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

Table 12

Dead oil physical feature comparison.

Oil layer	Density (g/cm^3)	Viscosity (mPa·s)	Freezing point (°C)	Wax content (%)	Resin content (%)	Sulfur content (%)	Original gas-oil ratio (m^3/t)	Volume factor	Saturation pressure (MPa)
SASP	0.864	23.5	24.8	17.01	21.41	0.07	47.9	1.07	9.5
WASP	0.865	16.6–90.0	22–30	20.1–32	23.03	<0.2	47.4–50	1.12	9.77–10.69