Corrosion-inhibiting agents for reducing dissolved oxygen concentrations within upstream oilfield systems

A method for inhibiting corrosion of metal infrastructure within a wellbore, the method comprising:

• measuring an initial dissolved oxygen concentration of a fluid within the wellbore, wherein the initial dissolved oxygen concentration is in a range from 100 parts-per-billion (ppb) to 10 parts-per-million (ppm);
• providing a corrosion-inhibiting agent, wherein the corrosion-inhibiting agent is an organic oxygen scavenger configured to chemically react with and neutralize dissolved oxygen in the fluid;
• dissolving the corrosion-inhibiting agent in a solvent to form a corrosion-inhibiting solution compatible with a neutral to slightly acidic wellbore environment;
• and
• injecting the corrosion-inhibiting solution into the wellbore,
• wherein, within 90 minutes after injection of the corrosion-inhibiting solution, the corrosion-inhibiting solution reduces the dissolved oxygen concentration of the fluid within the wellbore from the initial dissolved oxygen concentration to below between 0.1 ppb to 50 ppb;
• and
• wherein, as a result of reducing the dissolved oxygen concentration of the fluid, the metal infrastructure exhibits a corrosion rate of equal to or less than 0.02 lb/ft2 in the neutral to slightly acidic wellbore environment.