CORROSION IN OIL FIELD WATER

COURSE OUTLINE

Hydrocarbon-Bearing Fluid Characteristics

• Common dissolved constituents and undesirable components in hydrocarbon fluid.
• Amount of dissolved solids in the water.

The Nature of Formation Water and Problem-causing Factors

• General characteristics of formation and produced water.
• Corrosive properties and the role of sour / acidic components.
• Scaling properties and the mineral saturation.
• Corrosion, pitting and stress corrosion problems and scale in tubing material.

Corrosion Problem in Oilfield Production and Produced Water Handing

• Corrosion caused by pressure and temperature changes.
• Changes of corrosion properties of water at the surface facilities.
• Incompatible water mixing at the surface.
• Examples of produced water analyses.
• Ionic balance and the corrosion tendency.
• Common types of corrosion and its mechanism.
• Most common inorganic / mineral scales and its primary variables.
• Corrosion prevention / mitigation principles.
• H2S, CO2, and acidic impurities effects on surface facility corrosion.
• H2S pitting corrosion and stress corrosion cracking.
• CO2 exfoliation corrosion and calcium carbonate scaling.
• Microbial induced corrosion and solids built-up fouling problems.
• SRB corrosion and the under-deposits pitting.
• Oxygen corrosion and insoluble corrosion products fouling problems.

Examples and Case Studies

• Oilfield corrosion failures, pipeline/equipment leakages and ruptures.
• Oilfield pipeline / equipment plugging.
• Bottom-hole tubing material corrosion and stress corrosion cracking failures.

Oilfield Water Corrosion Prevention Methods

• High-Chromium stainless steels for tubing materials.
• Corrosion inhibitors and biocides for reservoir injection and surface injection treatment programs.
• Debris/fouling/water/condensate removal by mechanical means.
• H2S/CO2/O2 gas removal by mechanical and/or chemical means.
• Typical equipment for gas removal and water conditioning.
• Typical chemicals and application method of corrosion inhibitors.
• Typical chemicals and application method of biocides.
• Typical chemicals and application method of oxygen scavengers.
• Surface facility’s process/operations variables modification.
• Routine pipeline cleaning and pigging.
• Produced water treatment at the surface facility.
• On-line corrosion monitoring.

Safety in oilfield water handling

INSTRUKTUR

M. Sri Prasetyo Budi, ST., MT & Team / Dr. Ir. Ramli Sitanggang, B.Eng., M.Eng & Team