Table 2. Drilling Fluid Formulation of WBM.

material	amount (g)	function
water	290	base fluid
defoamer	0.08	anti-foam agent
XC-polymer	1.5	viscosity control
bentonite	4	viscosity control
starch	6	fluid loss control
KCl	20	clay stabilizer
KOH	0.3	pH control
CaCO3	5	bridging material
barite	200	mud density