Abstract
The proper application of corrosion inhibitors within oil and gas producing wells is critical so that a timely delivery of chemical occurs throughout the system. In conventional batch treatment, the performance of the chemical and the retreatment interval depend almost entirely upon the film persistency of the product. In continuous treatment, the chemical performance depends on the concentration of inhibitor in the brine phase. By using the new slow release (mass-transfer controlled) encapsulated corrosion inhibitor described in this paper the chemical performance is based both upon the inhibitor concentration in the system and its film persistency. The novel slow-release treatment of encapsulated corrosion inhibitors approximates continuous inhibitor application while providing the film persistency characteristics best attained using a batch chemical application. This results in a chemical treatment that provides highly effective corrosion treatment in wells, especially those that present treatment challenges due to climatic conditions or for those located in remote areas.
