Table 3 Formation water compositions.

From: A novel formulation of an eco-friendly calcium nitrate-based heavy completion fluid

NH4 (mg/L)

SO4 (mg/L)

NO3 (mg/L)

NO2 (mg/L)

F (mg/L)

Br (mg/L)

Cl (mg/L)

PO4 (mg/L)

27.7

185

15

0.071

0.38

290

105.64

0.04