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Company Details

Company Name Intecsea
Logo Intecsea.png
Address 240 St Georges Tce
Contact Marius Martens
Phone +61 408858864
Number of Employees 80
Web Page
ABN 18 008 961 260

Subsea and Offshore Markets

Company Overview

Intecsea provides specialised engineering and project services to the offshore exploration, production, services and transportation sectors of the Energy Industry for a wide range of water depths.

So how does Intecsea relate to Advisian and Worley?

  • Intecsea collaborates with clients, contractors and competitors to turn complex challenges into practical results. Therefore, we often work on short term contracts.
  • Advisian provides strategic and business-level consulting, integrated with deep technical expertise, across the entire asset lifecycle with a truly global footprint.
  • Worley offers our clients specialists in full project delivery of large, complex, strategically important projects, and thus, is often involved in long term contracts.
  • Intecsea's capability, combined with that of the Worley and Advisian, offers clients a single integrated, full lifecycle project delivery service.

Specialist Equipment, Capabilities

Our disciplines cover full project lifecycle, both Greenfield and Brownfield: Front End Consultancy, Projects, Construction & Hook-up Support, Integration, Asset Management and Decommissioning & Reclamation.


Our disciplines are (expand for extra information):

Advanced Analysis

Capable of carrying out remote data acquisition and associated data analysis for OPEX minimisation. Skilled in the management of fatigue accumulation resulting from slug-induced pipeline motions and the requirement to measure, assess and manage long term pipeline fatigue (such as 50 years or more).

Specialty areas include:

  • Dynamic process simulation
  • Data analytics, advanced monitoring and digital twins
  • Integrated OLGA / Hysys simulation for liquid slug analysis
  • Finite Element Analysis (FEA)
  • Computational fluid dynamics (CFD)
  • Pressure equipment assessment
  • Pipeline assessments (including buried)
  • Vibration analysis and measurement
  • Surge analysis / liquid hammer
  • Blast, explosion, gas dispersion modelling
  • Fatigue assessment
  • Sound and acoustic analysis
  • Discrete event simulation / logics modelling

Floating Systems

Extensive experience on all types of floating systems—Monohulls (FPSO, FSO, FPU, etc.), TLPs, Spars, and Semi-submersibles. Key technical staff have over 30 years of individual experience on various types of floating systems, and are considered to be the industry leaders and pioneers in their field of expertise.

Specialty areas include:

  • Development of conceptual, FEED and detailed design of floating facilities (new-builds and conversions)
  • Intact and damage stability
  • Hydrodynamics and motions
  • Response Based Analysis (RBA) for single point vessels (FPSO and FLNG etc.)
  • Green water analysis
  • Resistance prediction
  • Afloat lifting analysis
  • Global and local structural assessments
  • Fatigue analysis
  • Finite element analysis (FEA)
  • Platform sizing and optimization
  • Weight management
  • Transportation and installation design and analyses
  • Capability to use Maxsurf suite, SESAM, AQWA, MOSES, LR Rules Calc, OrcaFlex, Ariane, in addition to many in-house programs.

Offshore Energy

We will apply the core competencies we have developed during 25+ years supporting the offshore pipelines & subsea industry to develop safe, robust, efficient, and cost-effective designs for the offshore wind industry.

Specialty areas include:

  • Offshore environment
    • Wind & waves, hydrodynamic loading
    • Turbine/foundation loading interaction (dynamics, fatigue, etc.)
    • Corrosion protection
    • Seabed morphology and sediment transport
    • Cable routing, burial and protection
    • Pile Design
  • Advanced engineering
    • Advanced finite element analysis (FEA) capabilities
    • Reliability-based design
    • Code development
  • Project management support
    • Planning, design, procurement and execution
    • Tendering package preparation and evaluation
    • Risk assessment

Flow Assurance

Capable of carrying out thermal-hydraulic design and assessment of multi-phase production/transport systems as well as prediction, prevention, and remediation of flow stoppages due to solid deposition, by considering the reservoir characteristics, production profiles and environmental conditions.

Specialty areas include:

  • Dynamic Modelling
    • Liquid management and slugging assessments
    • Hydrate and wax management studies
    • Over pressure protection analysis
    • Integrated process and pipeline simulators
  • Production Chemistry
    • Fluid characterization modelling
    • Lab fluid and chemical inhibitor testing
    • Solid deposition modelling
    • Field support
  • Systems Engineering
    • Philosophies, strategies and procedures
    • Managing interfaces between subsurface, subsea, facilities and operations
    • Design of specific subsea and pipeline processes
  • Integrated Asset Modelling
    • Life of Field Assessments
    • Topsides and subsea processing requirements
  • Economic analysis


Capable of carrying out ultra-deepwater, long distance, large diameter transmission pipeline projects, and conventional offshore platform-to-platform pipelines. Full-scale testing programme management, dense flow phase management, pigging technology, and advanced mechanics capability available.

