Leading independent engineering consultants for

Subsea tiebacks feasibility studies and front-end design (FEED)

Fast-track your subsea project with our cost-efficient and reliable front-end assessments.

Subsea engineering services

Offshore development requires deep domain knowledge, practical experience and a partner who understands the complexities of subsea projects.

Our team of subsea specialists can support your project from early concept selection and development to engineering, construction, start-up and operations.

With over 40 years of experience, we have delivered hundreds of successful projects, and our proven expertise and vast industry database ensure you benefit from our global track record and deep domain knowledge.

Subsea experience of

40+ yrs

as independent authority

Involved with

75%

of global subsea tiebacks

Projects totalling

600,000 km

of subsea pipelines

Front-end consulting

Move your project to the final investment decision with confidence.

Achieving successful FID requires in-depth expertise, awareness of supply chain conditions, economic drivers and regulatory constraints, along with advanced engineering processes and design tools.

Our feasibility studies define the ideal logistical and commercial parameters to ensure your subsea project is both viable and optimised for profitability.

Feasibility analysis and early concept studies

We understand the challenges in delivering bankable projects, managing supply chain and technology risks and optimising your project for long-term success. Our studies support your decision-making process to help you quickly determine which solutions are suitable for further development and how to best tie in with existing fields, with minimal expenditure.

Pre-FEED studies

Our team of experts can guide you through the early stages of your project to develop and optimise a concept and basis of design that meets your objectives.

Optimised layout

Optimise designs for efficient and reliable operations

Analyse more options and achieve lower production costs with our proven design optimisation methods and SubseaXpert™ solution.

Subsea expertise icon

Mitigate technical, financial and regulatory risks

Benefit from our global expertise, deep industry knowledge and extensive experience in subsea project development.

Minimise cost

Minimise development costs and assessment time

Get quick and accurate TOTEX estimates with minimal expenditure and risk.

Find the optimal design concept from a vast array of options

Subsea engineering means minimising risks.

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Technical feasibility and design optimisation

Developing an optimal design for subsea tiebacks involves complex engineering calculations and simulations to ensure the infrastructure can withstand a wide range of loading conditions with varying degrees of uncertainty and magnitude.

Our expertise includes specialist subsurface, flow assurance and process, materials, subsea hardware, structures, controls, wells, flowlines and risers discipline pools, within integrated teams to plan and design all aspects of your subsea project.

Our advanced modeling and simulation tools can optimise the design of subsea pipelines, umbilicals and other infrastructure components. We also help select appropriate materials and technologies to improve reliability and performance.

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Cost estimation and economic viability

Accurately estimating project costs and timelines is critical for determining economic viability.

Our whole-of-life approach optimses your project for TOTEX (total expenditure).

We develop detailed cost estimates and financial models, considering various scenarios and risks, identifying saving opportunities and providing strategies for efficient resource allocation, ensuring the project remains financially sustainable.

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Compliance and environmental impact assessments

Ensuring compliance and minimising environmental impact is essential for obtaining necessary regulatory approvals.

We guide developers through the regulatory landscape, helping you understand and meet requirements.

We also conduct environmental impact assessments and develop mitigation strategies to minimise the ecological footprint of your project.

We can support you from feasibility assessment to FEED, EPCm and operations

Your project timelines are crucial. We align our strategies with your schedule to keep you on track while managing development risks and opportunities.

We can partner with you throughout your asset lifecycle or provide specific engineering analyses to aid project decisions, assist with key design tasks or improve operational efficiency.

Feasibility
Subsea advisory icon
Opportunity & market assessment Concept development & appraisal Technology
selection
Decarbonisation studies Due diligence Risk and technical safety
Development
Subsea design icon
Full pre-FEED & FEED services Technical safety Procurement support, technology benchmarking ITT prep, procurement process Contract evaluation & negotiation Flow assurance and
measurement
Owner鈥檚 engineer services
Delivery
Subsea delivery icon
Detailed design support Supplier documentation review Pre-commissioning operational hazards assessment FAT witness Construction management Interface management and asset integrity Full EPCm capability

糖心Vlog advantages

Knowledge + experience
Multi-discipline expertise Icon

Our multi-discipline knowledge, combined with our equipment cost reliability and technical readiness level database, allows us to benchmark across global projects and refine our approach.

Design process and tools
Customised solutions Icon

Our risk-focused processes and tech enable us to create more efficient designs up to 20% faster and at a lower cost.

Our 厂耻产蝉别补齿辫别谤迟鈩 solution can deliver the most efficient assessment of potential configurations in record time.

