Laboratory Research on Fracture-Supported Shielding Temporary Plugging Drill-In Fluid for Fractured and Fracture-Pore Type Reservoirs

Table 4

Evaluation results of the temporary plugging performance of the shielding ring.

Rock samples	Stratum	Fractures width (μm)	(min)/ (ml)				(min)/Zd (%)	Expected temporary plugging rate (%)	Remarks
			7.5	15	30	60	15
1#	P2ch	61.1	0.18	0.18	0.21	0.22	100	99.94	Fracture
2#	P2ch	20.3	0.15	0.44	0.58	0.58	99.86	98.39	Fracture
3#	T1f	—	0.07	0.27	0.31	0.35	99.71	98.72	Block