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

Table 5

Blocking efficiency of microspheres in the cores.

Sample	10^−3 μm^2							RF		RFF
		Point1	Point2	Point1	Point2	Point1	Point2	Point1	Point2	Point1	Point2
MADD-0.0	241.5	0.01	0.0067	0.43	0.27	0.093	0.073	43.0	29.3	9.3	7.9
MADD-0.22	246.9	0.01	0.0067	0.47	0.35	0.15	0.12	47.3	37.1	15.0	12.9

Note: the microspheres were dissolved by injection water, and test temperature was 45°C.