Preparation and Evaluation of a Profile Control Agent Base on Waste Drilling Fluid

Table 3

The parameters and results of the core experiments.

Profile control agents	Sand filling model	Porosity (%)	Permeability before profile control (D)	Percentage of water absorption before profile control (%)	Percentage of water absorption after profile control (%)	Profile improvement rate (%)
3000-PCAWDF	1#	35.9	5.83	88	53	84.6
	2#	30.5	1.05	12	47
3000-PCARW	3#	35.3	5.62	86	51	83.1
	4#	30.7	1.15	14	49
5000-PCAWDF	5#	35.8	5.74	89	40	91.8
	6#	30.4	1.07	11	60
5000-PCARW	7#	35.1	5.58	84	34	90.2
	8#	30.1	1.02	16	66