Corrosion inhibitor for sour oil and gas fields
A corrosion inhibitor, oil and gas field technology, applied in the field of metal anti-corrosion, can solve the problems of corrosion inhibitor environmental protection, poor stability and adaptability, etc., achieve excellent slow-release effect, prevent oxidation, and reduce environmental pollution
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Embodiment 1
[0039] For pipeline natural gas total pressure P=12MPa, P H2S =0.72MPa, P CO2 =0.93MPa, gas transmission capacity=300,000 cubic meters / day, condensate oil production=5.3t / day, water production=1.0t / day sour oil and gas field pipeline
[0040] Corrosion inhibitor formula:
[0041] Cyclohexamide Salicylate 20%
[0042] Pyridinium quaternary ammonium salt 10%
[0043] Sodium dodecylbenzenesulfonate 0.2%
[0044] Antioxidant BHT 0.2%
[0045] Descaler PAC 0.1%
[0046] Silicone oil defoamer 0.5%
[0047] Naphthenate 0.4%
[0048] Composite solvent 68.6%
[0049] Wherein the composite solvent is composed of the following components in mass percentage:
[0050] Ethanol 30%
[0051] Ethylene glycol 20%
[0052] water 50%
[0053] In accordance with the provisions of ASTM G170-06 "Standard Guide for Laboratory Evaluation and Verification of Corrosion Inhibitors in Oilfields and Refineries", the dynamic weight loss coupon test was carried out under simulated working conditi...
Embodiment 2
[0057] For pipeline natural gas total pressure P=14.5MPa, P H2S =0.55MPa, P CO2 =0.64MPa, gas transmission capacity=280,000 cubic meters / day, condensate oil production=0.3t / day, water production=2.1t / day sour oil and gas field pipeline
[0058] Corrosion inhibitor formula:
[0059] Cyclohexamide Salicylate 10%
[0060] Pyridinium quaternary ammonium salt 5%
[0061] Sodium dodecylbenzenesulfonate 0.1%
[0062] Antioxidant BHT 0.1%
[0063] Descaler PAC 0.2%
[0064] Silicone oil defoamer 0.3%
[0065] Naphthenate 0.3%
[0066] Composite solvent 84%
[0067] Wherein the composite solvent is composed of the following components in mass percentage:
[0068] Ethanol 50%
[0069] Ethylene glycol 30%
[0070] water 20%
[0071] In accordance with the provisions of ASTM G170-06 "Standard Guide for Laboratory Evaluation and Verification of Corrosion Inhibitors in Oilfields and Refineries", the dynamic weight loss coupon test was carried out under simulated working conditio...
Embodiment 3
[0075] It is used in sour oil and gas fields where the total pressure of pipeline natural gas is P=14.5MPa, PH2S=0.55MPa, PCO2=0.64MPa, gas transmission volume is 280,000 standard cubic meters per day, condensate oil production is 0.3t / day, and water production is 2.1t / day in the pipeline,
[0076] Corrosion inhibitor formula:
[0077] Cyclohexamide Salicylate 15%
[0078] Pyridinium quaternary ammonium salt 9%
[0079] Sodium dodecylbenzenesulfonate 0.1%
[0080] Antioxidant BHT 0.1%
[0081] Descaler PAC 0.1%
[0082] Silicone oil defoamer 0.3%
[0083] Naphthenate 0.4%
[0084] Composite solvent 75%
[0085] Wherein the composite solvent is composed of the following components in mass percentage:
[0086] Ethanol 40%
[0087] Ethylene glycol 20%
[0088] water 40%
[0089] In accordance with the provisions of ASTM G170-06 "Standard Guide for Laboratory Evaluation and Verification of Corrosion Inhibitors in Oilfields and Refineries", the dynamic weight loss coupon...
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