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On-Site Corrosion Inhibitor Detection For Improved Corrosion Management

Picture for On-Site Corrosion Inhibitor Detection For Improved Corrosion Management
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Product Number: 51321-16792-SG
Author: Andy Osnowski; Scott Rankin; Harry Grover; Jenni Howe; Fiona Carson
Publication Date: 2021
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$20.00
$20.00

Corrosion inhibitors are widely used across the oil and gas industry to protect valuable infrastructure and manage corrosion issues. It is critical these chemicals are applied at a suitable dose: too much chemical can cause emulsion problems and increase OPEX, while too little chemical can leave a system at risk. The detection of corrosion inhibitor micelles can be used to identify the optimum dose. Micelles are nanoscale aggregates and identifying them in complex oilfield fluids, which often consist of multiple phases, is extremely challenging. The first-generation micelle detection technology we developed used complex instrumentation which required highly trained personnel and a lab environment to conduct testing. The technology has since undergone significant development and now consists of a small, rugged instrument, easy-to-use method and the ability to be deployed on-site (i.e. beside a sample point on a pipe). Advances have also been made in data processing and software has been built which gives immediate results. This sophisticated technology package has allowed us to
deploy a new corrosion management strategy in areas of the US onshore pipeline network, whereby an initial audit of a system is conducted to identify any sites of overdosing or underdosing. The corrosion inhibitor injection rates are adjusted accordingly, until dosing is detected to be optimal, and then regular (usually monthly or quarterly) monitoring is implemented. The concentration of chemical required to protect a system can change for a wide variety of reasons, such as increased solids production or change in fluid composition, therefore regular monitoring is essential. Data will be presented on the use of this method in the field.

Corrosion inhibitors are widely used across the oil and gas industry to protect valuable infrastructure and manage corrosion issues. It is critical these chemicals are applied at a suitable dose: too much chemical can cause emulsion problems and increase OPEX, while too little chemical can leave a system at risk. The detection of corrosion inhibitor micelles can be used to identify the optimum dose. Micelles are nanoscale aggregates and identifying them in complex oilfield fluids, which often consist of multiple phases, is extremely challenging. The first-generation micelle detection technology we developed used complex instrumentation which required highly trained personnel and a lab environment to conduct testing. The technology has since undergone significant development and now consists of a small, rugged instrument, easy-to-use method and the ability to be deployed on-site (i.e. beside a sample point on a pipe). Advances have also been made in data processing and software has been built which gives immediate results. This sophisticated technology package has allowed us to
deploy a new corrosion management strategy in areas of the US onshore pipeline network, whereby an initial audit of a system is conducted to identify any sites of overdosing or underdosing. The corrosion inhibitor injection rates are adjusted accordingly, until dosing is detected to be optimal, and then regular (usually monthly or quarterly) monitoring is implemented. The concentration of chemical required to protect a system can change for a wide variety of reasons, such as increased solids production or change in fluid composition, therefore regular monitoring is essential. Data will be presented on the use of this method in the field.

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