Constructability Review Services for Safer, More Efficient Oil and Gas Projects

TOMSEY Engineering & Services International Ltd successfully facilitated the Constructability Review Workshop for the Oben NAG Field Late-Life LP Compression Project, reinforcing our commitment to delivering practical engineering solutions that improve project execution, safety and operational efficiency across Nigeria’s energy sector.

The workshop was hosted by Seplat Energy Plc and brought together key project stakeholders, including NNPC E&P Limited and the Nigerian Midstream and Downstream Petroleum Regulatory Authority (NMDPRA). The collaborative session provided a structured platform for multidisciplinary technical experts to evaluate the project’s design from a construction perspective before the commencement of full-scale execution.

The Importance of Constructability Reviews

Constructability Reviews are an essential component of successful project delivery. They involve a systematic assessment of engineering designs during the planning phase to ensure that proposed facilities can be constructed safely, efficiently and cost-effectively.

By identifying potential construction challenges early, project teams can reduce delays, minimize rework, improve safety performance and optimize overall project execution.

As the independent facilitator, TOMSEY Engineering guided the technical review sessions, encouraging open collaboration among stakeholders while ensuring that all observations and recommendations were captured in a structured and objective manner.

Key Outcomes of the Workshop

Throughout the workshop, participants conducted a comprehensive review of the project’s design and construction methodology. The exercise enabled stakeholders to:

• Assess the design for construction feasibility and execution efficiency.
• Identify potential construction risks, constraints and opportunities for optimization.
• Recommend practical improvements that enhance safety, quality, project schedule and cost performance.
• Strengthen collaboration between engineering, operations, construction and regulatory stakeholders.
• Develop actionable recommendations that will support successful project implementation.

The multidisciplinary discussions generated valuable insights that will contribute to the safe, efficient and cost-effective delivery of the Oben NAG Field Late-Life LP Compression Project.

Supporting Engineering Excellence in Nigeria’s Energy Industry

At TOMSEY Engineering & Services International Ltd, we recognize that successful projects begin with sound engineering decisions made early in the project lifecycle.

Our Constructability Review services help clients identify potential issues before construction begins, enabling informed decision-making that reduces project risks while improving constructability and long-term operational performance.

We extend our sincere appreciation to Seplat Energy Plc, NNPC E&P Limited, NMDPRA, and every participant whose expertise and active engagement contributed to the success of this workshop. Their collaborative approach demonstrates a shared commitment to engineering excellence, safety and continuous improvement.

Our Technical Safety & Engineering Services

TOMSEY Engineering provides a comprehensive range of engineering and technical safety services for the oil and gas, energy, petrochemical and industrial sectors, including:

• Constructability Reviews
• HAZID (Hazard Identification)
• HAZOP (Hazard and Operability Studies)
• LOPA (Layer of Protection Analysis)
• SIL (Safety Integrity Level) Studies
• Bow Tie Analysis and Barrier Management
• Design and Operations Safety Cases
• Quantitative Risk Assessment (QRA)
• Fire Explosion Risk Assessment (FERA)
• Escape, Evacuation and Rescue Analysis (EERA)
• Consequence Modelling
• Construction Risk Assessments
• SIMOPS (Simultaneous Operations)
• Pre-Startup Safety Reviews (PSSR)

Partner with Us

As a trusted engineering and technical safety partner, TOMSEY Engineering & Services International Ltd continues to support the delivery of complex energy infrastructure projects through practical engineering expertise, independent technical facilitation and internationally aligned safety practices.

Whether your project is in the conceptual design, FEED, detailed engineering, construction, or operational phase, our team is equipped to help improve constructability, strengthen risk management, ensure regulatory compliance and enhance overall project performance.

Contact TOMSEY Engineering & Services International Ltd today to learn how our Engineering and Technical Safety solutions can help deliver safer, smarter, and more successful projects.

Strengthening Process Safety Through Structured Hazard Identification and Risk Assessment

TOMSEY Engineering & Services International Ltd is proud to announce the successful completion of the HAZID (Hazard Identification) and HAZOP (Hazard and Operability) Study Workshop for the Umuseti Produced Water Treatment Project.

