Study on Autogenous Heat Technology of Offshore Oilfield: Experiment Research, Process Design, and Application

Table 2

Experimental data of heat generation in autogenic heat system.

Concentration (mol/L)	Peak temperature (°C)	Temperature range (°C)	Experiment conditions
0.5	63	4	100 mL 1.0 mol/L NaNO2 solution+100 mL 1.0 mol/L NH4Cl solution
1.0	79	19	100 mL 2.0 mol/L NaNO2 solution+100 mL 2.0 mol/L NH4Cl solution
1.5	127	67	100 mL 3.0 mol/L NaNO2 solution+100 mL 3.0 mol/L NH4Cl solution
2.0	142	82	100 mL 4.0 mol/L NaNO2 solution+100 mL 4.0 mol/L NH4Cl solution
2.5	157	97	100 mL 5.0 mol/L NaNO2 solution+100 mL 5.0 mol/L NH4Cl solution
3.0	178	118	100 mL 6.0 mol/L NaNO2 solution+100 mL 6.0 mol/L NH4Cl solution

Note: catalyst concentration: 0.3%; base brine: 60°C.