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Addressing Integrity Issues in Downhole Equipment by Corrosion Inhibition in Sweet Geothermal Brines

Geothermal resources have been successfully used in the Netherlands for heating districts in agriculture. Due to the high chloride content and the presence of carbon dioxide in some of the geothermal fluids in combination with the intrinsic elevated temperatures these production environments represent a considerable challenge for the integrity of the technical equipment in the geothermal plant. Localized corrosion damage in downhole equipment reported by several operators confirmed the need for a corrosion strategy to mitigate the impact of the aggressiveness of the geothermal fluid under the current operational conditions. To address this a corrosion inhibitor was characterized in the laboratory using a rotating cage to simulate high temperature and high shear stress conditions. Based on the positive outcome of these tests the corrosion inhibitor was successfully implemented in the field. This paper documents the corrosion damage observed in downhole equipment before the use of corrosion inhibition the obtained laboratory test results as well as the experiences from monitoring the field performance of the corrosion inhibitor in this geothermal demanding application.

Product Number: 51319-13364-SG
Author: Helmuth Sarmiento Klapper
Publication Date: 2019
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