The study was conducted to evaluate the design of the Produced Water Treatment Facility, with the primary objective of systematically identifying potential process hazards and operability challenges. Through this structured review, the project team sought to ensure that the proposed facility is safe, reliable, efficient, and fit for purpose throughout its operational lifecycle.

Why HAZID and HAZOP Studies Matter

As oil and gas facilities become increasingly complex, integrating process safety into the design phase is critical for reducing operational risks and ensuring long-term reliability.

HAZID and HAZOP studies provide a structured methodology for identifying hazards, evaluating potential process deviations, and developing practical recommendations before construction and commissioning begin. Conducting these reviews early in the project lifecycle enables organizations to improve design quality, enhance asset integrity, strengthen regulatory compliance and reduce the likelihood of costly modifications during later project stages.

A Collaborative Technical Review

The workshop brought together a multidisciplinary team of experienced professionals from PILLAR OIL LTD, J&G Engineering and Construction Services Limited and the Nigerian Upstream Petroleum Regulatory Commission (NUPRC).

Participants represented a broad range of technical disciplines, including:

• Process Safety
• Health, Safety and Environment (HSE)
• Operations
• Maintenance
• Instrumentation
• Piping Engineering
• Project Engineering

This collaborative approach ensured that the facility design was reviewed from multiple operational and engineering perspectives, resulting in a comprehensive assessment of potential risks and opportunities for improvement.

Key Outcomes of the Study

Using internationally recognized HAZOP methodologies, the workshop systematically examined process deviations, identified potential hazards and evaluated operability concerns associated with the proposed facility design.

The study enabled stakeholders to:

• Identify potential process hazards and operational risks.
• Evaluate process deviations and their possible causes and consequences.
• Improve design integrity and process reliability.
• Develop practical recommendations to strengthen process safety.
• Enhance operational performance and long-term asset reliability.
• Support compliance with industry standards and regulatory requirements.

The recommendations generated during the workshop will contribute significantly to the safe, efficient and sustainable operation of the Umuseti Produced Water Treatment Facility.

The success of every Process Safety study depends on open collaboration, technical expertise and active stakeholder engagement.

We sincerely appreciate PILLAR OIL LTD, J&G Engineering and Construction Services Limited, NUPRC, and every participant for their valuable technical contributions, constructive discussions and commitment throughout the workshop. Their professionalism and collaborative spirit played a vital role in the successful completion of this important safety review.

Our Process Safety & Technical Safety Expertise

At TOMSEY Engineering & Services International Ltd, we help clients identify and manage process risks throughout every stage of the project lifecycle; from concept development and FEED to detailed engineering, construction, commissioning and operations.

Our Process Safety and Technical Safety services include:

• HAZID (Hazard Identification)
• HAZOP (Hazard and Operability Studies)
• LOPA (Layer of Protection Analysis)
• SIL (Safety Integrity Level) Studies
• Bow-Tie Analysis and Barrier Management
• Design and Operations Safety Cases
• Quantitative Risk Assessment (QRA)
• Fire Explosion Risk Assessment (FERA)
• Escape, Evacuation and Rescue Analysis (EERA)
• Consequence Modelling
• Construction Risk Assessments
• SIMOPS (Simultaneous Operations)
• Pre-Startup Safety Reviews (PSSR)

Partner with US

At TOMSEY Engineering & Services International Ltd, we remain committed to delivering fit-for-purpose engineering and process safety solutions that improve operational excellence, strengthen regulatory compliance and protect people, assets, and the environment.

Whether you require HAZID, HAZOP, SIL, LOPA, Quantitative Risk Assessments, Constructability Reviews or broader Technical Safety services. Our experienced team works alongside project stakeholders to identify risks early, optimize designs and support the successful delivery of safe and efficient energy infrastructure projects across Nigeria.

Contact TOMSEY Engineering & Services International Ltd today to discover how our Engineering and Technical Safety expertise can support your next project with confidence.

