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Contamination control in oil and gas processes involves managing solid, liquid and salt-like contaminants present in gas streams, process fluids and system fluids. These contaminants can affect equipment performance, increase maintenance requirements and reduce production throughput. Filtration and separation technologies are used to remove contaminants and support consistent operation across processing units and systems. Explore how these technologies are applied across oil and gas filtration applications.
Why is fluid cleanliness important in oil and gas operations?
Contaminants in well-injection fluids, crude oil, gas, NGL, amine, glycol, water, hydraulic oil and lubrication oil can affect equipment and process performance.
When not managed, contamination may contribute to:
- Increased operating and maintenance costs
- Reduced production throughput
- Equipment failure and unplanned shutdowns
These challenges directly affect process performance across oil and gas operations.
How can contamination control support process performance?
Reduce operating issues
- Foaming in contactor towers
- Premature fouling of adsorbents and catalysts
- Off specification products
Support cost control
- Reduced energy impact linked to fouling of heat exchangers, reboilers, columns and cold boxes
- Reduced frequency of adsorbent and catalyst replacement
- Reduced solvent make ups and chemical usage
Minimise maintenance intervention
- Reduced cleaning requirements for process equipment
- Lower risk of component replacement for compressors and turbines
- Reduced corrosion impact on pipelines and equipment
Support operational continuity
- Reduced risk of shutdown caused by compressor or turbine fouling
Align with environmental requirements
- Support compliance with health, safety and environmental specifications
These impacts occur across multiple stages of oil and gas processing.
New low NOx burner tip compared with damaged burner tip due to contaminants
Where are filtration solutions applied in oil and gas processes?
These filtration and separation technologies are applied across production, gas processing and LNG operations at specific points in the process.
Oil and gas production process showing key locations where filtration and separation technologies are applied
- Glycol contactor protection: Prevent hydrocarbon aerosols and solids from contaminating glycol systems using liquid gas coalescers
- Upstream activated carbon protection: Remove solid contaminants using high efficiency particle filters
- Downstream activated carbon protection: Remove carbon fines to prevent solvent contamination
- Compressor protection: Prevent fouling from liquid aerosols and solids using coalescers
- Lubrication and hydraulic oil systems: Remove solid particles and monitor cleanliness to support equipment protection
- Fuel gas treatment: Remove liquid aerosols and solids to support turbine operation
- Diesel purification: Remove free water and solids using liquid/liquid coalescers
Gas processing plants
Filtration and separation technologies are applied across key stages including condensate dewatering, crude oil desalting, produced water treatment and amine system protection.
Gas processing flow diagram showing key stages where filtration and separation technologies are applied
LNG plants
LNG processing plants also use filtration and separation technologies at key stages, including amine treatment, gas metering and cold box protection.
Note: Process layouts vary and not all steps apply to every installation.
What filtration and separation technologies are used?
To address these challenges, filtration and separation technologies are applied at key process points.
Pall designs and supplies filtration and separation technologies for gas and liquid applications across oil and gas production, processing and LNG operations.
- Particulate filters: Used to remove solid contaminants from liquids and gases. Available in depth and pleated configurations to support surface area and service life.
- Liquid gas coalescers: Remove entrained liquid aerosols from gas streams by coalescing small droplets into larger droplets for separation.
- Liquid liquid coalescers: Separate immiscible liquids and emulsions, including removal of free water from hydrocarbons.
- Tangential flow technology: Used in selected applications to support removal of contaminants from process and water streams.
- Oil purification systems: Vacuum dehydration and particulate filtration technologies used to remove water, gases and solids from hydraulic, lubrication and fuel systems.
How is contamination monitored in system fluids?
Condition monitoring supports detection of abnormal contamination levels in fluids used in industrial processes.
- Portable monitoring devices measure fluid cleanliness, including challenging fluids
- Sensors detect water presence in oils and report saturation or ppm levels
Monitoring supports maintenance planning and helps identify contamination sources.
What services support contamination control?
These monitoring and control practices can be supported through applied services.
- Process audits and consultancy: Assessment of operating systems to identify contamination issues and opportunities for improvement through data collection and technical review.
- Contamination mapping and piloting: Sampling and analysis across process points to identify contaminant type and origin using laboratory and pilot scale equipment.
- Filtration equipment rental: Temporary equipment provided for pilot testing, system cleaning or interim operation during equipment installation.
- Technical services support: Engineering and technical specialists support system optimisation, verification and maintenance activities.
How does Pall support oil and gas operations?
Pall provides filtration and separation technologies across oil and gas, refining, petrochemical and power generation markets.
- Broad portfolio of filters, coalescers and systems
- Capability to supply components or integrated systems
- Support for small scale to large scale installations
Pall also provides global technical support through scientific and laboratory services and regional engineering teams.
Supporting integrated fluid management
These applications and technologies are brought together through an integrated approach to fluid management.
Pall applies an integrated approach to fluid management across incoming process fluids, system fluids and waste streams. This approach supports consistent application of filtration and separation technologies across the plant.
Research, quality and global support
- Research and development supports application specific system design
- Laboratory services support analysis and solution development
- Global sales and service teams provide regional support
- Quality systems aligned to ISO9001:2015
Access the complete paper with detailed process diagrams, application examples and filtration approaches across oil and gas operations.