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

Table 5

CDIF-FSDIF flowback performance of the shielding ring.

Working fluid class	Rock samples	Stratum	Fractures width (μm)	Zd (%)	Before acidification (MPa)/ (%)			After acidification (MPa)/ (%)			Remarks
					0.5	1	1.5	0.1	0.5	1
FSDIF	1#	P2ch	61.1	100.00	87.72	89.34	—	98.35	110.28	—	Fracture
	2#	P2ch	20.3	99.86	88.07	90.56	—	88.72	120.83	—	Fracture
	3#	T1f	—	99.71	71.23	91.35	—	73.86	105.37	—	Block
CDIF	8#	T1f	49.6	99.99	71.23	75.41	—	67.35	80.26	98.32	Fracture
	9#	P2ch	41.8	99.96	59.25	83.14	90.73	61.28	95.61	93.45	Fracture
	10#	T1f	—	99.83	69.57	94.28	—	61.43	104.52	—	Block