Market insights
Efficiency boosts and cost savings Icon

Leveraging our market intelligence and supply chain relationships allows us to optimise material selection for safe and cost-effective production.

Full-lifecycle expertise
Reliable equipment and extended asset life Icon

We know what works in practice.

Our combination of engineering, digital and domain expertise can support you from analysing feasibility to optimising operations.

Capacity for all project types
Peace of mind Icon

Our global teams can deploy quickly to support you from one-off studies to complex, end-to-end mega projects.

A partner you can trust

Our world-leading expertise in subsea tiebacks and export systems is underpinned by decades of proven excellence in capital project development and delivery.

With a portfolio of over 300 successful subsea tiebacks for IOCs, independents and NOCs, we have demonstrated expertise in diverse environments, adapting to regulatory and market conditions to deliver optimal solutions.

Our interdisciplinary team includes more than 1000 experts in subsea, geotechnical, pipeline, environmental and structural engineering, as well as flow assurance, control systems, project management, HSE, cost estimation and economic analysis, ensuring a comprehensive approach to your project.

Research and development

Leading the application of new technology on subsea projects.

Global technical experts

Our subsea engineers are experts and thought leaders in their domains, with a strong commitment to research, innovation and knowledge sharing.

糖心Vlog has supported the development, qualification and use of the new methods and technologies on subsea projects, including for:

  • Deepwater and shallow water challenges
  • Pipe in pipe systems
  • Electric heating systems
  • HIPP systems
  • Riser systems
  • Flexible pipe
  • Integrity management
  • Flow assurance
  • Subsea hardware and control system
  • Hydrogen and CO2 pipelines
Subsea committees and JIPs to advance industry

We helped develop codes with ASME, API and DNV, and we regularly participate in and lead subsea JIPs (joint industry projects), industry committees and research initiatives, including:

  • API SC 17 – chairing and participating in multiple sub-committee 17 task groups for subsea production and intervention systems, assisting with the development and maintenance of subsea standards
  • DNV pipeline committee – providing user input into DNV subsea pipeline code updates
  • Cability JIP (Cable stability):
    Creating guidelines for assessing cable stability on rocky seabeds.
  • H2Pipe & CO2PipeSafe JIP: Collecting industry best practices and closing knowledge gaps for pipeline design and operation.
  • REPLACE JIP – DNV GL: Developing guidance on replacing the hydrotest of gas pipelines
  • SEAR JIP (Subsea Equipment Australia Reliability): Sharing operator experience in warm waters and addressing reliability issues to improve component design and reduce intervention costs.
  • SURFIM JIP (subsea umbilicals, risers and flexibles integrity management): Improving subsea equipment reliability through collaboration, focusing on SCM reliability, choke valves, chemical metering, control systems, umbilical integrity and data analytics.
  • TIDE JIP (Transforming Energy Infrastructure through Digital Engineering):
    Enhancing understanding of ocean environments, predicting effects on sea structures and managing seabed infrastructure.

Recent subsea feasibility studies and FEED projects

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Common questions

Project timelines and costs

The cost of a feasibility study can vary depending on the breadth of scope, project uncertainties and extent of project decisions to be assessed.

糖心Vlog's SubseaXpert tool combines early concept development processes with 糖心Vlog's design applications for system evaluation (CAPEX, OPEX, FA, RAM), detailed design, and project execution. This integration, along with our experience in delivering and operating assets, guarantees efficient and competitive quality solutions at any stage.

糖心Vlog can also customise the project scope to meet your budget and project targets.

Contact us for a proposal

Depending on the scale, complexity and project location, a feasibility analysis can be completed in as little as three weeks or up to nine months for complex mega projects.

Our agile project management practices allow us to deliver feasibility studies within the agreed timeframe, adapting to any project-specific requirements.

With 奥辞辞诲鈥檚 厂耻产蝉别补齿辫别谤迟鈩 design tool, we can save several weeks from the typical timeline for early-phase studies.

Contact us for an estimate

The FEED timeline typically ranges from three to eleven months, depending on the project's scale and complexity. It includes stages such as feasibility analysis, conceptual design, detailed design and final review.

We can be involved from start to finish and take on all roles, from the conceptual screening phase through feasibility and pre-FEED/FEED. We can provide detailed design, acting as engineer of record and through project commissioning to operation. We can also act as owner鈥檚 engineer through all project phases or as independent engineer providing due diligence for project finance or acquisition. In addition, our subsea design, commissioning and operational teams are available to guide, design and optimise your project throughout its lifecycle.

