Corrosion inhibitor composition for anticorrosion of high temperature oxygen-containing air foam flooding injection system
A technology of oxygen-containing air and injection system, applied in the field of oilfield chemistry
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Embodiment 1
[0032] Example 1 Configuration of corrosion inhibitor composition for anticorrosion of high temperature oxygen-containing air foam flooding injection system
[0033] Weigh NiSO 4 8g, 3.5g sodium ethylenediamine tetramethylene phosphonate, 1g lactic acid, 0.6g citric acid, P-20.1g, dissolved in 986.8g water, kept stirring at 50℃ for 10min, and finally adjusted the pH value to 5.0 with NaOH solution ~5.5.
[0034] The P-2 is coconut amine polyoxyethylene ether phosphate sodium salt, the structure is shown in formula 1, and the synthesis method is:
[0035] a. First, add cocoamine polyoxyethylene ether to a three-necked round-bottomed flask, add polyphosphoric acid to the beaker and dissolve it with ethanol; slowly drop the polyphosphoric acid ethanol solution into the alkylamine polyoxyethylene ether under reflux and stirring Then, the temperature was raised to 70°C and the reaction continued for 3 hours;
[0036] b. Then, add 5% distilled water and hydrolyze for 12h;
[0037] c. Finall...
Embodiment 2
[0040] Example 2 Configuration of corrosion inhibitor composition for anticorrosion of high temperature oxygen-containing air foam flooding injection system
[0041] Weigh NiSO 4 9g, 3.2g sodium ethylenediamine tetramethylene phosphonate, 1.8g lactic acid, 0.8g citric acid, 0.18g P-2, dissolved in 985g water, kept stirring at 50℃ for 10min, and finally adjusted the pH value to with NaOH solution 5.0~5.5.
[0042] The P-2 is soybean oil amine polyoxyethylene ether phosphate sodium salt, the structure is shown in formula 2, and the synthesis method is:
[0043] a. First, add soybean oil amine polyoxyethylene ether into a three-necked round-bottom flask, add polyphosphoric acid to the beaker and dissolve it with ethanol; slowly drop the polyphosphoric acid ethanol solution into the alkylamine polyoxyethylene ether under reflux and stirring Then, the temperature was raised to 70°C and the reaction continued for 3 hours;
[0044] b. Then, add 5% distilled water and hydrolyze for 12h;
[00...
Embodiment 3
[0048] Example 3 Configuration of corrosion inhibitor composition for anticorrosion of high temperature oxygen-containing air foam flooding injection system
[0049] Weigh NiSO 4 10g, ethylenediamine tetramethylene phosphonate sodium 3g, lactic acid 1.5g, citric acid 1g, P-2 0.15g, dissolved in 984.35g water, kept stirring at 50℃ for 10min, finally adjusted the pH value to 5.0 with NaOH solution ~5.5.
[0050] The P-2 is tallow amine polyoxyethylene ether phosphate sodium salt, the structure is shown in formula 3, and the synthesis method is:
[0051] a. First, add tallow amine polyoxyethylene ether to a three-necked round-bottom flask, add polyphosphoric acid to the beaker and dissolve it with ethanol; slowly drop the polyphosphoric acid ethanol solution into the alkylamine polyoxyethylene ether under reflux and stirring , Then the temperature was raised to 70°C, and the reaction continued for 3 hours;
[0052] b. Then, add 5% distilled water and hydrolyze for 12h;
[0053] c. Finall...
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