Our Project Support

Decommissioning Line Flush & Chemical Optimisation

Project Overview

As part of the NJV Project decommissioning phase, Omega Analytic was engaged to provide specialist analytical and field support during line flushing operations and preservative chemical injection. The scope focused on ensuring effective cleaning of process lines while maintaining optimal chemical dosing to protect assets during shutdown and preservation.

The project required real-time decision-making, rapid laboratory turnaround, and close coordination between field technicians and operations personnel.

Scope of Work

Omega Analytic Specialists delivered the following key services:

• Decommissioning Line Flush Monitoring

  • On-site sampling during active flushing operations

  • Monitoring of water quality parameters (Oil in Water concentration)

  • Verification of cleanliness criteria prior to preservation

• Chemical Monitoring & Optimisation

  • Assessment of preservative chemical concentration during injection

  • Adjustment recommendations to ensure target residual levels were achieved

  • Compatibility checks with remaining process fluids

• High-Frequency Sampling

  • Multiple samples collected within short time intervals (hourly and sub-hourly during peak flushing)

  • Rapid field testing combined with laboratory confirmation

  • Continuous data reporting to operations for real-time adjustments

Challenges

The Project presented several operational complexities:

• Short Operational Window: Flushing and preservation activities were conducted over compressed timeframes, requiring immediate analytical feedback.

• Variable Line Conditions: Injection pump down-time led to fluctuating water quality parameters during early flush stages.

• Chemical Stability Control: Preservative chemicals required precise dosing to maintain effective inhibition without overdosing.

• Dynamic Process Conditions: Flow rates and injection volumes changed throughout the operation, impacting concentration stability.

Omega Analytic’s Approach

To address these challenges, Omega Analytic implemented:

1. Field-Based Analytical Support – Technicians stationed on-site to perform rapid testing with 24 hours coverage and minimise turnaround time.

2. Structured Sampling Regime – Pre-determined sampling intervals intensified during critical flush phases.

3. Real-Time Communication – Immediate reporting of results to commissioning and chemical injection teams.

4. Data Trending & Optimisation – Continuous tracking of Oil in Water and preservative concentration trends over the period of flushing to monitor and refine injection rates.

This integrated approach ensured chemical concentrations remained within specification while confirming flushing effectiveness before progressing to preservation.

Outcomes

• Successful completion of top-side decommissioning line flush within the planned schedule

• Achievement of target cleanliness criteria prior to preservation

• Optimised preservative chemical dosing, reducing chemical waste and mitigating corrosion risk

• No environmental non-conformances

• Safe execution with zero incidents

Value Delivered

Omega Analytic’s proactive monitoring and optimisation strategy enabled the NV Project team to make informed, real-time operational decisions. The combination of rapid sampling, chemical expertise, and field presence ensured asset integrity was maintained throughout decommissioning and preservation.

The project reinforced Omega Analytic’s capability in supporting complex decommissioning activities through responsive analytical services and chemical process optimisation.

Client Asset: Decommissioned FPSO
Service Provider: Omega Analytic

Omega Analytic was engaged to conduct comprehensive gas free testing and certification services following the decommissioning and cleaning of an FPSO. The scope of work involved verifying that all cargo tanks, slop tanks, ballast tanks, and associated confined spaces were safely cleaned, ventilated, and rendered gas free prior to maintenance, inspection, and hot work activities.

Scope of Work

• Verification that all tanks had been thoroughly cleaned and ventilated

• Atmospheric testing of every tank and designated confined space

• Measurement of:

  • Oxygen concentration

  • Lower Explosive Limit (LEL)

  • Hydrogen Sulphide (H₂S)

  • Carbon Monoxide (CO)

  • Volatile hydrocarbons (as required)

• Use of certified and calibrated multi-gas detectors

• Cross-verification readings at multiple levels within tanks (top, middle, bottom)

• Witnessing of final ventilation and isolation status

• Issuance of formal Gas Free Certificates

Methodology

Testing was conducted using calibrated gas detection instruments with valid certification records to ensure accuracy and compliance with marine and offshore safety standards. Atmospheric readings were taken at multiple points within each tank to confirm uniform gas free conditions and eliminate the risk of stratified hazardous atmospheres.