Advancing Process Safety Through Comprehensive Risk Assessment and Technical Collaboration

TOMSEY Engineering & Services International Ltd is proud to announce the successful facilitation of the HAZID (Hazard Identification), HAZOP (Hazard and Operability) and SIL (Safety Integrity Level) studies for the OBEN NAG Late-Life LP Compression Project – Detailed Engineering Design (DED).

Hosted at Eko Hotel & Suites, Victoria Island, Lagos, the workshop brought together technical experts and key stakeholders from Seplat Energy Plc, NNPC E&P Limited (NEPL) and the Nigerian Midstream and Downstream Petroleum Regulatory Authority (NMDPRA). TOMSEY Engineering served as the independent facilitator, leading the technical review sessions and providing comprehensive documentation support throughout the study.

Supporting Safe and Reliable Project Development

As energy projects become increasingly complex, structured Process Safety studies play a critical role in ensuring facilities are designed to operate safely, efficiently and in compliance with industry standards.

The combined HAZID, HAZOP, and SIL studies enabled project stakeholders to systematically evaluate potential hazards, assess operational risks and determine the effectiveness of safety systems before project execution.

By conducting these assessments during the Detailed Engineering Design (DED) phase, the project team can proactively address potential issues, strengthen design integrity and improve long-term operational reliability.

Objectives of the Studies

The workshop provided a structured platform for multidisciplinary collaboration, enabling stakeholders to:

• Identify potential hazards across the low-pressure gas compression system.
• Evaluate process operability and existing safeguarding measures.
• Assess the Safety Integrity Levels (SIL) required for critical protection systems.
• Review process deviations and their potential causes and consequences.
• Develop practical recommendations to strengthen process safety and operational performance.

Through open technical discussions and systematic analysis, participants examined the facility design from multiple engineering and operational perspectives, ensuring that key risks were identified and appropriately addressed.

Key Outcomes

The collaborative review produced a comprehensive set of recommendations that will support the successful execution of the OBEN NAG Late-Life LP Compression Project.

The studies delivered several important outcomes, including:

• Improved understanding of process hazards and associated risks.
• Enhanced confidence in the effectiveness of safety and protection systems.
• Recommendations to improve operational reliability and maintainability.
• Strengthened regulatory compliance and adherence to industry best practices.
• A clear roadmap for implementing risk reduction measures during project execution.

These outcomes will contribute to safer operations, improved asset integrity and more efficient project delivery throughout the facility’s lifecycle.

The success of every Process Safety study depends on the expertise and collaboration of all participants.

TOMSEY Engineering sincerely appreciates Seplat Energy Plc, NNPC E&P Limited (NEPL), NMDPRA and every member of the multidisciplinary team for their active participation, valuable technical contributions and commitment to engineering excellence throughout the assignment.

Their collaborative approach ensured that the workshop delivered meaningful recommendations that will enhance both project safety and operational performance.

Our Process Safety & Technical Safety Services

At TOMSEY Engineering & Services International Ltd, we help clients identify, evaluate and manage risks throughout every phase of the project lifecycle—from concept development and FEED to detailed engineering, construction, commissioning and operations.

Our specialist services include:

• HAZID (Hazard Identification)
• HAZOP (Hazard and Operability Studies)
• LOPA (Layer of Protection Analysis)
• SIL (Safety Integrity Level) Studies
• Bow-Tie Analysis and Barrier Management
• Design and Operations Safety Cases
• Quantitative Risk Assessment (QRA)
• Fire Explosion Risk Assessment (FERA)
• Escape, Evacuation and Rescue Analysis (EERA)
• Consequence Modelling
• Constructability Reviews
• Construction Risk Assessments
• SIMOPS (Simultaneous Operations)
• Pre-Startup Safety Reviews (PSSR)

Partner with Us

TOMSEY Engineering & Services International Ltd remains committed to delivering fit-for-purpose engineering and Process Safety solutions that enable safer facilities, stronger regulatory compliance and improved operational performance across Nigeria’s energy industry.

