug	0.08 PV	100	0	0
ASP main slug	0.3 PV	98.5	0.3	1.2
ASP auxiliary slug	0.2 PV	98.9	0.1	1
Postprotection slug	0.2 PV	100	0	0