Experimental Study and Stabilization Mechanisms of Silica Nanoparticles Based Brine Mud with High Temperature Resistance for Horizontal Shale Gas Wells

Table 3

Gel strength of the BM with or without nanoparticles at elevated temperature.

Temperature	/ (Pa/Pa)
	BM-1	BM-2	NPBM-1	NPBM-2
25°C	2/6	1.5/4	2.5/8	2.1/6
120°C	1.5/2.5	1.5/2.5	1.6/2.6	1.6/2.6
150°C	2.5/7.5	2.5/6	2.4/5	2/4
180°C	2.5/4	2.1/5.5	2/3.2	2/3.3