Preparation of Oil-Based Foam Gel with Nano-SiO₂ as Foam Stabilizer and Evaluation of Its Performance as a Plugging Agent for Fractured Shale

Table 3

The influence of cross-linking agent DB on gel.

The amount of cross-linking agent DB	1%	2%	3%	4%
Gel formation time (min)	72	67	50	50
Strength of the gel	B	C	D	D