Laboratory investigation of co-precipitation of CaCO3/BaCO3 mineral scale solids at oilfield operating conditions: Impact of brine chemistry | Oil & Gas Science and Technology

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Table 2

Brine compositions and experimental conditions for co-precipitation of CaCO₃/BaCO₃ on the surface of tube reactor at the condition of 80 °C, 1 bar and 1 M NaCl.

Exp. #	Ca²⁺ mg L⁻¹	Ba²⁺	HCO₃ ⁻	Ca:Ba	CaCO₃	BaCO₃	pH^b	Flow rate
Exp. #	Ca²⁺ mg L⁻¹	mg L⁻¹	mg L⁻¹	Molar ratio	SI^a	SI^a		mL h⁻¹
Precipitation-1	78.2	0	238.2	NA	1	NA	8.7	100
Precipitation-2	78.2	0	238.2	NA	1	NA	8.7	4
Precipitation-3	78.3	240.5	238.2	1:1	1	1	8.7	4
Precipitation-4	81.1	4221.8	245.6	1:15	1	2	8.7	4

The reported SI values are calculated at the experimental conditions of 80 °C and 1 bar.

pH values were measured at an ambient condition of 23 °C and 1 bar.

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