All results were documented in accordance with regulatory and client requirements. Testing was witnessed where required by vessel representatives and project engineers.

Outcomes

• All designated tanks and confined spaces confirmed gas free

• Oxygen levels verified within safe working limits

• Flammable vapours confirmed at 0% LEL prior to certification

• No residual toxic gas concentrations detected above permissible exposure limits

• Formal Gas Free Certificates issued for each approved space

Value Delivered

Omega Analytic provided independent verification that the FPSO was safe for entry and subsequent maintenance or dismantling works. Through certified equipment, systematic testing procedures, and professional witnessing, the project achieved full compliance with offshore safety requirements while ensuring personnel safety remained the highest priority.

This project demonstrates Omega Analytic’s capability in supporting complex offshore decommissioning activities with reliable gas testing and certification services.

Omega Analytic was engaged to provide analytical and field support services during the flushing, pigging, cleaning, and long-term preservation of over 100 kilometres of pipeline infrastructure. The scope involved preserving pipeline integrity following suspension of operations and implementing a chemical preservation program designed to protect the asset for lay-up period prior to future reactivation.

This large-scale project required continuous monitoring, laboratory coordination, and strict quality control to ensure the pipeline met cleanliness and preservation specifications.

Scope of Work

1. Pipeline Flushing & Pigging Support

• Monitoring of progressive flushing stages across multiple pipeline sections

• Sampling during pigging operations to assess removal efficiency

• Verification of cleanliness criteria prior to preservation

2. Oil in Water Concentration Testing

• Field sampling to determine residual oil-in-water concentrations

• Laboratory analysis to confirm compliance with cleanliness thresholds

• Trending of hydrocarbon reduction throughout flushing stages

3. Sampling & Chain of Custody Management

• Structured fluid sampling regime for onshore laboratory testing

• Proper labelling, documentation, and secure handling of all samples

• Full chain of custody compliance for safe transportation and traceable analysis

• Coordinated reporting to client and engineering teams

Challenges

• Extensive pipeline length exceeding 100 km requiring coordinated sectional monitoring

• Variable monitoring of oil concentration levels across different segments

• Tight operational schedule requiring rapid turnaround of analytical results

• Ensuring sample integrity during transport from offshore/remote locations to onshore laboratories

Omega Analytic’s Approach

Omega Analytic deployed experienced field personnel to provide continuous analytical oversight during flushing and pigging operations. Real-time testing enabled the operations team to optimise flushing efficiency, reduce chemical consumption, and confirm readiness for preservation.

Through structured sampling procedures and strict chain of custody protocols, all laboratory results were traceable, auditable, and compliant with client and regulatory standards.

Outcomes

• Successful flushing and cleaning of over 100 km of pipeline

• Verified reduction of oil in water concentration to within specification

• Full chain of custody compliance with zero sample discrepancies

• Safe execution with no environmental or safety incidents

Value Delivered

Omega Analytic provided end-to-end analytical assurance for a complex pipeline cleaning and preservation program. Through precise testing, data-driven optimisation, and strict quality control processes, the client achieved confidence that the pipeline asset is preserved, protected, and ready for future recommissioning when required.

Project Overview

Omega Analytic was contracted to provide a senior chemist to support the scoping, commissioning, and operational optimisation of laboratory facilities onboard a newly build LNG FPSO. The engagement required a highly experienced professional capable of establishing laboratory systems from the ground up while ensuring compliance with offshore safety, quality, and environmental standards.

The scope extended beyond routine laboratory work and included technical advisory, procedural development, equipment validation, troubleshooting, and senior engineers engagement at senior operational and management levels.

Scope of Work

1. Laboratory Scoping & Setup

• Assessment of laboratory layout, workflow, and analytical requirements aligned with production chemistry needs.

• Selection and verification of analytical equipment for Gas, Condensate, produced water, and process chemical monitoring.

• Development of laboratory commissioning plans and performance verification protocols.

2. Commissioning & Validation

• Installation oversight and commissioning of laboratory analysers and instrumentation.

• Calibration, performance testing, and QC verification to ensure compliance with operational specifications.

• Establishment of quality control frameworks, including control charts, reference standards, and validation documentation.

3. Procedure Development

• Authoring of detailed Standard Operating Procedures (SOPs) for all laboratory tests and instrumentation.

