Alkali Effect on Alkali-Surfactant-Polymer (ASP) Flooding Enhanced Oil Recovery Performance: Two Large-Scale Field Tests’ Evidence

Table 15

Designed ASP scheme.

Test	Pre-slug concentration (mg/L) 0.0375 PV	ASP main slug			ASP vice slug			Post P slug concentration (mg/L) 0.2 PV	Injection rate (PV/a)	Predicted IORF (%OOIP)
		0.3 PV			0.15 PV
		A	S	P	A	S	P
		(%)	(%)	(mg/L)	(%)	(%)	(mg/L)
SASP	1300	1.2	0.3	2000	1	0.1	1800	1000	0.2	21.7
WASP	1350	1.6	0.3	1800	1.4	0.1	1800	1350	0.2	22.2