Feasibility study

Our methodology is iterative and collaborative, involving stakeholders at every stage to refine the project scope and objectives, ensuring the feasibility study is robust and reflective of all project goals.

Our structured approach integrates allcore engineering disciplines into a single digital platform.

The early concept phase usually starts with framing workshops to develop strategy and decision maps. Technical studies and analysis are conducted to rank strategies and aid decision selection.

More detailed engineering then proceeds simultaneously on chosen concepts. Parametric designs are carried out in parallel to handle alternative bases and uncertainties, reducing the overall schedule and rework if there are changes to the design basis.

Our feasibility study deliverables include a comprehensive report, an executive summary for quick reference and a digital dashboard for ongoing project analysis.

We also create early-phase design documentation such as BFDs, PFDs, single lines, plant layouts and other documentation required by the client.

Our financial models incorporate sensitivity analyses, scenario planning and stress testing to provide a comprehensive view of project financials.

We provide detailed cost breakdowns, using our extensive database of industry costs and advanced statistical methods to forecast with precision, tailored for the region of your project for a more accurate assessment.

奥辞辞诲鈥檚 rhi project management team specialises in project cost estimating and schedule development. 糖心Vlog rhi has supported a large number of global projects, including subsea, topside facilities and onshore) and amassed a significant database of cost and schedule data, which is continuosly updated to reflect current market conditions.

糖心Vlog rhi rhiCOMS tools and cost estimation processes allow quick cost and schedule development for O&G projects. rhiCOMS is integrated with SubseaXpert.

Development and project risks are initially identified from 糖心Vlog's extensive past project database along with associated prevention (inherent safety) and mitigation measures. Subsequent risk workshops are performed to ensure all risks are assessed and managed.

Where needed, we can employ advanced risk modelling techniques to optimise the development of mitigation strategies that safeguard project timelines and investments.

Our risk assessment specialists have access to leading industry data providers as well as our extensive global experience database, allowing us to provide more accurate and reliable risk assessments than most competitors.

Our expertise in carbon policy encompasses a global perspective and provides businesses and organisations with comprehensive guidance on navigating the intricate landscape of carbon-related regulations and compliance measures embedded in many different regions, including the United States Inflation Reduction Act, Canadian ITC, EU鈥檚 RED scheme and Carbon Border Adjustment Mechanism (CBAM).

We specialise in helping our clients understand regulatory provisions and their implications for carbon emissions and assist them in developing tailored strategies to reduce their carbon footprint, stay in compliance and maximise government incentives.

Our team of experienced consultants will conduct thorough assessments, offering insights into carbon pricing mechanisms, emission reduction targets and incentives for sustainable practices.

We also provide proactive recommendations to seize opportunities for emissions trading, offset projects and investments in renewable energy sources, enabling our clients to not only comply with the regulations but also foster sustainable growth and reduce their environmental impact. With our advisory services, clients can stay ahead of evolving carbon policies and make informed decisions that align with their sustainability goals and regional policy requirements.

System architecture is developed from 奥辞辞诲鈥檚 extensive database of previous subsea tiebacks based on the project goals, design basis, functional requirements, largely driven by production performance requirements. The range of suitable subsea configurations are identified and evaluated as described above.

Similarly field layouts are developed based on given reservoir targets accounting for well defined equipment and construction layout requirements and constraints along with external hazards and geohazards. Again 奥辞辞诲鈥檚 passed project experience has been used to develop criteria for determining field layouts.

Flowline routing tools are used for determining optimum routes accounting for bathymetry to minimise spanning and geohazards whilst offsetting such against minimum route lengths.

We employ a structured engagement framework that ensures all voices are heard and considered, fostering community support and project buy-in.

We work hand-in-hand with you to define the critical project requirements and perform regular reviews to ensure project quality and adherence to your contractual standards.

When requested, we can conduct thorough environmental impact assessments and integrate circular economy principles to minimise the ecological footprint of subsea projects.

Design and technology

糖心Vlog has a custom design optimisation approach for subsea projects. We work with our clients to determine the critical project requirements.

The primary factor in ensuring an optimised design is to ensure the optimum concept is selected.

奥辞辞诲鈥檚 SubseaXpert and rhiCOMs tools enable the parallel evaluation of multiple concepts and designs against agreed assessment criteria such as CAPEX, OPEX, production performance, HSE, project risks (Constructability, Integrity and lead times) and system availability. These are typically weighted to account for the projects primary drivers. This process ensures that the most suitable concept is selected.