Whether your project is in the conceptual design, FEED, Detailed Engineering Design (DED), construction, commissioning or operational phase, our experienced team provides independent technical facilitation and specialist safety studies that help identify risks early, optimize designs and support the successful delivery of complex energy infrastructure.

Partner with TOMSEY Engineering & Services International Ltd to ensure your next project is built on a foundation of safety, reliability, and engineering excellence.

Enhancing Pipeline Safety Through Proactive Hazard Identification and Barrier Management

TOMSEY Engineering & Services International Ltd is pleased to announce the successful facilitation of the HAZID (Hazard Identification) and Bow Tie Analysis studies for the EPU Phase 3 Gas Development Project – Pipeline Scope.

The workshop was held at Swiss International Hotel, Port Harcourt, Nigeria, bringing together key stakeholders from Renaissance Africa Energy Company, Seflam SGL, Morpol Engineering Services Limited, International Energy Services Limited (IESL) and the Nigerian Midstream and Downstream Petroleum Regulatory Authority (NMDPRA).

As the independent facilitator, TOMSEY Engineering provided technical leadership throughout the workshop, guiding the multidisciplinary review sessions and delivering comprehensive documentation to ensure that all findings, discussions and recommendations were accurately captured.

Building Safer Pipeline Infrastructure Through Early Risk Assessment

Pipeline systems are critical assets within the oil and gas value chain, requiring careful planning and rigorous risk assessment to ensure safe, reliable and efficient operation throughout their lifecycle.

The HAZID and Bow Tie studies were conducted to identify potential hazards associated with the pipeline scope and evaluate the effectiveness of preventive and mitigating barriers. By performing these assessments during the project development stage, stakeholders can proactively address risks, improve design decisions and strengthen operational resilience before construction and commissioning activities commence.

Objectives of the Workshop

The workshop provided a collaborative platform for technical experts from engineering, operations, project management, and regulatory organizations to review the pipeline design and associated risks.

The studies enabled stakeholders to:

• Identify hazards associated with the pipeline scope.
• Assess potential threats that could impact personnel, assets, the environment, and business continuity.
• Develop Bow Tie models to clearly visualize hazard pathways, preventive barriers, and mitigation measures.
• Strengthen barrier management strategies for critical risk scenarios.
• Support informed decision-making through structured multidisciplinary discussions.

This systematic approach ensured that potential risks were identified early and that practical recommendations were developed to enhance project safety and execution.

Key Outcomes

Through structured technical reviews and collaborative engagement, the workshop delivered a comprehensive set of actionable recommendations that will support the safe and efficient execution of the EPU Phase 3 Gas Development Project.

The studies contributed to:

• Improved identification and understanding of pipeline-related hazards.
• Enhanced visualization of risk pathways using Bow Tie Analysis.
• Stronger preventive and recovery barrier management.
• Improved confidence in the project’s safety strategy.
• Better alignment with regulatory requirements and industry best practices.
• Increased operational readiness for future project phases.

These outcomes provide a strong foundation for managing risk throughout the lifecycle of the pipeline infrastructure.

Collaboration That Drives Engineering Excellence

The success of Process Safety studies relies on the expertise, collaboration and commitment of every stakeholder involved.

TOMSEY Engineering extends its sincere appreciation to Renaissance Africa Energy Company, Seflam SGL, Morpol Engineering Services Limited, International Energy Services Limited (IESL), NMDPRA and all workshop participants for their active engagement, valuable technical insights, and collaborative approach throughout the assignment.

Their collective expertise played a significant role in delivering meaningful recommendations that will contribute to the project’s safe and successful execution.

TOMSEY’s Process Safety & Technical Safety Expertise

TOMSEY Engineering & Services International Ltd provides independent Process Safety and Technical Safety consulting services that help clients identify, assess and manage risks across every phase of the project lifecycle; from concept selection and FEED through detailed engineering, construction, commissioning and operations.

