Asset Integrity Management
In harsh oilfield environments, maintaining the long-term reliability of pipelines, production systems, and processing equipment is critical. Coastal Chemical supports asset integrity through corrosion prevention programs designed to protect metal surfaces from internal corrosion caused by water, acid gases, and other aggressive fluids.
Coastal Chemical offers solutions to help extend equipment life, reduce failures, and lower maintenance costs.
Hydrogen Sulfide Scavengers
Corrosion Prevention
Biocides for MIC Prevention
Iron Sulfide Dissolvers
Coastal Chemical’s H2S scavenging program follows a 4-stage process:
1. System Evaluation
Results of this evaluation allows for identification of the most efficient product at the most effective location, as far upstream as possible.
2. Product Selections
Product Selection takes into account the data that was gathered from the system evaluation to ensure the correct product is chosen for the correct application.
3. Dosage Rate or Usage Calculations
Dosage Rate or Usage Calculations are figured using the stoichiometry of the chemistry being utilized, along with field established usage factors.
4. Efficiency Monitoring
Efficiency Monitoring is conducted on each injection location, at a specific time interval, to ensure the effectiveness and efficiency of the H2S treatment program.
Corrosion Prevention
Corrosion inhibitors are chemical additives used in oil and gas production to protect metal surfaces from degrading due to exposure to water, oxygen, acid gases like CO₂ and H₂S, and other corrosive elements. They form a protective barrier either by a physical coating, neutralized corrosive agents, or changing the electrochemical environment to slow down corrosion.
Corrosion Inhibitor Product Selection
Corrosion inhibitor product selection should always begin in the field. First, one must evaluate the product’s compatibility with the produced water. Many corrosion inhibitors have surfactants and demulsifier bases built into them. For this reason, an emulsification tendency test must also be performed on-site with various products. Further laboratory analyses can be performed to pinpoint which inhibitor will be the most effective.
Modern Test Methods
Most NACE-recommended corrosion inhibitor tests use synthetic brines rather than field water, with older methods like corrosion wheel and LPR CO₂ purge still in use. Newer techniques—such as jet impingement and rotating cage tests—simulate real-world conditions by factoring in shear stress, pH, CO₂ pressure, and oil/water ratios, measuring inhibitor performance based on metal loss rates and percent protection.
Field Monitoring
As a well or field matures, system corrosiveness can change over time, making ongoing field monitoring essential for long-term corrosion control. Tools like regularly replaced corrosion coupons, iron and manganese analysis, and residual inhibitor measurements help ensure treatment programs remain effective and responsive to evolving conditions.
MODERN TEST METHODS
Most NACE-recommended corrosion inhibitor tests use synthetic brines rather than field water, with older methods like corrosion wheel and LPR CO₂ purge still in use. Newer techniques—such as jet impingement and rotating cage tests—simulate real-world conditions by factoring in shear stress, pH, CO₂ pressure, and oil/water ratios, measuring inhibitor performance based on metal loss rates and percent protection.
FIELD MONITORING
As a well or field matures, system corrosiveness can change over time, making ongoing field monitoring essential for long-term corrosion control. Tools like regularly replaced corrosion coupons, iron and manganese analysis, and residual inhibitor measurements help ensure treatment programs remain effective and responsive to evolving conditions.
Biocides for MIC Prevention
Microbially Induced Corrosion (MIC) is a form of corrosion caused or accelerated by the presence and activity of microorganisms—particularly bacteria—in oil and gas systems. These microbes thrive in water-rich environments and produce corrosive byproducts like hydrogen sulfide, organic acids, or biofilms. These substances can degrade metal surfaces, leading to pitting, localized corrosion, and even structural failure in pipelines, tanks, and other production equipment.
The impact of uncontrolled MIC can be severe – increased maintenance costs, unplanned shutdowns, and safety risks.
Targeted biocide treatments and active inspection are required to manage the threat of MIC effectively. Chemical biocides from Coastal Chemical effectively eradicate the microorganisms at the root of MIC.
Iron Sulfide Dissolvers
Iron sulfide poses a significant threat to asset integrity and safety due to its corrosive and reactive nature. It forms when Hydrogen Sulfide reacts with iron from steel structures, like pipelines, creating deposits of pyrite or mackinawite. It is also associated with higher risk of corrosion.
If not properly managed, iron sulfide can pose a risk to operations, eventually leading to high maintenance costs, equipment replacements, or shutdowns.
Iron sulfide dissolvers break down deposits by reacting with the iron and sulfur components, converting them to soluble compounds or less harmful byproducts that can be flushed out of the system.
Coastal Chemical iron sulfide dissolvers protect the reliability and safety of your system.
Contact Coastal Chemical to learn how we
can assist in asset integrity management.
800.535.6182
Coastal Chemical