Specialty areas include:

  • Technical and feasibility studies
  • Survey management and route selection and visualization
  • Preliminary and detailed design
  • Field development engineering
  • High Pressure and High Temperature (HP/HT) pipeline engineering
  • Arctic pipeline engineering
  • Insulated pipe-in-pipe engineering
  • Ultra-deepwater and deepwater flowline and pipeline engineering
  • Pipeline repair engineering
  • Materials and Non-Destructive Testing (NDT) engineering
  • Project management
  • Manufacturing and construction management
  • Owner’s engineering
  • Regulatory compliance engineering
  • Asset Integrity Management and operation support
  • Flow assurance assessment


Capable of carrying out full range subsea engineering and project management services, including Front End Engineering Services (FEED), engineering services for subsea production, structural and other subsea systems (hardware configuration, installation, integrity and risk management etc.).

Specialty areas include:

  • Traditional Subsea Services:
    • Flow Assurance
    • Structures
    • Risers – Flexible, SCR, Hybrid
    • Subsea Trees
    • Systems, Umbilicals and Controls
    • Geotech – from Geohazards to foundations
    • Geophysical
    • Subsea Processing, Pumping and Compression
    • Valves, Flow Metering, Distribution, Connectors/Hubs & Jumpers
    • Materials
    • Geomatics and CAD
    • Advanced Analysis such as Finite Element Analysis (FEA)
  • FEED Services:
    • Economics and cost evaluations
    • Determining Return on Investment and Net Present Value
    • Concept selection
    • Predevelopment Planning
    • Pre-FEED
    • FEED and Detail Engineering
  • Subsea Production System Services:
    • Technical and economic studies
    • Field development engineering
    • Project and construction management
    • Subsea systems engineering
    • Specifications, scopes of work, bid packages
    • Equipment procurement
    • System integration test coordination
    • Subsea installation supervision
    • Start-up technical coordination
    • System operating manuals
    • Flow assurance and operability
    • Asset integrity planning
  • Subsea Structural Engineering:
    • Structural design services for manifold, pipeline end termination (PLET), tie-ins, and auxiliary structural support equipment
    • Advanced FEA
    • Fabricator related services such as bidding strategies, contracting, planning and implementation, engineering and management
    • Welding and Automated Ultrasonic (AUT) systems capabilities
    • Onshore construction risks
  • Other Services includes but not limited to:
    • Project Management Consultant (PMC) contracting services
    • Governmental assistance in developing regulations
    • Local content law guidance
    • Infrastructure needs based on offshore development requirements
    • Individual secondments of key personnel
  • Pseudo Dry Gas (PDG) System (A Subsea Tie Back Technology):
    • Technology that allows greater subsea tie-back distance (both horizontally and vertically) by well back pressure reduction
    • Utilisation of compact passive piggable liquid removal units and small single phase centrifugal pumps
    • Pipeline with larger diameter can be used under this technology without issues from gravitational pressure loss
    • Massive reductions in upstream Scope1&2 CO2 emissions by 80 %
    • Reduction in MEG upwards of 50 %
    • Reduction in CAPEX upwards of 40 - 60 % over alternatives concept
    • Highly accommodating to brownfield and LNG development scenarios
    • Removal of the need for offshore or subsea compression

Example Projects

Area Client Project Role Project Year Description
Offshore Wind Ventolines Westermeerwind Offshore Wind Farm Owners Engineering 2016
  • Review EPCI contractor deliverables
  • Perform independent assessment of specific design aspects
  • Support and advise the client on matters related to offshore design

Floating Systems

Santos Barossa FEED

Detailed Design

  • Design of HPHT infield flowlines gathering system (3 drill centers) subject to buckling and walking (SAFEBUCK design) such that installation via S-lay and Reel-lay is feasible for a range of material options.
  • Design of risers and overall field layout to provide sufficient flexibility for FPSO design completion (two designs).
Carbon Capture and Storage Chevron Gorgon

Defence Australian Navy Submarine Recovery Concept Studies 2020
  • Created generic vessel
  • Conducted stability analysis
  • Conducted motions analysis

Digital Twinning

Mooring, Motions

Big Data

Woodside Browse RBA FEED 2020
  • Prepared Metocean data
  • Created hydrodynamic model
  • Completed heading analysis
  • Calculated global and mooring responses in frequency domain (one million sea states)
  • Performed Extreme Value Analysis to produce end year design values
Machine Learning PRCI Extension of the hydrodynamic force model on pipes Concept Studies 2020
  • Perform CFD on 2D pipes to extend hydrodynamic force database for a range of pipe diameters
  • Use linear interpolation to provide a baseline error for prediction of hydrodynamic force
  • Train and use a Deep Neural Network (DNN) to predict the time series hydrodynamic force
  • The DNN model was successful in identifying patterns in the time series and predicting the hydrodynamic force