Our specialist services include:

• HAZID (Hazard Identification)
• HAZOP (Hazard and Operability Studies)
• Bow Tie Analysis and Barrier Management
• LOPA (Layer of Protection Analysis)
• SIL (Safety Integrity Level) Studies
• Design and Operations Safety Cases
• Quantitative Risk Assessment (QRA)
• Fire Explosion Risk Assessment (FERA)
• Escape, Evacuation and Rescue Analysis (EERA)
• Consequence Modelling
• Constructability Reviews
• Construction Risk Assessments
• SIMOPS (Simultaneous Operations)
• Pre-Startup Safety Reviews (PSSR)

Partner with Us

At TOMSEY Engineering & Services International Ltd, we are committed to delivering fit-for-purpose engineering and Process Safety solutions that enhance operational excellence, improve asset integrity and support regulatory compliance across Nigeria’s energy sector.

Whether your project involves pipelines, gas processing facilities, upstream production assets or other energy infrastructure, our experienced team provides independent technical facilitation, risk assessments and safety studies that help clients make informed decisions, reduce project risks and deliver safe, reliable and efficient operations.

Contact TOMSEY Engineering & Services International Ltd today to learn how our Engineering and Technical Safety expertise can support the successful delivery of your next energy project.

We’re pleased to announce that TOMSEY Engineering & Services International Ltd has successfully completed the HAZID and HAZOP studies for the Front End Engineering Design (FEED) stage of the Hely Creek Surface Facilities Project – PPL 221, located in the Sapele area of Delta State.

Working for Transnational Energy Limited (TEL) and Platform Petroleum Limited JV Technical (PPL JV Tech), the studies focused on the proposed flowline system designed to transport production from the re-entry of HC-02 and the new HC-03 well over 13.1 km to the Sapele Integrated Gas Plant (SIGP).

Through these workshops, our Technical Safety team facilitated structured hazard identification, detailed process deviation analysis, operability reviews, and safeguard recommendations, ensuring the FEED design aligns with applicable Nigerian and international standards while supporting safe and efficient project development.

This work forms a critical part of the FEED stage, helping to strengthen the safety and operability of the planned facilities and supporting the continued development of the Hely Creek field.

We thank the teams at TEL and PPL JV Tech for their strong collaboration and valuable contributions throughout this engagement.

At Tomsey, we deliver world-class Process Safety and Loss Prevention services, including:
• HAZID, HAZOP & SIL
• Bowtie Analysis
• Design & Operations Safety Cases
• QRA, FERA, EERA
• Technical Safety Reviews

Committed to fit-for-purpose solutions that drive operational excellence across Nigeria’s energy sector.

We are pleased to announce the commencement of the Operations Safety Case development for Belemaoil Producing Limited’s facilities in OML 55.

This comprehensive Operations Safety Case covers four major offshore platforms—Robertkiri, Idama, Jokka, and Inda—all located within Nigeria’s shallow offshore environment at approximately 25m water depth.
OML 55 lies about 40km west of the Bonny Terminal, spanning an estimated 852km² across the mangrove swamp and shallow offshore region of the south-eastern Niger Delta. Previously operated by the NNPC/Chevron Joint Venture, the asset was handed over to Belemaoil Producing Limited, in partnership with NNPC, in February 2015. Current producing fields include Robertkiri, Idama, Jokka, Inda, and Belema North.

Robertkiri Field sits west of Newcross E&P’s Ekulama Field. Its production infrastructure comprises a 12-pile platform with oil and gas processing equipment, a 6-pile utility quarters and helideck platform connected via bridge, and two separate 4-pile structures supporting the heater treater and the LACT metering system along the San Bartholomew River.

Idama Field is developed using a jack-up Mobile Offshore Production Unit (MOPU) and riser platform with capacity for 24,000 bpd of total fluids (15,000 BOPD oil and 9,000 BWPD produced water) and 34 MMscfd of gas. Production from Jokka-1 is tied back to the Idama facilities via manifold.

Inda Field is located approximately 13 km southwest of the Bonny Terminal in 25m water depth, forming part of Belemaoil’s shallow offshore operations.

