Analysis Tools

The primary Flow Assurance/production chemistry and analysis tools used at INTECSEA are:

• PIPESIM
• OLGA
• Multiflash
• PVTsim
• OLI ScaleChem and StreamAnalyzer
• In addition, ANSYS (or other FEA / CFD programs) are used for detailed flow and heat transfer modeling and analysis of insulation systems and other specialized programs are available and are used where/when needed.  INTECSEA personnel have experience with other analysis tools including PIPEPHASE, HYSYS, Natasha, Fluent, Ansys, SPS and Depowax.

PIPESIM

PIPESIM is a workhorse for steady state thermal-hydraulic modeling of multiphase flow systems; both single-line and network systems. PIPESIM can model the entire system, from the reservoir to the production facilities. It competently models black oil and compositional systems. Industry-standard multiphase flow correlations and mechanistic models, including OLGA-S, are available. INTECSEA uses its own experience to assure that appropriate correlations, equations of state, fluid variables, and other system options are used for the analysis being performed.  Additionally, INTECSEA is experienced with the PIPESIM Field Planning Tool, which integrates reservoir models with the hydraulic model.

OLGA

Many basic system design attributes can be determined using steady state analyses (i.e. with PIPESIM). However, transient simulation is needed to address more detailed design and operability considerations.  INTECSEA uses OLGA, a transient, multiphase, thermal-hydraulic simulation software.  Common uses for OLGA include determining system/component warm-up and cool down times, blowdown fluid rates and temperatures, and slugging behavior (rate change, hydrodynamic, and more severe terrain induced slugging).  In addition, the three-phase version of OLGA is necessary for predicting liquid holdup in low rate gas/condensate systems.

OLGA and transient simulation is used increasingly as more system detail is developed.  The transient temperature and velocity behavior of the transported fluids figure prominently in the operability design of the system.

Multiflash and PVTSim

Both Multiflash and PVTSim are used for physical property and phase behavior prediction and characterization of reservoir fluids. They can both predict hydrate phase behavior and inhibition prediction. PVTSim can model the thermodynamics of waxes and asphaltenes in produced fluids. The decision of which to use within the design process is based on their individual capabilities and INTECSEA experience.

At the beginning of the process, it is particularly important to use these programs and experience to evaluate available fluid data to assess its validity (a common problem with the limited fluid data obtained from exploration wells).  During the rest of the process, the programs will be used to develop fluid characterizations, to assess fluid thermodynamic behavior, and to evaluate new fluid data as it becomes available.  In particular, these programs will be used to determine hydrate inhibitor performance and volume requirements. The understanding of inhibitor performance and volumes figures prominently in the operability design of the system.

Multiflash is the thermodynamic and physical property package included in PIPESIM, giving PIPESIM full compositional capability and the ability to predict hydrates.  PVTSim is the thermodynamic and physical property package included in OLGA.  INTECSEA also possesses stand-alone licenses for both PVTSim and Multiflash.

OLI ScaleChem/StreamAnalyzer

INTECSEA personnel have experience with OLI ScaleChem and StreamAnalyzer software, which are state-of-the-art software used to solve problems related to production chemistry. They are used for: predicting scaling tendencies; solids formation; pH; ionic compositions of a given chemistry and reaction between chemicals; phase behavior; electrical conductivity; and several other properties of single and mixed brines.  These properties can be predicted over the wide range of temperature and pressure conditions expected between the reservoir and topside facilities. The software has capabilities to reconcile alkalinity-pH-CO₂, determine CO₂ in gas and density, examine the incompatibility of methanol, ethanol, glycol, etc., and equilibrate brines with hydrocarbon phase involving compositions of the hydrocarbon fluids.

•  Systems Engineering
  • Systems Integration
  • Integrity and Risk Management
•  Flow Assurance and Operability
  • Complete System Designs
  • Thermal-Hydraulic Simulations
  • Hydrate Prediction, Inhibition,
    and Remediation
  • Production Chemistry –
    Wax and Asphaltene Management
  • Production Chemistry – Scale Management
  • Slug Prediction and Slug Catcher Sizing
  • Production/Flow System Operability
  • Production System Design
  • Flow Assurance and Operability
    Design Stages
  • Analysis Tools
•  Subsea Engineering
  • Overall Field Development Planning
  • Conceptual Design
  • Subsea Structural Design
  • FEED
  • Detailed Engineering / Design / Analysis
  • Fabrication / Manufacturing Services
  • Installation Support
  • Project Conclusion
•  Subsea Active Production Technologies
•  Offshore Wind
•  Interface Management
  • Workflows and Processes
  • Interface Management Capability
  • Interface Management Tool
•  Construction Management
  • Design Support
  • Construction Planning
•  Project Management
  • WPMP
  • EMS
•  Materials Engineering
  • Materials Selection
  • Corrosion Management
  • Welding Engineering
  • Non-Destructive Testing

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