Removal of Hematite Water-Based Filter Cake Using Hydrochloric Acid

Table 4

Summary of the solubility tests.

Ceramic disc properties before the filtration test
Thickness	6.40
Dry wt. (gm)	40.79
Wet wt.[saturated with brine] (gm)	48.27
After HPHT filtration
Thickness [] (mm)	8.23
Wet wt.[] (gm)	62.74
Filter cake wet wt. (gm)	14.47
Filter cake thickness (mm)	1.83
After treatment
Wet wt. after removal []	49.56
Dry wt. after removal []	42.73
Filter cake wt. after removal (gm)	1.29
Removal efficiency	91%