• Development of safety procedures aligned with offshore HSE requirements.

• Implementation of documentation systems to ensure traceability and audit readiness.

4. Troubleshooting & Optimisation

• Diagnosis and resolution of analyser performance issues under live production conditions.

• Root cause analysis for inconsistent or anomalous laboratory results.

• Optimisation of test methods to improve accuracy, efficiency, and repeatability.

5. Staff Training & Capability Development

• Delivery of hands-on technical training for offshore laboratory technicians.

• Mentoring in quality assurance practices and troubleshooting methodologies.

• Development of competency frameworks to ensure sustainable laboratory performance.

6. Client Communication & Reporting

• Direct engagement with senior client representatives and offshore leadership.

• Clear communication of technical findings, risks, and mitigation strategies.

• Reporting on laboratory performance, compliance status, and continuous improvement initiatives.

Challenges

Operating within the constraints of an offshore FPSO environment presented unique technical and logistical challenges:

• Limited space and environmental constraints impacting equipment layout and stability.

• Time-sensitive commissioning schedules aligned with production targets.

• Requirement for zero compromise on safety and environmental compliance.

• Live production conditions requiring rapid and accurate troubleshooting.

Outcomes & Ongoing Impact

• Successful commissioning and validation of laboratory systems supporting production chemistry monitoring.

• Establishment of a robust QC framework ensuring reliable analytical data.

• Improved analyser reliability through systematic troubleshooting and optimisation.

• Enhanced competency of onboard laboratory personnel through structured training.

• Strengthened communication between laboratory, production, and management teams.

The project remains ongoing, with Omega Analytic continuing to provide technical oversight, optimisation support, and high-level advisory services to ensure safe, compliant, and efficient laboratory operations aboard the Facility.

Value Delivered

Through this engagement, Omega Analytic demonstrates its capability to deploy senior chemists who combine technical expertise, procedural rigour, and strong stakeholder communication — ensuring laboratory systems operate safely, reliably, and in alignment with offshore production objectives.

Project Overview

Omega Analytic was engaged to attend the WA-DC Gas Plant on short notice to conduct a full chemical stocktake and inventory assessment of redundant chemicals and laboratory reagents that had been stored on-site for an extended period. Many of these products were aged, unused, and no longer required for operational activities, creating a potential safety and compliance risk for the facility.

The scope of work required a complete review of all chemical storage areas, identification of chemical types and quantities, and preparation of materials for safe disposal in accordance with site requirements and Australian Dangerous Goods (DG) regulations.

Scope of Work

Omega Analytic deployed an experienced professional chemist to site to complete the following key tasks:

• Conduct a full stocktake of all stored chemicals and reagents

• Identify and record chemical names, quantities, container conditions, and storage compatibility

• Classify and segregate chemicals based on hazard rating and DG classification

• Assess aged and redundant products for disposal suitability

• Safely package, label, and prepare DG-rated chemicals for transport and certified disposal

• Consolidate and organise chemicals to streamline handover to an approved disposal contractor

• Ensure all handling and packing activities were completed safely, efficiently, and in compliance with site and regulatory requirements

Key Challenges

The chemicals had been stored for a long period, with varying container conditions and mixed storage environments. The project required careful handling, hazard awareness, and strict segregation of incompatible substances to eliminate risk during packing and transfer.

A key priority was ensuring the plant remained compliant and that all chemicals were made ready for disposal without disruption to operations.

Outcome & Results

The project was completed successfully with zero safety incidents and minimal operational impact. Omega Analytic delivered a complete and accurate chemical inventory and ensured all redundant and hazardous chemicals were safely prepared for disposal and handover to a certified waste contractor.

This work significantly improved site compliance, reduced chemical storage risk, and supported the client in maintaining safe and environmentally responsible chemical management practices.

Value Delivered

• Full chemical stocktake and traceable inventory records

• Safe segregation and DG packaging in accordance with regulatory requirements

• Improved compliance and reduced site chemical risk

• Rapid mobilisation and professional delivery under short notice

• Efficient execution resulting in a satisfied client and successful project close-out

Project Result: Successfully completed chemical audit and disposal preparation, delivered safely and efficiently, ensuring client compliance and improved chemical storage management.Item description