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 2

The influence of cross-linking agent DEA on gel.

The amount of cross-linking agent DEA	0	1%	2%	3%
Gel formation time (min)	—	78	49	67
Strength of the gel	A	B	C	C