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Top of Line Corrosion Probabilistic Risk Analysis for Wet Sour Subsea Pipeline

Picture for Top of Line Corrosion Probabilistic Risk Analysis for Wet Sour Subsea Pipeline
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Top of Line Corrosion (TLC) occurs in a multiphase flow when water vapor condenses at the top and the sides of the pipeline leading to a severe corrosion attack. This study investigated the probabilistic risk of TLC for wet sour gas subsea pipeline using flow modeling and corrosion predications. The flow assurance hydraulic study showed that most of water drops out over the first few kilometers as the gas is cooled and becomes much less through the rest of the offshore part until they reach onshore area where the gas temperature drops further due to Joule-Thomson effect. It was anticipated that corrosion activities will be higher at the high condensation locations. The corrosion prediction modeling revealed high corrosion severity driven by Top of Line Corrosion (TLC). In order to maintain the system integrity the internal coating supplemented by V-jet batch inhibitor injection has been selected to protect against TLC. This study has realized the challenge to apply the batch treatment as it requires process interruption to meet scraper speed limitations. Therefore the industry path forward should consider the development of novel TLC treatments that to be applied with no impact on operations.

Product Number: 51319-13116-SG
Author: Faisal Al-Abbas
Publication Date: 2019
$0.00
$20.00
$20.00
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51314-3807-Top of the Line Corrosion Behavior in Highly Sour Environment; Effect of Gas Temperature

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51318-11223-Evaluation of Top-of-Line Corrosion Model for Multiphase Oil and Gas Environments

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The model was evaluated and effects of various parameters on corrosion rates are described. Corrosion rates obtained from the model are compared with actual field and lab testing data as a basis to quantify accuracy and efficacy.
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