Synthesis and Interface Activity of a Series of Carboxylic Quaternary Ammonium Surfactants in Hydraulic Fracturing

Table 1

The major physical properties of Yanchang Oilfield Chang 6 crude oil.

H^30 (mPa·s)	Pour point, (°C)	^20 (g·cm^-3)	Resin (Wt%)	Asphaltene (Wt%)	Wax (Wt%)	Aromatic hydrocarbons (Wt%)	Saturated hydrocarbons (Wt%)
188	20.2	0.892	18.16	6.40	0.78	28.02	46.64