Optimisation of the facilities is then achieved through the use of 奥辞辞诲鈥檚 state of the art design tools that ensure fit for purpose integrity envelope for the facilities based on the determined load criteria and associated uncertainties.

Yes, SubseaXpert has been specifically developed to enable multiple designs to be developed simultaneously eg, a design with flexible flowlines and another with rigid flowlines or different diameters etc. can all be developed at the same time with limited additional effort to developing a single design.

In general, there is limited to no impact on cost and schedule, though this does depend on the extent and timing of the change. Changing the pipeline diameter or various system process parameters (design pressure and/or temperature etc.) even after the initial design is complete will not require any significant rework, and will have limited schedule impact. Increased schedule (and potentially) activity would likely occur where key project decisions with numerous stake holders need to be revisited

components and vessels and equally, we are aware of emerging technologies and new products that may enhance the design delivery. Especially for fast- track projects with drive for earliest production and minimum CAPEX, the system architecture, functional and components specifications are developed to allow the market to propose alternative optimum solutions to the base case solution.

糖心Vlog has a rigorous business management system (BMS) that defines and integrates our Quality and Technical assurance processes along with the engineering workflows and project management systems. These define the checking, verification and design / PEER review requirements for each project.

Our SubseaXpert solutions incorporates a large part of the BMS processes. Firstly the system is fully validated, all design data is controlled with a single repository for design data (there are no multiple locations of the same design data). Once any design data is checked and approved (electronically) any subsequent changes will highlight calculations that are no longer valid (an e-mail is also sent to relevant stakeholders).

Our management of change processes defines the processes for identifying changes, evaluating their impact and implementation activities and identifying and advising all stakeholders.

No changes can be made to approved design data in SubseaXpert without this being flagged (all dependent calculations become highlighted as not aligned with the design basis). Design basis and calculation checking and approvals can be restricted to authorised individuals.

We ensure safety through rigorous risk assessments, strict adherence to industry standards and the incorporation of fail-safes. With our 厂耻产蝉别补齿辫别谤迟鈩 design tool, we can optimise the size, location and layout of subsea projects to deliver the most efficient design and achieve the lowest production cost.

厂耻产蝉别补齿辫别谤迟鈩

厂耻产蝉别补齿辫别谤迟鈩 currently covers subsea pipeline engineering from concept to FEED and operations support. The solution is being further developed to support the wider subsea systems design.

厂耻产蝉别补齿辫别谤迟鈩 can be accessed by clients through a dedicated PowerBI dashboard which allows the user to view the inputs, methods and results of the various assessments performed.

Yes, but this cost is a fraction of the reduced cost of engineering hours, thereby resulting in significant net savings to the customer. The cost of 厂耻产蝉别补齿辫别谤迟鈩 includes third-party technical applications such as Ansys and Abaqus,) which are integrated with the solution.

Experience and track record

糖心Vlog's track record in the industry is unparalleled, and we bring extensive knowledge and practical experience from both subsea development and process sides.

We have more than 60 years of experience in oil & gas production and 40 years of experience specifically developing subsea projects.

With a portfolio of over 300 subsea projects, 糖心Vlog has demonstrated expertise in diverse environments, adapting to various regulatory and market conditions to deliver optimal solutions.

Our interdisciplinary team includes experts in subsea, geotechnical, pipeline, environmental and structural engineering, as well as flow assurance, control systems, project management, HSE, cost estimation and economic analysis.

We have extensive experience navigating the supply chain for subsea tiebacks and export systems, including sourcing reliable materials, managing logistics and ensuring timely delivery of components.

糖心Vlog has established relationships with leading material supply vendors, which allows us to keep up with the latest manufacturing capabilities, production timelines and technology developments.

We focus on economies of scale, process optimisation and strategic sourcing to reduce costs.

Our 厂耻产蝉别补齿辫别谤迟鈩 design tool applies expert-validated models to rapidly find optimal design configurations, resulting in significant cost savings.

Additionally, we explore innovative financing and operational models to achieve competitive development costs.

Client support

We can be involved from start to finish and can take on a variety of roles, from the conceptual screening phase through feasibility and pre-FEED/FEED. We can provide detailed design, acting as engineer of record and through project commissioning to operation.

We can also act as owner鈥檚 engineer through all project phases or as independent engineer providing due diligence for project finance or acquisition.

In addition, our subsea design, commissioning and operational teams are available to support your project throughout its lifecycle.

As a publicly traded company, our financial health is transparent. We have strong credit ratings and a proven track record.

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