Preparation and Characterization of Hydrophobic-Associated Microspheres for Deep Profile Control in Offshore Oilfields

Table 3

Reaction conditions of terpolymer microspheres.

Identification code	AM (g)	DMC (g)	DEA (g)	DEA mol%	Sp60 (g)	Tween 60 (g)	Liquid paraffin (g)	H2O (g)
MADD-0.0	16.98	13.44	0	0	19.25	2.145	120	55
MADD-0.16	16.60	13.16	0.55	0.16	19.25	2.145	120	55
MADD-0.22	16.46	13.07	0.75	0.22	19.25	2.145	120	55
MADD-0.28	16.33	12.96	0.95	0.28	19.25	2.145	120	55
MADD-0.34	16.20	12.87	1.15	0.34	19.25	2.145	120	55

Ammonium persulfate and sodium sulfite were used as redox initiators at the concentrations of 0.55 and 1.1 w/w% (monomer mass), respectively. N,N-methylene-bis-acrylamide (0.47 w/w% monomer mass ) was used as a crosslinking agent.