The development of the Operations Safety Case formally commenced with a field visit and facility inspection to the OML 55 locations from 25th–27th November 2025. The Tomsey team journeyed via speedboats to Robertkiri, Idama, and Inda platforms—an insightful and engaging offshore experience.

The objectives of the facility tour were to:

• Conduct a comprehensive safety assessment to understand existing operational hazards.

• Evaluate the current condition, operability, and functionality of installed equipment.

• Verify the practical implementation of HSE procedures and adherence to Belemaoil’s HSE Management System.

As the project progresses, a Formal Safety Assessment Workshop will be held with full participation from NUPRC.

We extend our sincere appreciation to the Belemaoil team for their continued trust and partnership, and to the onsite personnel for their cooperation and support throughout the field visit.

At Tomsey, we remain committed to delivering world-class Process Safety and Loss Prevention Engineering across Nigeria and beyond. Our expertise covers:

• Development of Operations, Design, and Decommissioning Safety Cases

• HAZID & Bowtie Studies

• HAZOP & SIL Studies

• Design Safety Reviews

• QRA, FERA, EERA, and more

We will continue to support organizations across Nigeria and the region with safe, efficient, and future-ready energy infrastructure solutions.

At Tomsey, we remain at the forefront of technical safety consultancy and process safety management in Nigeria’s energy sector. In line with our commitment to operational risk reduction and pipeline integrity assurance, we are proud to have facilitated the Hazard Identification (HAZID) Study for the NNPC Limited Major Hydrocarbon Pipelines and Infrastructure Renewal Project — one of the most significant pipeline safety enhancement initiatives in the region.

Strengthening Nigeria’s Energy Backbone with Proven Technical Safety Risk Controls

The project covers the Engineering, Procurement, and Construction (EPC) of six (6) new pipeline systems across the Niger Delta region, with the key objective of improving process safety performance, asset integrity, and environmental protection. Through structured risk assessment and technical safety reviews, we supported the mitigation of:

• Pipeline failure risks and loss of containment scenarios

• Operational downtime due to system degradation

• Environmental and community impact from third-party interference

Our role in the HAZID facilitation ensured that Safety in Design (SiD) principles were embedded early during project planning — a critical component of ISO 45001 and API RP 1173 compliant safety systems.

Powered by Innovative Construction Technology: CHDD

The project, awarded to Fenog Nigeria Limited, adopts Continuous Horizontal Directional Drilling (CHDD) — a trenchless installation method widely regarded as a low-impact pipeline construction technique. This approach delivers key technical safety benefits, including:

• Reduced geotechnical disturbance and environmental footprint

• Improved pipeline burial security against mechanical impact

• Long-term corrosion control and system reliability

By combining advanced engineering practices with robust risk management frameworks, the project sets a new benchmark for safe pipeline infrastructure development in Nigeria.

Looking Ahead

Now at the DED / Construction stage, this project is positioned to significantly improve flow assurance, operational uptime, and regulatory compliance across Nigeria’s midstream infrastructure.

At Tomsey Engineering & Services, we remain committed to supporting stakeholders through:

 HAZID / HAZOP Studies
 Quantitative Risk Assessment (QRA)
 Fire & Explosion Risk Analysis (FERA)
 Emergency Response & Safety Case Development

Our mission is clear — to deliver safer, smarter, and more resilient energy systems for the future.

We are pleased to announce the successful completion of the Hazard and Operability (HAZOP) Study for the Ohaji Flow Station Modification Project executed for SEPLAT Petroleum Development Company PLC.

This milestone represents a critical step in ensuring the safe, efficient, and operable execution of the project. The HAZOP study was conducted in full compliance with international best practices and was facilitated by a multi-disciplinary team comprising process engineers, operations personnel, safety experts, and project stakeholders. The structured and systematic review identified potential process hazards and operability concerns associated with the planned modifications at the Ohaji facility.

We commend the entire project team and SEPLAT PLC for their commitment to safety, professionalism, and operational integrity. With this major milestone completed, we look forward to the seamless execution of the next phases of the Ohaji Flow Station Modification Project