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

Table 8

SASP perforated layer thickness and permeability distribution [72].

Number	Sublayer	Average perforation thickness(m)		Perforated layer thickness ratio (%)	Effective permeability(D)
		Sandstone	Effective
1	SII1	0.03	0.02	0.3	0.159
2	SII21	1	0.6	7.9	0.466
3	SII22	1.2	0.8	10.7	0.548
4	SII3	0.3	0.2	3.1	0.515
5	SII4	1	0.6	8	0.499
6	SII5 + 6^1	0.4	0.2	3.2	0.629
7	SII5 + 6^2	0.2	0.1	1.2	0.489
8	SII7	1.6	1.3	16.4	0.663
9	SII8^1	2.7	2.2	28	0.766
10	SII8^2	1.8	1	13.5	0.754
11	SII9	0.8	0.6	7.7	0.769
Sum	10.6	7.7		100	0.67