Removal of Hematite Water-Based Filter Cake Using Hydrochloric Acid

Table 1

Drilling fluid formula.

Material	Quantity	Unit
Water	245	cm^3
Defoamer	0.08	cm^3
Soda ash	0.5	gm
Xanthan gum	0.5	gm
Starch	6	gm
Bentonite	4	gm
KOH	0.5	gm
PAC-R	1.5	gm
KCl	20	gm
CaCO3 (50 microns)	5	gm
Hematite	350	gm