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

Table 7

B-1-D sediment unit [72].

No.	Deposition type	Sublayers	Unit number
1	Distributary plain sand body with low bending distributary	SII2^1, SII2^2, SII8^1	3
2	Distributary plain facies direct distributary sand body	SII7, SII8^2	2
3	Delta front facies with lump-like sand	SII1, SII3, SII4, SII5+6^1, SII5+6^2	5
4	Leading edge dendritic transitional sand body in the delta	SII9	1
In total		11